HomeMy WebLinkAboutAPA2704-
.-
:"'!"
.",...
I
':lIlIIIIIII
~..
TASK 36 SUPPORT TECHNICAL REPORT
HYDROLOGICAL INVESTIGATIONS AT SELECTED
LOWER SUSITNA RIVER STUDY SITES
by:Tim Quane,Pat Morrow,and Isaac Queral
Aquatic Habitat and Instream Flow Project
ALASKA DEPARTMENT OF FISH AND GAME
SUSITNA HYDRO AQUATIC STUDIES REPORT SERIES
r
~
I
.....
-
ALASKA DEPARTMENT OF FISH AND GAME
SUSITNA HYDRO AQUATIC STUDIES
TASK 36 SUPPORT TECHNICAL REPORT
HYDROLOGICAL INVESTIGATIONS AT SELECTED
LOWER SUSITNA RIVER STUDY SITES
by:Tim Quane,Pat Morrow,and Isaac Queral
Aquatic Habitat and Instream Flow Project
Prepared for:
ALASKA POWER AUTHORITY
334 W.FFTH AVE.
ANCHORAGE,ALASKA 99501
ARLIS
Alaska Resources
Library &Information Services
AncbJmge,l\:.4ska
".,.
TABLE OF CONTENTS
Page
1.0 OBJECTIVES OF STUDy..........................................1
2.0 METHODS......................................................2
2.1 Site Selection...............................................2
2.2 Field Data Collection......................................2
2.2.1 Stage....4
2.2.2 Streamflow..............................................4
2.2.3 Channel Geometry !1............................................................5
2.2.3.1 Thalweg Profile "III"
2.2.2.2 Cross Section Profile .
5
6
2.3 Data Analysis ~....................6
2.3.1 Stage and Streamflow...................................6
2.3.2 Initial Breaching and Controlling Discharges...........8
2.3.2.1 Initial Breaching Discharges :............8
2.3.2.2 Controlling Breaching Discharge....................8
2.3.3 Backwater...............................................9
2.3.4 Cha-nnel Geometry.................................................10
2.3 .4.1 Thalweg Profi 1e.. ....... .... . . . . . .. . ....... . . . ......10
2.3.4.2 Cross Section Profile..............................11
3.0 RESU LTS III • • • •..• • •.. ..••12
3.1 Island Side Channel (RM 63.3)..............................12
3.1.1 Site Description....12
3.1.2 Stage/Discharge Relationship....15
3.1.3 Mainstem Cont~olling and Breaching Discharges..........20
3.104 Channel Geometry II II II •••e....23
"""'I
......
o
M
C'\I
~
ooo
lD
lD
I""'-
M
M
3.1.4.1 Thalweg Profile .......•....•.......................
3.1.4.2 Cross Section Profile ...•.......•..................
3.1.5 Backwater _.
3.2 Mainstem West Bank Side Channel (RM 74.4).....•............
3.2.1 Site Description .•................•....................
3.2.2 Stage/Discharge Re1ationship ~.
3.2.3 Mainstem Controlling and Breaching Discharges .
3.2.4 Channel·Geometry .
i
23
25
25
27
27
30
33
35
TABLE OF CONTENTS (Continued)
Page
3.2.4.1 Thalweg Profile....................35
3.2.4.2 Cross Section Profile..............................36
3.2.5 Backwater.... . . . . . .... . .... . . . . . .. . . . .. .. . . . .. . . .. . . . . .36
3.3 Circular Side Channel (RM 75.3)............................39
3.3.1 Site Description.......................................39
3.3.2 Stage/Discharge Relationship...........................41
3.3.3 Mainstem Controlling and Breaching Discharges..........41
3.3.4 Channel Geometry.....................................•.48
3.3.4.1 Thalweg Profile....................................48
'3.3.4.2 Cross Section Profile..............................48
3.3.5 Backwater.......48
3.4 Sauna Side Channel (RM 79.8)...............................51
3.4.1 Site Description.......................................51
3.4.2 Stage/Discharge Relationship...........................52
3.4.3 Mainstem Controlling and Breaching Discharges..........57
3.4.4 Channel Geometry.......................................58
3.4.4.1 Thalweg Profile...58
3.4.4.2 Cross Section Profile..............................58
3.4.5 Backwater ...•...•.•4l ••••••!Il<ll.O.O ••IIII •••O ••<!l.~".8.CIl •••••e 60
3.5 Sunset Side Channel (RM 86.9)..............................60
3.5.1 Site Description.......................................60
3.5.2 Stage/Discharge Relationship...........................67
3.5.3 Mainstem Controlling and Breaching Discharges..........67
3.5.4 Channel Geometry .....,'.................................69
3.5.4.1 Thalweg Profile....................................69
3.5.4.2 Cross Section Profile..............................69
3.5.5 Backwater..........•....•..•.......69
3.6 Trapper Creek Side Channel (RM 91.6).......................72
3.6.1 Site Description.......................................72
3.6.2 Stage/Discharge Relationship...........................75
3.6.3 Mainstem Controlling and Breaching Discharges..........78
3.6.4 Channel Geometry...80
i i
TABLE OF CONTENTS (Continued)
3.6.4.1
3.6.4.2
Thalweg Profile .
Cross Section Profile ..
80
80
3.6.5 Backwater .81
-
4.0
5.0
6.0
7.0
8.0
9.0
SUMMARY ••••••••••••••••••••••••••••••••••••••••••••••••••••••
GLOSSARY .•••••••••••••••.••••••••••-•••••.
CONTR I BUTORS •••••e-•••••••••••••••••••••••••••••••••••••••••••
AC KNOWL EDGEMENTS .
LITERATURE CITED ....
ATTACHMENTS •••.•••.•...._••.••..•••.•••..•••.•••.•••.•••••••.•~
iii
84
91
96
97
98
LIST OF TABLES
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Task 36 study sites supported by the
Physical Description Support Program .
A comparison of 1984 observations used to
determine the initial breaching mainstem
discharge at Task 36 study sites ;..
A comparison of flow estimates determined
from equations developed from rating curves
for controlling mainstem discharges .
A comparison of water surface elevations
from Task 36 transects located within
Island Side Channel .
A comparison of water surface elevations
from Task 36 transects located within
Mainstem West Bank Side Channel ..
A comparison of water surface elevations
from Task 36 transects located within
Circular Side Channel .
2
21
24
26
37
49
Table 7.A comparison of water surface elevations
from Task 36 transects located within Sauna
Side Channel........................................61
Table 8.
Table 9.
Table 10.
A comparison of water surface elevations
from Task 36 transects located within
Sunset Side Channel.:.
A comparison of water surface elevations
from Task 36 transects located within
Trapper Creek Side Channel .
Summary of monthly mean,maximum and
mlnlmum discharges at Sunshine (USGS
15292780).
70
82
86
Table 11.Initial breaching discharge,controlling
discharges and the corresponding
streamflows for the 1984 Task 36 study
sites 88
Table 12.Summary of the extent of backwater and the
corresponding ranges of mainstem discharge .
iv
90
LIST OF FIGURES
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Task 36 study site locations •..•••••••.•.•••.••.•.••
Overview of Island Side Channel (RM 63.2).•.•..••.••
Location of Island Side Channel study site
(RM 63.2).
Island Side Channel streamflow vs WSEL at
transect 1 (Q Site).
Island Side Channel streamflow vs WSEL at
transect 6 (0 Site)••••.••••.••••.••.•••..•••.....••
Island Side Channel transect 1 (0 Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780)...•••....••.•.•.•..
Is1 and Si de Channel transect 6 (Q Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780)..••••..•..•.•....••
Comparison of rating curves for Island Side
Channel transect 6 (Q Site)••.•..•..••••.•.•••.•..••
Overview of Mainstem West Bank Side Channel
(RM 74.4)and Circular Side Channel (RM
75.3).
Location of Mainstem West Bank Side Channel
study site (RM 74.4)•.••••••.•.••.•••••••.•••..•••••
Mainstem West Bank Side Channel streamflow
vs WSEL at transect 1 (Q Site)••••..••••••.••....•..
Mainstem West Bank transect 1 (0 Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780)••••••••••.••••.••••
Cornpari son of rating curves from Ma instem
West Bank Side Channel transect 1 (Q Site)•••...•••.
Location of Circular Side Channel study
site (RM 75 ..3)~.
Circular Side Channel streamflow vs WSEL at
transect 1 (0 Site)••••....••.••.•.•....••••••..••••
Circular Side Channel transect 1 (Q Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780)••••••••••••••••••••
v
3
13
14
16
17
18
19
22
28
29
31
32
34
40
42
43
LIST OF FIGURES (Continued)
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Fi gure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Fi gure 32.
Circular Side Channel streamflow vs WSEL at
transect 4 (Q Site).................................44
Circular Side Channel transect 4 (Q Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (15292780).........................45
Comparison of rating curves from Circular
Side Channel transect 4.............................47
Overview of Sauna Side Channel (RM 79.8)............53
Location of Sauna Side Channel study site
transects (RM 79.8)...~.............................54
Sauna Side Channel streamflow vs WSEL at
transect 2 (Q Site).................................55
Sauna Side Channel transect 2 (Q Site)
streamflow vs Illainstem discharge (cfs)at
Sunshine Station (USGS 15292780)...56
Comparison of rating curves from Sauna Side
Channel transect 2..................................59
Overview of Sunset Side Channel (RM 86.9)...........62
Location of Sunset Side Channel study site
(RM 86.9)....Gl ••ill ()•••ill oil III ...0 •'lI'"l)•S Cl ~.'0 ...,ill I e oil D •G •ill D II!Cl • ••63
Sunset Side Channel streamflow vs WSEL at
transect 1 (Q Site).................................65
Sunset Si de Channel transect .1 (0 Si te)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780)..••....66
Comparison of rating curves from Sunset
Side Channel transect 1.............................68
Overview of Trapper Creek Side Channel (RM
91.6).l)•"•.II II oil ..,'"III ill 1!D Go 0 0 41 Ill'I!I .."'!'II II •73
Location of Trappers Creek Side Channel
stu dy site (RM 91.6)~..............74
Trapper Creek Si de Channel streamflow vs
WSEL at transect 4 (Q Site).........................76
vi
LIST OF FIGURES (Continued)
....
Figure 33.
Figure 34.
Figure 35.
Trapper Creek Si de Channel transect 4 (Q
Site)streamflow vs mainstem discharge
(cfs)at Sunshine Station (USGS 15292780)...•......•
Compa ri son of rati ng curves from Trapper
Creek Side Channel transect 4 .
Susitna River hydrograph for May -October
1981,1982,1983 and 1984 at Sunshine
Station (USGS 15292780)....•........................
vii
77
79
85
LIST OF ATTACHMENT TABLES
Table A-I
Table B-1
Table C-1
Table C-2
Table C-3
Table C-4
Table C-5
Table C-6
Table C-7
Table 0-1
Table 0-2
Table 0-3
Table D-4
Table 0-5
Table D-6
Table 0-7
Oi stance in mil es that a flood wave of a
g~ven magnitude will travel in a given
tlme A-4
Comparison of water surface elevations and
streamflow,measured at Task 36 study
sites,to mean daily mainstem discharge
(cfs)at Sunshine {USGS 15292780)...................B-1
Data used in plotting the thalweg profile
of Island Side Channel..............................C-1
Data used in plotting the thalweg profile
of Mainstem West Bank Side Channel {main
channel)o •••••••••••e •••••••••••••••••••••C-2
Data used in plotting the thalweg profile
of Mainstem \<Jest Bank {east channel)................C-3
Data used in plotting the thalweg profile
of Circular Side Channel............................C-4
Data used in plotting the thalweg profile
of Sauna Side Channel .......•............~..........C-6
Data used in plotting the thalweg profile
of Sunset Side Channel..............................C-7
Data used in plotting the thalweg profile
of Trapper Creek Si de ChanneL......................C-9
Cross sectional profile data obtained at
Island Side Channel transect 1......................0-1
Cross sectional profile data obtained at
Island Side Channel transect 1A.....................0-3
Cross sectional profile data obtained at
Island Side Channel transect 2......................0-5
Cross sectional profile data obtained at
Island Side Channel transect 3......................0-7
Cross sectional profile data obtained at
Island Side Channel transect 4......................D-9
Cross sectional profile data obtained at
Island Side Channel tranSect 4A 0-11
Cross sectional profile data obtained at
Island Side Channel transect 5 0-13
viii
LIST OF ATTACHMENT TABLES (Continued)
.-
-
-
-
Table 0-8
Table 0-9
Table 0-10
Table 0-11
Table 0-12
Table 0-13
Table 0-14
Table 0-15
Table 0-16
Table 0-17
Table 0-18
Table 0-19
Table 0-20
Table 0-21
Table D-22
Table 0-23
Cross sectional profile data obtained at
Island Side Channel transect 6 ........•.............0-15
Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect 1 0-17
Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect 2 0-19
Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect
2A Cl • • • •D-21
Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect 3 0-22
Cross sectional profile data obtained at
Mainstem West Bank Si de Channel transect
3A.••••••. ••••••••••••. •••••••. ••••••••. •. ••••••. . ••0-24
Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect3B..................................................0-25
Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect 4 .•........0-26
Cross sectional profile data obtained at
Circular Side Channel transect 1 •.•.•.........••••..0-28
Cros s sect i ona 1 profi 1e da ta obta i ned at
Circular Side Channel transect 2....................0-29
Cross sectional profile data obtained at
Circular Side Channel transect 2A ....•......•.......0-31
Cross sectional profile data obtained at
Circular Side Channel transect 3 .....•..••......•..•0-33
Cross sectional profile data obtained at
Ci rcul ar Si de Channel transect 4....................0-35
Cross sectional profile data obtained at
Circular Side Channel transect 5....................0-37
Cross sectional profile data obtained at
Sauna Side Channel transect 1 ...........•............0-39
Cross sectional profi le data obtained at
Sauna Side Channel transect 2..0-40
ix
LIST OF ATTACHMENT TABLES (Continued)
Table 0-24
Table 0-25
Table 0-26
Table 0-27
Table 0-28
Table 0-29
Table 0-30
Table 0-31
Table 0-32
Table 0-33
Table 0-34
Table 0-35
Table 0-36
Cross sectional profile data obtained at
Sauna Side Channel transect 3.......................0-41
Cross sectional profile data obtained at
Sauna Side Channel transect 4 0-42
Cross sectional profile data obtained at
Sunset Side Channel transect 0......................0-43
Cross sectional profile data obtained at
Sunset Side Channel transect 1 0-45
Cross sectional profile data obtained at
Sunset Si de Channel transect 2......................0-47
Cross sectional profile data obtained at
Sunset Side Channel transect 3 0-49
Cross sectional profile data obtained at
Sunset Side Channel transect 4......................0-51
Cross sectional profile data obtained at
Sunset Side Channel transect 5 0-53
Cross sectional profile data obtained at
Sunset Side Channel transect 6......................0-55
Cross sectional profile data obtained at
Trapper Creek Side Channel transect 1 ......•........0-57
Cross sectional profile data obtained at
Trapper Creek_Si de Channe 1 transect 2...............0-59
Cross sectional profile data obtained at
Trapper Creek Side Channel transect 3 0-61
Cross sectional profile data obtained at
Trapper Creek Side Channel transect 4 ......•........0-63
x
LIST OF ATTACHMENT FIGURES
-
Figure A-I
Figure C-1
Figure C-2
Figure C-3
Figure C-4
Figure C-5
Figure C-6
Figure 0-1
Figure D-2
Figure 0-3
Figure 0-4
Figure 0-5
Lower Susitna River Basin lag times
referenced to Sunshi ne Stati on...•..•.•.. . ...•. .... .A-5
Thalweg profile of Island Side Channel
study site..........................................C-10
Thalweg profile of Mainstem West Bank Side
Channel study site..................................C-l1
Thalweg profile of Circular Side Channel
study site..........................................C-12
Thalweg profile of Sauna Side Channel study.
site.. ..... . . . ......... ......... . . . .... . . .... . . . .....C-13
Thalweg profile of Sunset Side Channel
study site..........................................C-14
Thalweg profile of Trapper Creek Side
Channel.............................................C-15
Cross sectional profile obtained at Island
Si de Channel transect 1.............................0-65
Cross sectional profile obtained at Island
Side Channel transect 1A............................0-66
Cross sectional profile obtained at Island
Side Channel transect 2.............................0-67
Cross sectional profile obtained at Island
Side Channel transect 3 ............•.......•........0-68
Cross sectional profile obtained at Island
Side Channel transect 4 ....·........................•0-69
Figure 0-6.Cross sectional profile obtained at Island
Side Channel transect 4A............................0-70
Figure 0-7
Figure 0-8
Cross sectional profile obtained at Island
Side Channel transect 5 •...•.........•••............0-71
Cross sectional profile obtained at Island
Side Channel transect 6 .........•...................0-72
Figure 0-9 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 1 0-73
Figure 0-10 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 2 .....•....0-74
xi
LIST OF ATTACHMENT FIGURES (Continued)
Figure 0-11 Cross sectional profile obtained at
Mainstem vlest Bank Side Channel transect
2A ..o "IIlOli ••••••••••,.••IP •••••••••••••••••••••0-75
Figure 0-12 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 3 0-76
Figure 0-13 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect
3A ...D ..." ".."..." •"oil .."....." "oil".." " • " " ".." "......"....."•••" " "oil..0-77
Figure 0-14 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect
38 0 0-78
Figure 0-15 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 4 0-79
Figure 0-16 Cross sectional profile obtained at
Circular Side Channel transect 1.0-80
Figure 0-17 Cross sectional profile obtained at
Circular Side Channel transect 2....................0-81
Figure 0-18 Cross sectional profile obtained at
Circular Side Channel transect 2A...................0-82
Figure 0-19 Cross sectional profile obtained at
Circular Side Channel transect 3....................0-83
Figure 0-20 Cross sectional profile obtained at
Circular Side Channel transect 4....................0-84
Figure 0-21 Cross sectional profile obtained at
Circular Side Channel transect 5 0 •••••••••••••0-85
Figure 0-22 Cross sectional profile obta"ined at Sauna
Side Channel transect 1.......•.....................0-86
Figure 0-23 Cross sectional profile obtained at Sauna
Side Channel transect 2 0-87
Figure 0-24 Cross sectional profile obtained at Sauna
Side Channel transect 3 0-88
Figure 0-25 Cross sectional profile obtained at Sauna
Side Channel transect 4 0-89
Figure 0-26 Cross sectional profile obtained at Sunset
Side Channel transect 0 0-90
xii
-
.....
LIST OF ATTACHMENT FIGURES (Continued)
Figure 0-27 Cross sectional profile obtained at Sunset
Side Channel transect 1.............................0-91
Figure 0-28 Cross sectional profile obtained at Sunset
Side Channel transect 2..............•..............0-92
Figure 0-29 Cross sectional profile obtained at Sunset
Si de Channel transect 3.............................0-93
Figure 0-30 Cross sectional profile obtained at Sunset
Si de Channel transect 4.............................0-94
Figure 0-31 Cross sectional profile obtained at Sunset
Side Channel transect 5 ..•..............•...........0-95
Figure 0-32 Cross sectional profile obtained at Sunset
Side Channel transect 6.............................0-96
Figure 0-33 Cross sectional profile obtained at Trapper
Creek Side Channel transect 1.......•.......•.......0-97
Figure 0-34 Cross sectional profile obtained at Trapper
Creek Si de Channel transect 2.......................0-98
Figure 0-35 Cross sectional profile obtained at Trapper
Creek Side Channel transect 3.......................0-99
Figure 0-36 Cross sectional profile obtained at Trapper
Creek Side Channel transect 4 0-100
-
Figure E-1
Figure E-2
Figure E-3
Figure E-4
Figure E-5
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect 1
(Q Site)'....... ....... . . . . . .... . . .E-1
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect
lA(QSite)E-2
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect 2
(Q S;te ).... . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-3
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect 3
(0 Site).......E-4
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect 4
(Q Site)..E-5
xiii
LIST OF ATTACHMENT FIGURES (Continued)
Figure E-6
Figure E-7
Fi gure E-8
Figure E-9
Figure E-10
Figure E-11
Figure E-12
Figure E-13
Fi gure E-14
Fi gure E-15
Figure E-16
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect
4A (Q Site)e •••••••••••••••••e E-6
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect 5
(Q Site)............................................E-7
WSEL versus mainstem discharge (USGS
15292780)at Island Side Channel transect 6
(Q Site)............................................E-8
WSEL versus mainstem discharge (USGS
15292780)at Mainstem West Bank Side
Channe 1 transect 1..................................E-9
WSEL versus mainstem discharge (USGS
15292780)at Mainstem West Bank Side
Channel transect 2 E-10
WSEL versus mainstem discharge (USGS
15292780)at Mainstem West Bank Side
Channel transect 2A E-l1
WSEL versus mainstem discharge (USGS
15292780)at Ma i nstem West Bank Si de
Channel transect 3 .....•........•...................E-12
WSEL versus mainstem discharge (USGS
15292780)at Ma i nstem West Bank Si de
Channel transect 3A E-13
WSEL versus mainstem discharge (USGS
15292780)at I~ainstem West Bank Side
Channel transect 3B .........•.......................E-14
WSEL versus mainstem discharge (USGS
15292780)at Mainstem West Bank Side
Channel transect 4 ..........••......................E-15
WSEL versus mainstem discharge (USGS
15292780)at Circular Side Channel transect
1 (Q Site).........•................................E-16
Figure E-17 WSEL versus mainstem discharge (USGS
15292780)at Circular Side Channel transect
2...................................................E-17
Figure E-18 WSEL versus mainstem discharge (USGS
15292780)at Circular Side Channel transect
2A .,.."..ill E-18
xiv
-
LIST OF ATTACHMENT FIGURES (Continued)
Figure E-19 WSEL versus mainstem discharge (USGS
15292780)at Circular Side Channel transect
3 ....""•".."""".."""""......"""...""""""""•""".."""..""".."""""E-19
Figure E-20 WSEL versus mainstem discharge (USGS
15292780)at Circular Side Channel transect
4 (Q Site)"""....""..........""""""""".."""..""...."".."..""""...."E-20
Fi gure E-21 WSEL versus mainstem discharge (USGS
15292780)at Circular Side Channel transect
5.. .. . . . .. .. •.. .. . . . . .. .. . .. . . . . . .. . . . .. . . . . . . . . . . ..E-21
,...,Figure E-22 WSEL versus mainstem discharge (USGS
15292780)at Circular Side Channel head E-22
Figure E-23 WSEL versus mainstem discharge (USGS
15292780)at Sauna Side Channel transect 1 E-23
Figure E-24 WSEL versus mainstem discharge (USGS
15292780)at Sauna Side Channel transect 2
(Q Site)"E-24
Figure E-25 WSEL versus mainstem discharge (USGS
15292780)at Sauna Side Channel transect 3 E-25
Figure E-26 WSEL versus mainstem discharge (USGS
15292780)at Sauna Side Channel transect 4 E-26
Figure E-27 WSEL versus mainstem discharge (USGS
15292780)at Sunset Side Channel 'transect
O.. .. . .•. .•. . . . .. .•. . .. . . . . . .. . . . .. . . . .. . . . . . . . . .•.. E-27
Figure E-28 WSEL versus mainstem discharge (USGS
15292780)at Sunset Side Channel transect 1
(Q Site)00 ••••••••••E-28
Figure E-29 WSEL versus mainstem discharge (USGS
15292780)at Sunset Side Channel transect
2...................................................E-29
....
Figure E-30 WSEL versus mainstem discharge (USGS
15292780)at Sunset Si de Channel transect
3"" " " """• " " " ".." " "..".."• " "..".." "• "" " " " " "" " " " ".." " " "" " ".."E-30
Figure E-31 WSEL versus mainstem discharge (USGS
15292780)at Sunset Side Channel transect
4".."""""""".."..""..""" """ ".."".." ".."""" "".."...." ""•"..".."""E-31
xv
LIST OF ATTACHMENT FIGURES (Continued)
Figure E-32 WSEL versus mainstem discharge (USGS
15292780)at Sunset Si de Channel transect
5.. . .. . . . .•. . .. . .. .. . .. .. . . . .. . .. .. . . .. . . .. . . . . .. . . .E-32
Figure E-33 WSEL versus mainstem discharge (USGS
15292780)at Sunset Si de Channel transect
6 ...............................•........."E-33
Figure E-34 WSEL versus mainstem discharge (USGS
15292780)at Trapper Creek Side Channel
transect 1..........................................E-34
Figure E-35 WSEL versus mainstem discharge (USGS
15292780)at Trapper Creek Side Channel
transect 2..........................................E-35
Figure E-36 WSEL versus mainstem discharge (USGS
15292780)at Trapper Creek Side Channel
transect 3..........................................E-36
Figure E-37 WSEL versus mainstem discharge (USGS
15292780)at Trapper Creek Side Channel
transect 4 (Q Site)E-37
xvi
,-
-
-
-
-
1.0 OBJECTIVES OF STUDY
The primary objective of this study was to provide hydraulic support to
the Task 36 lower river Instream Flow Incremental Methodology (IFI~t)
rearing habitat modelling study.Correspondingly,the specific
objectives of the study were:1)to evaluate the response of stage and
streamflow at Task 36 study sites to changes in mainstem discharge,2)
eto describe the general characteristics of each Task 36 study site,3)
to describe the ifilitial and controlling breaching discharges for each
Task 36 study site,and 4)to describe the backwater conditions present
within each Task 36 study site as a function of mainstem discharge.
The information presented in thi s study wi 11 then be used by Task 36
personnel to quantify,via an IFIM habitat modelling approach,changes
in rearing habitat as a function of changes in discharge.
1
2.0 METHODS
2.1 Site Selection
The Task 36 study sites are presented in Table 1 and Figure 1.These
sites were selected by Task 36 study personnel to meet the specific
study objectives of Task 36.Refer to the Task 36 summary report for
the criteria used to select these study sites.
Table 1.Task 36 study sites supported by the Physical Description
Support Program.
Study Site
Island Side Channel
Mainstem West Bank Side Channel
Circular Side Channel
Sauna Side Channel
Sunset Side Channel
Trapper CreekSide Channel
2.2 Field Data Collection
River Mile
63.2
74.4
75.3
79.8
86~9
91.6
Stage.discharge.and channel geometry data were collected at each study
site to evaluate the effect that mainstem discharge has on stage,
streamflow,and backwater.Specific methods used in the field
collection of these data are described below:
2
-
ALASKA
o 10
LI__...,.,..__...J1
miles
....._..
INLET
TRAPPER CREEK
SlOE CHANNEL
SUNSET
SlOE CHANNEL
-I
j
-I
!
-
Figure _1._,Task 36 study site locations.
-
3
2.2.1 Stage
Stage (water surface elevations)data were obtained from staff gage
measurements and surveyed water surface elevations.The specific
procedures for obtaining stage data are presented in the ADF&G
procedures manual (ADF&G 1984).~Iater surface elevations (WSEL)were
determined from staff gage observations and are relative to the
temporary bench mark (TBM)established for each study site.Because
each TBM was assigned an elevation of 100.00 (feet),the resultant water
surface elevations are relative to 100.00 feet and are not "true water
surface elevations"tied into project datum.
2.2.2 Streamflow
Streamflow measurements were co 11 ected from streamflow stati ons located
within 'each of the study sites.These streamflow stations were located
on selected IFIM habitat modelling transects.Standard USGS streamflow
techniques employing either Price AA or Pygmy flow meters were used to
obtain the streamflow (discharge)measurements.In order to develop
rating curves,stage measurements were also obtained at the time of each
streamflow measurement.Specific procedures utilized in obtaining
discharge measurements are described in the ADF&G procedures manual
(ADF&G 1984).
4
-
-
-
-
-
....
-
-
2.2.3 Channel Geometry
Thalweg and cross section profiles were determined at each Task 36 study
site.
2.2.3.1 Thalweg Profile
Tha 1weg profil es were determi ned for each of the Ta sk 36 study sites.
These thalweg profiles represent the "best"determination of the channel
thalweg by the visual assessment of field crews.Surveying for the
development of the thalweg profile began at either the mouth of the side
channel or the first hydraulic control downstream of the study site
!ii
after which the survey continued upstream to the first hydraulic control
above the study site or to the head of the side channel.Thalweg data
were collected using the standard surveying techniques of differential
leveling with significant morphological features selected as thalweg
points (i.e.~riffles~pools).At each of the thalweg points (or
stations)~the streambed elevation~water surface elevation~and
distance between thalweg points was determined.All thalweg elevations
are relative to the assigned elevation of the TBM established at each
study site (100.00 ft).
When applicable,cross section profile data were also used to develop
the thalweg profiles.The lowest elevation obtained from a cross
section profile was compared to the thalweg elevation obtained at the
cross section.When a difference in elevation occurred between the
5
thalweg and cross section profile,the elevation from the cross section
was used.The greatest difference in elevation detected was 0.3 ft.
Specific procedures for the collection of thalweg survey data are
presented in the ADF&G procedures manual (ADF&G 1984).
2.2.3.2 Cross Section Profile
Cross seCtional profiles were determined for each staff gage location
within every Task 36 study site using the standard surveying techniques
of differential leveling.Streambed elevations,water surface ele-
vations,and horizontal distances from bank headpins were obtained for
each cross sectional profile.Specific survey techniques and procedures
IJsed in the collection of cross sectional data are presented in the
ADF&G Procedures Manual (ADF&G,1984).
2.3 Data Analysis
2.3.1 Stage and Streamflow
Water surface elevation (WSEL)data obtained at each staff gage location
were plotted against corresponding mean daily Susitna River discharge as
determined by the United States Geological Survey (USGS)from their
Sunshine gaging station (USGS 15292780).Due to the distance of the
Island Side Channel study site from the Sunshine gaging station,
mainstem discharge values for the plot for the site were determined from
a time lag analysis provided by E.W.Trihey &Associates (see Attachment
A)•
6
For each plot,a least squares regression equation was calculated when
sufficient data were available.At several gage sites,more than one
function was evident on a plot as illustrated by a change in the slope
of the line drawn between the data points.For these cases,separate
regression equations were calculated for each function.These
-
-,
-
-
regression equations enable estimates of water surface elevation to be
determined from the range of USGS mai~stem discharge values included in
the plots.
Water surface elevations 04SEL)obtained from staff gages located at
each streamflow measurement station were also plotted against the
corresponding measured study site streamflow data (Osc)'Several of
the plots have more than one function as illustrated by a change in the
slope of the line drawn between the data points.Under these cases,a
least squares equation is included for each function when sufficient
data was available.These regression equations enable an estimate of
streamflow from observed water surface elevation data.
Plots of measured streamflow (Qsc)versus mean daily mainstem discharge
(Oms)at the USGS Sunshine gaging station (USGS 15292780)were also
developed.These plots include a least squares regression equation for
each function.These equations enable site streamflow to be estimated
from mean,daily mainstem discharge values (USGS 15292780).
7
2.3.2 Initial Breaching and Controlling Discharges
The breaching phenomenon has been partitioned into two discharge events;
an initial breaching discharge and controlling breaching discharge
events.
2.3.2.1 Initial Breaching Discharges
The mainstem discharge at Sunshine (USGS 15292780)required to initially
overtop the head portions of each Task 36 study site is referred to as
the tlinitial breaching discharge".This discharge was determined by
field observations and aerial photographs and is referenced to mean
daily discharges as recorded at Sunshine.
2.3.2.2 Controlling Breaching Discharge
As progressively higher levels of mainstem discharge overtop the head
portion of the study site the hydraulic conditions of the site become
governed by mainstem discharge.The mainstem discharge at which the
hydra~lics become governed by mainstem discharge is referred to as the
controlling breaching discharge.
To determine the controlling breaching discharge of each study site,the
WSEL vs Oms plots were evaluated to identify changes in the relationship
between stage and mainstem discharge from base flow conditions
(unbreached conditi on)to the controll ed breached conditi on.The base
8
-
~
I
-
-
-
flow or unbreached condition is generally characterized in these plots
as having minimal change in stage (WSEL)over a relatively large range
of mainstem discharge whereas the controlled breached condition is
generally characterized by larger changes in stage (WSEL)over
corresponding increases in mainstem discharges.The initial point where
stage begins to increase in proportion to corresponding increases in
mainstem discharge is the controlling discharge.
Stage data is not always available at the point that the hydraulic
condition is initially controlled by mainstem discharge.Therefore,a
combined interpretation of stage data from each staff gage location in
the study site,as well as a knowledge o'f the initial breaching dis-
charge,are used to arrive at controlling breaching discharges.
2.3.3 Backwater
A generic analysis of backwater was performed for each study site
util i zi ng avai 1abl e stage and channel geometry data.For the purposes
of this report,a backwater area is defined as a water surface having
the same or very similar water surface elevation between two or more
points of measurement.Backwater was not strictly evaluated on the
basis of water velocity.
To determine backwater conditions,a table of the 1984 stage data for
each study site was formatted to all ow compari sons of water surface
elevations oVer corresponding mainstem discharges for each of the staff
9
gage locations in the study site.The thalweg profile for the study
site was also used to estimate the 1 inear extent of the backwater at
each study site.
2.3.4 Channel Geometry
Channel geometry data collected in support of Task 36 included both
thalweg and cross sectional profile data.
2.3.4.1 Thalweg Profile
Thalweg profiles consist of a series of streambed and water surface
elevations determined for the deepest part of the stream channel,at the
time of the survey,traversing the length of the study site.\lJater
surface elevations were determined by adding the water depth at the
thalweg point to the elevation surveyed for the thalweg point.Water
was not always present at the time of the thalweg survey,and therefore
may be absent from the thalweg profile.When available,streamflow were
measured on the same date as the thalweg survey.In some instances,
streamflow measurements could not be obtained due to low flow conditions
and the flow was estimated.In either case,base flows are indicated on
the thalweg profile.
Streambed gradients were determined for each thalweg by dividing the
difference between the thalweg elevation of the downstream portion of
the thalweg profile"and the thalweg'elevation of the upstream portion,
by the distance between these two points.
10
-
r
i
-
-
Thalweg profiles are used in hydraulic simulation modeling of Task 36
study sites to determine the point of zero flow (PZF)for each transect
selected for the model and to evaluate backwater effects.
2.3.4.2 Cross Section Profile
Cross section profiles consist of a series of elevations perpendicular
to the stream channel,beginning from the left bank (looking upstream)
and continuing to the right bank,including all major changes in channel
topography.As such,cross section data -collected in this study were
graphed as streambed elevations versus horizontal distance.
Cross sectional profiles are used to support modelling studies and to
assist in determining the hydraulic conditions governing the study site.
They were also used to assist in determination of the lowest channel
elevation in developing thalweg profiles.
11
3.0 RESULTS
The results of these studies are presented below by study site.For
each study site a general description is presented along with a
di scussi on of the hydraul ic and channel geometry conditi ons that were
observed at the study site during the 1984 open water field season (May
-October,1984).
3.1 Island Side Channel (RM 63.2)
3.1.1 Site Description
Island Side Channel is located on the east bank of the main channel,of
the Susitna River at river mile (RM)63.2 (Figure 2).This side channel
is located downstream of a braided,vegetated floodplain and is not
directly connected to the main channel Susitna River.It is approxi-
mately 0.7 miles in length with both the mouth and head portions adjoin-
ing side channel networks.Breaching flows in this side channel result
from overtopping of the head by an adjoining larger sideochannel.Prior
to breaching,side channel flow is greatly reduced with a series of
pools remaining.
During the 1984 open water field season,the study site selected for
Island Side Channel was approximately 750 feet in length and was located
in the lower portion of the side channel (Figure 3).Stage was
monitored at eight locations in the side channel with streamflow being
12
13
a;&L!I·~"""·1E9RiverMile,
0...,__~~2 ....0JOO ~1
~,.J
Figure 3.
0
0
10
~
CJl -lIS 0C'~-(0-C
lIS as-..
(/)...
<J
:;,-.0
\
Location of Island Side Channel study site
(RM 63.2).
14
measured at two of these stage monitoring stations.Cross section
survey data were obtained at each stage monitoring station (staff gage
site).Survey data for the development of a thalweg profile were
collected for that portion of the side channel beginning at the
confluence of the adjoining side channel and terminating at the first
hydraulic control above the study site.
3.1.2 Stage/Discharge Relationship
Measurements of water surface elevations obtained at each stage moni-
toring station located in Island Side Channel along with the mean daily
mai nstem di scharges at Sunshi ne (USGS 15292780)correspondi ng to the
date of the stage measurements are presented in Attachment Table 8-1.
Plots of these water surface elevations versus mainstem discharges are
presented in Attachment Figures E-1 to E-8.
Measurements of streamflow were obtained at two stage monitoring
stations located on modelling transects 1 and 6.These measurements of
streamflow and the corresponding water surface elevations and mainstem
discharges (USGS 15292780)are presented in Attachment Table 8-1.Plots
of these streamflows versus water surface elevations developed as rating
curves are presented in Figures 4 and 5.In addition,the streamflow
data was plotted against mean daily mainstem discharge as rating curves
(Figures and ).
15
~I SlRNO SICE (J-lMNNEL TR 1 (Q SITE:)
RM 63.2
GPGE 06:3.2S I
~10-0.2225 (WSEL _89)4.3246
°sc
r 2 =0.82
'"
WSC:L.(+6'3 f~T)
Figure 4.Is 1and Si de Channel streamflow vs WSEL at
transect 1 (Q Site).
16
~
I
---.{
~ISLAND SIDE CHRNNCL TR 6 (Q SITE)
RN 63.2
GFCE:061.256
Q •10.0.2435 (WSEl _89)4.2232sc
r 2 •0.99
~5EL (+Ir3 ra;n La
-
Figure 5.Island Side Channel streamflow YS WSEL at
transect 6 (Q Site).
17
~ISl-flf£l SHE 0i'1NNU.TR 1 (0 SLIT)
~63.2
GFGl:06'3.2S 1
O~16.2201 Q 3.9630Qsc..1 illS
r 2 ..0.89
lOOMRINSTEMQISCH~~~RT SUNSHr~(lQOOCr5)
18
-I
~,
f"""
I
-
-
~lSl.fI~SIrE rHlNNEL TR 6 (Q SITEJ
RN 63.2
EiFGE CE3.2S6
-15.6019 n 3.8379
Q =10 ""InSSC
r 2 '"0.94
10Cl:l
-
Figure 7.Island Side Channel transect 6 (0 Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780).
19
3.1.3 Mainstem Breaching and Controlling O"ischarges
Breaching of Island Side Channel is the result of overtopping of the
head by an adjoining side channel.Based on aerial photograph
interpretation (Table 2),the lowest mainstem discharge that has been
observed to breach this side channel is 36,600 cfs (USGS 15292780).
Based on a review of Attachment Figure E-8,it has been determined that
at mainstem discharges exceeding 35,000 cfs the hydraulics within this
side channel are directly controlled by mainstem discharge.Following
35,000 cfs the water surface elevation at transect 6 increases
dramatically with corresponding increases in mainstem discharge.The
controlling discharge of 35,000 cfs is lower than the observed breaching
discharge of 36,600 cfs as determined from aerial photography indicating
that this side channel initially breaches below a mainstem discharge of
35,000 cfs.Insufficient field data is available to determine precisely
the initial breaching discharge for Island Side Channel.The initial
breaching discharge for this side channel has been estimated as
occurring approximately 1,000 cfs below the controlling discharge,or at
34,000 cfs.To evaluate the influence mainstem discharge has on the
hydraulic conditions of this side channel,a comparison of the rating
curves for transect 6 (Figure 8)was performed.Transect 6 is one of
the two streamflow stations located at this side channel with the other
being transect 1.Trans~ct 6 was used for this comparison as the stage
versus streamflow relationship is better defined for this transect than
it is at transect 1 under both the breached and unbreached conditions.
20
Table 2.A comparison of 1984 observations used to determine the initial breaching mainstem
discharage at Task 36 study sites.
Location
Is 1and
Side Channel
Mainstem
West Bank
Side Channel
Circular
Side Channel
Sauna
Side Channel
Sunset
Side Channel
Trapper
Side Channel
RM
63.2
74.4
75.3
79.8
86.9
91.6
Date
840915'
840831
830906
840930
840926
830916
841001
840830
840902
830906
830916
840830
840914
830906
840902
830906
B30916
840822
840911
830906
830916
Head
Condition
Dry
Breached
Barely Breached
Dry
Barely Breached
Breached
Dry
Breached
Dry
Breached
Dry
Barely Breached
Dry
Almost Breached
Barely Breached~
Breached
Dry
Breached
Dry
Breached
Dry
USGS
Mean,Dai ly
Discharge
at Sunshine
(cfs)
22,300
38,000136,600
17,800
19,000122,100
18,700
40,800
32,00°1
36,600 122,100
40,800
24,00°1
36,600
32,00°1
36,6°°1
22,100
54,300
23,5°°1
36,6°°1
22,100
Source of
Observation
Field observation
Field observation
Aerial photograph
Field observation
Field observation
Aerial photograph
Field observation
Field observation
Field observation
Aerial photograph
Aerial photograph
Field observation
Field observation
Aerial photograph
Field observation
Aerial photograph
Aerial photograph
Field observation
Field observation
Aerial photograph
Aerial photograph
!~
Mean,daily discharge at Sunshine during this period of aerial photography (R &M
Consultants 1/28/85).
21
t
I
len,...
Ic;i
I~
I~
I~
0=43.5 cfs
0cc •10-0.20)5 (lISEL •89)'.un
rl a O~99
-,-
Q •10.15 •6019 0..).a)79
.c
.2 •0.94
I
I-E
Ig
'I~
I~
1°
I
-..
t
COtllROlLED
lS.ooO ~0 :!:66.700 cr.
WSEL •10'0."S4 ol.CI8n •89
,,2 ..o.~
ISLAND SIDE CHANNEL TR6
GAGE 63.2S6
11.800 ~Q :!:)5./100 of<
~Et •10.0.07910°.11<2.19
.2 •0.99
-,=-.---..-.......-.-~.........-.-:::,,"':------.....-.........-............":'.
"~!~n"or:lC""OGt "T 'iXl"I'-C 1l000tT'i1
Fi gure 8 Comparison af rating curves for Island Side
Channel transect 6 (0 Site).
22
r
.....
A side channel streamflow estimate of 43.5 cfs has been estimated to
occur at the controlling discharge of 35,000 cfs at transect 6 as
determined from the stage versus streamflow rating curve (Figure 5).
This estimated flow is lower than the streamflow estimate derived from
the Transect 6 streamflow versus mainstem discharge rating curve (68.8
cfs)presented in Figure 7 for the mainstem discharge of 35,000 cfs.A
similar comparison between flow estimates at transect 1 shows the stage
versus streamflow rating curve to yield 47.3 cfs and the streamflow
versus mainstem discharge rating to yield 61.4 cfs.Measurements of
streamflow in the 30,000-41,000 cfs range of mainstem discharge are
necessary to validate this relationship.
Table 3 summarizes the estimates of flow as determined from the rating
curves for controlling mainstem discharges.
3.1.4 Channel Geometry
3.1.4.1 Thalweg Profile
Survey data for the development of a thalweg profile were obtained at
Island Side Channel during a non-breaching mainstem discharge of 17,800
cfs when the side channel flow was estimated to be less than 1.0 cfs.
The survey data are presented in Attachment Table C-1 with the resultant
thalweg profile being presented in Attachment Figure 1.The thalweg
profile extends from the mouth of the side channel to a point
approximately 100 feet beyond the first hydraul ic control upstream of
23
Table 3.A comparison of flow estimates
developed from rating curves
discharges.
determined from equations
for controlling mainstem
Rating Curve
Flow Estimate (cfs)
Controlling 1 WSEL vs.Flow vs.
Site Discharge Flow MSQ
Island Side Channel (TR1 )35,000 47.3 61.4
Island Side Channel (TR6)35,000 43.5 68.8
Mainstem West Bank
5.7 2 5.7 2SideChannel(TR 1)19,600
Circular Side Channel (TR1)36,000 23.6 25.4
Circular Side Channel (TR4)36,000 26.8 26.8
Sauna Side Channel (TR 2)38,000 22.5 19.8
Sunset Side Channel (TR 1)32,000 45.8 41.1
Trapper Creek Side Channel 44,000 31.42 31.4 2
(TR 4)
1 The controlling discharge is the mean,daily mainstem discharge at
Sunshine (USGS 15292780)required to govern the hydraul ic
characteristics of side channel and side slough habitats.
2 These stream flow values are actual measurements of discharge and
are not estimated values.
24
"""'
-
---
the study site,approximately 1,500 feet 'upstream of the mouth of the
side channel.Based on the thalweg profile,the gradient \'Jithin the
thalweg profile is 15.6 feet/mile.
3.1.4.2 Cross Section Profile
Cross sectional data were recorded at each of the eight transects
located in Island Side Channel during the 1984 open water season.The
cross sectional data are presented in Attachment Table D-1'with the
resulting cross section profiles presented in Attachment Figures 0-1 to
0-8.
3.1.5 Backwater
Based on a comparison of available 1984 stage (Table 4)and channel
geometry data (Attachment Figure ),an area of backwater extends
through the study site to a point at least 1,100 feet upstream from the
mouth of Island Side Channel at a mainstem discharge of 35,000 cfs.
During mainstem discharges of 38,000 to 66,700 cfs.a large area of
backwater occurs throughout the study site as evidenced by similar water
surface elevations ·over transects 1 to 3 and 4A to 6.This area of
backwater effect results from a hydraulic plug formed by the large side
channel located at the mouth of Island Side Channel.
25
.._------------.-.,---,.,....---------------------
Table 4.A comparison of water surface elevations from Task 36 transects located within Island Side
Channel.
Mainstem
Date TR 1 TR 1A TR 2 TR 3 TR 4 TR 4A TR 5 TR 6 Di scha rge
840930 90.86 90.93 90.88 91.23 91.56 91.56 91.57 91.54 17,800
840927 ------------------91.57 91.56 18,300
840915 ------------------91.59 91.62 22,300
840919 ---91.37 91.33 ---------------28,400
840901 ---91.69 91.68 91.70 91.71 91.77 91.73 91.75 35,000
840831 91.90 91.93 91.89 91.90 91.90 91.94 91.94 91.95 38,000
840719 93.13 ------.------------93.36 51,600
N 840712 93.33 ------------------93.67 54,100
m
840725 93.33 93.46 93.41 93.44 93.62 93.52 93.56 93.55 56,100
840725 93.54 93.56 93.52 93.48 ---93.66 ---93.61 56,100
840725 ---------93.55 ---------93.70 56,100
840704 93.55 ------------------93.84 58,600
840811 93.77 ------------------94.08 60,000
840811 ---------------------94.08 60,000
840801 93.73 93.75 93.74 93.79 93.89 93.93 93.98 94.00 60,300
840626 93.95 ------------ ------94.30 64,800
840626 ---------------------94.31 64,800
840807 94.17 94.16 94.16 94.24 94.34 94.31 94.44 94.40 66,700
3.2 Mainstem West Bank Side Channel (RM 74.4)
3.2.1 Site Description
Mainstem West Bank Side Channel is located on the west bank of the main
channel Susitna River at river mile 74.4 (Figure 9).This side channel
is approximately 2.2 miles in length with both the mouth and head of the
side channel directly connected to the Susitna River.Two heads are
located approximately 1.5 miles upstream of the study site which connect
this side channel to the mainstem.At the study site,th~side channel
is confi ned on the west by a steep bank and on the east by a well
vegetated island which separates it from the mainstem.The upper
portion of the side channel above the study site is separated from the
mainstem by a network of side channels and well vegetated islands.
Within the study site,a minor channel is located on the east bank of
the side channel.During nonbreached conditions,the side channel
primarily consists of series of pools and small riffles.Groundwater
provides the.major contribution of flow prior to breaching of-the head.
During the 1984 open water field season,the study site within this side
channel was approximately 950 feet in length and was located in the
lower portion of the side channel.Stage was monitored at seven
locations,with streamflow measurements collected at only one of these
stage monitoring stations (Figure 10).Cross section survey data were
collected at each stage monitoring station.In addition,survey data
for the development of a thalweg profile were collected from the first
27
_:.:--
Figure 9.
,~....
,•...." .•1,....i"r'
,"
Overview of Mainstem West Bank Side Channel
(RM 74.4)and Circular Side Channel (RM
28
-
\Figure 10",
0
10
CD CN
Q -a:I ()(!)4)t-~-(Q
';C Wa:I
a:I we-..I,L-
(J)t-)(
"'0..
<J Q,
0 Q,
<-
Location of Mainstem West Bank Side Channel
study site (RM 74.4).
29
hydraulic control downstream of the study site to the first hydraulic
control above the study site and through a portion of a minor channel on
the east bank.
3.2.2 Stage/Discharge Relationship
Measurements of water surface elevation obtained at each stage moni-
toring station located in Mainstem West Bank Side Channel along with the
mean daily mainstem discharges (USGS 15292780)corresponding to the date
of the stage measurements are presented in Attachment Table 8-1.Plots
of these water surface elevations versus mainstem discharge are pre-
sented in Attachment Figures E-9 to E-15.
Measurements of streamflow were obtained at one stage monitoring station
located on transect 1.The streamflow measurements and corresponding
water surface elevations and mainstem discharges at Sunshine (USGS
15292780)are presented in Attachment Table B-1.
A rating curve of the streamflow measurements and water surface"
elevations is presented in Figure 11.A rating curve of the streamflow
data plotted against mean daily mainstem discharge is presented in
Figure 12.
30
....
r
....
.-
i
r
~l'""""---------------------------_MAIN5TEN W·B.S.CHAM.TRl fa SllEl
RM 7'9:.1
GRi£07'.'9:51
Q •10-2.8739
sc
r 2 •0.99
....
Figure 11.Mainstem West Bank Side Channel streamflow
vs WSEL at transect 1 (0 Site).
31
10
~-32.6565 n 7.8491.--------Qsc.10 "$'
,,2 •0.89
~MAINSTEM w.e.s.CHAN.rRl tQ SITE)
RM 74:.1
GfGE:011.4,51
1:lO
,.,,,[~tr;rI 0 (SCHRf«if:"T 5UN511 (Nf.:[1 oooen)leal
Fi gure 12.Mainstem West Bank transect 1 (Q Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780).
32
3.2.3 Mainstem Controlling and Breaching Discharges
Breaching of Mainstem West Bank Side Channel occurs as the result of
the mainstem Susitna River overtopping at least one of the two side
channel heads located approximately 1.5 miles upstream of the study
site.Based on field observations,the side channel has been observed
to be barely breached at a mainstem discharge of 19,000 cfs and dry at
18,700 cfs (Table .2).Based on these field observations an initial
breaching discharge of 19,000 cfs has been selected for this side
channel.
To evaluate the influence mainstem discharge has on the hydraulic
condition of this side channel,a comparison of the rating curves for
transect 1 was performed (Figure 13).Based on a review of the stage
versus mainstem discharge rating curve presented in Figure 11,it has
been determined that at mainstem discharges greater than 19,600 cfs the
hydraulics within this side channel are directly controlled by mainstem
discharge.This results from the breaching of one of the two heads of
the side channel.The site flow that occurs at 19,600 cfs was measured
to be 5.7 cfs (Attachment Table B-1).Table 3 summarizes the comparison
of flow estimates determined from rating curve equations for the
controlling mainstem discharge of 19,600 cfs.
At mainstem discharges of both 22,000 cfs and 32,000 cfs,the stage
versus streamflow relationship for transect 1 and several of the
remaining transects was determined to change.These changes ·are
illustrated by changes in the slope of the line in each of the stage
33
°.10-O,SOZ'(\/SEt.901 '.9951--.,
«
r Z •0.99
O.t •10-6 •3745 0..Z.OOZI
.Z •0.99
Q;,5.7 cfs
O,t •10·Z.87J9 {\/SEt·90\8.0018-
.Z •0.99
t-+-Q;,19,600 <:15
I
I~
I~
_"~.__--J\-__""",_"",_~,,,=-__,,,,,,,_,,,,,,,,,,,,-,,,,,,,___-;1-1 --...-IL~:;..----__...-_
"'l""l~~DI:lCHl'IIlOC liT 3~~1e (l11OOl:nJ
8...
!il
t
-NO EOU4TION OEHlOPEO
Nor cr.,UOlL[O
1'.100 oS:0 So 19.600 t'\
'0 (O""lCN "HElOpro
WSEL;,92.85
MAINSTEM WEST BANK SIC TRI
GAGE 74.451
-'o ':lO""[~T(~O['<:"~O<X "!,~~t'<:'IOOOcn,
Figure 13 Comparison of rating curves from Mainstem
West Bank Side Channel transect 1 (Q Site).
34
.....
-
versus mainstem discharge rating curves for these transects (Attachment
Figures E-9 to E-15).Based on field observations these changes are
assumed to result from channel geometry and the diversion of flow
through a small side channel,located upstream of transect 4,away from
Mainstem West Bank side channel.
3.2.4 Channel Geometry
3.2.4.1 Thalweg Profile
The thalweg profile of Mainstem West Bank was surveyed during a
non-breaching mainstem discharge of 14,700 cfs while the site flow was
measured to be less.than 1.0 cfs.Two channels were surveyed;the main
side channel and a smaller channel located on the east bank near the
upper portion of the study site.The thalweg of the main channel was
surveyed from a pool located approximately 329 ft downstream of transect
1 and continued thro~gh the study site to a point approximately 210 ft
above transect 4.The survey data for the main channel thalweg profile
are presented in Attachment Table C-2 with the resultant thalweg prafile
being presented in Attachment Figure C-2.The gradient within the
thalweg profile was 12.3 feet/mile.
The smaller channel thalweg survey began on transect 2 and continued
upstream appr~ximately 600 (ft)including transects 2A,3,and 3B.The
survey data for this thalweg profile are presented in Attachment Table
C-3 with the resultant thalweg profile presented in Attachment Figure
C-2.
35
3.2.4.2 Cross Section Profile
Cross sectional profiles were determined at each of the seven staff gage
locations in Mainstem West Bank Side Channel.Four of these cross
sections extended across the entire study -site (transects 1,2,3 and 4)
whereas two of the transects (transects 2A and 3B)crossed only the east
bank minor channel and one (transect 3A)crossed only the main channel
of the study site.The data obtained for these cross sections are
presented in Attachment Tables 0-9 to 0-15.These resultant cross
section profiles are presented in Attachment Figures 0-9 to 0-15.
3.2.5 Backwater
Based on Table 5 and field observations,backwater did not occur in the
main channel of the study site throughout the 1984 sampling period.
From field observation and a review of the water surface elevations
presented in Table 5,it was determined that a backwater area of
approximately 350 feet was observed in a minor channel adjacent to the
east bank over rnai nstem di scharges rangi ng from 29,000 to 32,000 cfs
(USGS 15292780).The upstream end of this backwater was separated from
the main channel by a gravel bar,whereas the downstream end was
separated from the main channel by an eddy.Water surface elevations in
this backwater area were obtained at transects 2A and 38.
36
c 1 J 1 1 1 1 1 ··1 1 -·1 ...·1 J 1
Table 5.A comparison of water surface elevations from Task 36 transects located within Mainstem West Bank
Side Channel.
Mainstem
Date TR 1 TR 2 TR 2A TR 3 TR 3A TR 3B TR 4 Discharge
841010 92.64 92.63 ---93.03 93.05 ---94.63 14,700
841001 ------------93.37 ------18,700
840925 92.85 ---------93.51 ------19,600
840915 93.90 93.74 ---93.80 94.04 ------22,300
840914 94.12 94.13 ---94.18 94.44 ---95.83 24,000
840903 ------94.90 94.97 95.21 .95.06 96.39 29,000
840920 94.62 94.64 94.67 94.70 94.93 ---96.16 30,500
w 840902 94.94 94.98 94.99 95.04 95.29 ---96.46 32,000'-J
840902 94.97 95.00 ---95.08 95.32 ---96.54 32,000
840817 95.49 95.60 --------- ---
97.22 42,500
840815 .95.56 95.64 ---95.92 ------97.30 46,000
840724 96.02 --------- ---
------55,200
840723 95.98 96.07 ---96.36 ------97.67 56,100
840712 95.96 ------------------54,100
840711 96.01 96.06 ---96.39 ------97.50 55,100
840711 96.08 96.09 ------------97.70 55,100
840721 96.02 96.09 ---96.44 ------97.62 57,700
840721 96.03 96.14 --------- ------57,700
Table 5 (Continued).
Mainstem
Date TR 1 TR 2 TR 2A TR 3 TR 3A TR 38 TR 4 Discharge
840801 96.22 96.31 ---96.67 ------97.90 60,300
840801 96.24 96.32 ---------------60,300
840810 96.49 96.54 ---96.81 --- ---
97.86 66,400
840810 96.54 96.62 ---96.94 ------98.19 66,400
840807 96.49 96.51----96.81 ------97.97 66,700
840827 97.14 ------------------79,700
840827 97.19 ------------------79,700
==-"'~~".
wco
-
3.3 Circular Side Channel (RM 75.3)
3.3.1 Site Description
Circular Side Channel is located on the west bank of the Susitna River
at river mile 75.3 (Figure 9).It is approximately 0.9 miles long and
is separated from the mainstem by a large well vegetated island.Both
the mouth and head of this side channel are connected to the mainstem
Susitna River.An extensive backwater area has been observed to occur
in the lower portion of the study site.A network of small channels at
the head provide mainstem flow into the site after breaching.Prior to
breaching,flow is greatly reduced and the channel is composed of large
pools connected by small riffles.
During the 1984 open water field season,the study site within Circular
Side Channel was approximately 850 feet in length and was located in the
upper half of the side channel.Stage was monitored at six locations
within the study site with streamflow measurements being collected at
two of these stage moni toring stati ons (Fi gure 14).Stage was a 1so
monitored at the head of the side channel.Cross section survey data
were collected at each of the stage monitoring stations except the stage
monitoring station at the head.Survey data for the development of a
thalweg profile were collected beginning at the first hydraulic control
located downstream of the study site and was continued to the head of
the side channel.
39
it-
Figure
~"":~--
\.~.
-":~--.f eireu1arLocatlon03)
5 i te (RM 75..
40
Side
.~--
Y,'-::i:;:lf:
o~
I ._~
.1"""
[
"""
3.3.2 Stage/Discharge Relationship
Measurements of water surface elevations at each stage monitoring
station located in Circular Side Channel along with the mean daily
mainstem discharges (USGS 15292780)corresponding to the date of the
stage measurements are presented in Attachment Table B-1.Plots of
these water surface elevations versus mainstem discharges are presented
in Attachment Figures E-16 to E-22.For transect 4 a gap exists between
the lines depicting the nonbreached and breached condition.This gap is
assumed to be the resul t of channel scour from the August 26 flood
event.
Measurements of streamflow in Circular Side Channel were obtained at two
stage monitoring stations located on transects 1 and 4 (Figure 14).
These measurements of streamflows and the corresponding water surface
elevations and mainstem discharges (USGS 15292780)are presented in
--[Attachment Table B-1.Plots of streamflows versus water surface
elevations developed as rating curves are presented in Figures 15 and
17.Rating curves of the streamflow data plotted against mainstem
discharge are presented in Figures 16 and 18.
3.3.~Mainstem Breaching and Controlling Discharge
Breaching of Circular Side Channel is the result of direct overtopping
of the head by the mainstem Susitna River.Insufficient field data is
available to determine precisely the initial breaching and controll ing
discharge for Circular Side Channel.Field observatins and a review of
41
-CIRCULAR SlOE CHAN.tR I {Q SITE]
~7S.::3
GR'iE 07S.35 1 -
Q ~10-2.1169 (WSEl -85)6.0188
sc
r 2 ~0.99
10-'I,"-------,.......-----------...,.-..,...--~
Figure 15 Circular Side Channel streamflow vs WSEL at
transect 1 (0 Site).
42
-
""'",
,
~CIRCU-~R SlOE CHA~~L TR 4 IQ SITE)
RM 7'5.3
e:G~075.354
Q •10-5.3943 (WSEl _85)9.5838
sc
r 2 •0.98
:zo
,-J--
-1'4--------------------------'10
Fi gure 16 Circular Side Channel streamflow vs WSEL at
transect 4 (0 Site).
43
~CiRCULAR SlOe CHAN.rR 1 (Q SITE)
P.M i"S.J
GFliE G7~.35 1
Q a 10-18.9993 n 4.4782
sc "'lIS
r 2
a 0.97
Figure 17 Circular Side Channel transect 1 (0 Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780).
44
10lD
C_'l"---------------------------.....CIRCU-~R SIDE CHA!~L TR i (Q SIT~J
RM 75.3
rifGE:075.3S~
Q •10-19.1044 n 4.5065
sc "'InS
r 2 •0.99
leal
Figure 18 Circular Side Channel transect 4 (Q Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (15292780).
45
aerial photographs indicate the head of the side channel to be breached
at 36,600 cfs and dry at 32,000 cfs (Table 2).A field observation at
35,000 cfs found the side channel flowing clear indicating a nonbreached
condition although the side channel head was not observed at the time.
Upon close inspection of the aerial photograph at a breaching discharge
of 36,600 cfs the side channel was observed flowing turbid (Pers.Comm.
1984 Bi 11 Ashton;R&M Consultants)indi cati ng a controll ed hydraul ic
condition.Based on this information a controlling discharge of 36,000
cfs is estimated for Circular Side Channel.The initial breaching
discharge of the site is estimated to al so be 36,000 cfs based on the
field observations.
To evaluate the influence mainstem discharge has on the hydraulic
condition of this side channel,a comparison of the rating curves for
transect 4 was performed (Figure 19).Although two streamflow stations
were located in Ci rcul ar Si de Channel (transects 1 and 4),transect 4
was selected for this comparison as it had a greater range of stage
observations than transect 1 and was a better defined rating curve.
The site flow that occurs at a mainstem discharge of 36,000 cfs has been
estimated to be 26.8 cfs based on stage versus streamflow rating curve
for transect 4 (Figure 17).The estimate of 26.8 cfs is the same as the
estimate of streamflow derived from the transect 4 streamflow versus
mainstem discharge rating curve (Figure 18).Table 3 summarizes a
comparison of streamflow estimates determined from equations developed
from both rating curves for controlling mainstem discharges for
transects 1 and 4.
46
Q::26.8 cfs
Q.e.10·19.IOU Q".4.5065
.2 •0."
O.e •10.5.]94](II5El •&51 9.58]8
.2 •0.98
Q::26.8 cfs--------t
I
13
I?:
I~
13=
,.
CIRCULAR SIDE CHANNEL TR4
GAGE 75.354
r
I Iyr-cnNtllOl.LEG
J
l6.QlV'~C ~1'.100 ,f,
W5EL::90.15 v5£L·10.1.]61'0°.4551.85__1
~•·0.98
\lOOt CONTROLlEO
P.roo ~°~16.000 ef.
V\El •10~·ZI0]0°·1055 •A5
.2 •0.'1
_,,!-.-----..r....---~,Z::----------_,4------.....---..--~-_.l-___._......".rtOI~Gl~"1 :S~ltC U000Ct11 ...
G..
-
-,!;-,---...-......_-......._-,...::---...--......--....................-
1lt'[~T~~0[:1:",",,%'IT ,.,eH(t<lloooo;r-,J ...,
Fi gure 19.Comparison of rating eu-rves from Circular
Side Channel transect 4.
4·7
3.3.4 Channel Geometry
3.3.4.1 Thalweg Profile
Survey data for the development of the thalweg profile of Circular Side
Channel was determined during a mainstem discharge of 14,700 cfs (USGS
15292780)when the side channel flow was measured to be 1ess than 1.a
cfs.The thalweg survey extended approximately 2,800 feet beginning
from the confluence of Circular Side Channel with another side channel
and continuing to the head of the side channel (Figure 14).Survey
data used to develop the thalweg profile are presented in Attachment
Table C-4 with the resultant thalweg profile being presented in
Attachment Figure C-3.The gradient within the thalweg profile is 14.3
feet/mile.
3.3.4.2 Cross Section Profile
Cross section data were obtained at each of the six transect locations
within the study site.Survey data from these cross sections are
presented in Attachment Table 0-16 to D-21 with the resultant cross
sectional profiles being presented in Attachment Figures 0-16 to 0-21.
3.3.5 Backwater
Based on available stage data (Table 6)and a review of the thahJeg
profile for Circular Side Channel,backwater has not been observed to
occur during non-breaching mainstem discharges.
48
"1 "1 "I 1 1 "J -"""~}l ]]I 1
Table 6.A comparison of water surface elevations.from Task 36 transects located within Circular Side
Channel.
Mainstem
Date TR 1 TR 2 TR 2A TR 3 TR 4 TR 5 Discharge
841010 ------88.06 ------89.04 14,700
841009 ---------------89.10 15,000
840928 ------------89.54 89.55 17,700
840914 --- ------89.45 89.72 89.73 24,000
840903 ------88.69 89.55 89.85 89.84 29,000
940920 87.87 ---88.67 89.50 89.77 89.76 30,500
940902 ------88.70 89.56 89.84 ---32,000
840830 89.10 89.27 89.33 90.06 90.40 ---40,800
840817 89.25 89.27 89.41 90.17 90.57 ---42,500
.f.::>
U)840817 89.28 89.30 ---90.20 90.60 ---42,500
840724 90.26 90.26 90.28 90.60 91.25 91.32 55,200
840724 90.26 ---90.31 90.67 91.26 91.32 55,200
840724 90.29 ---------91.26 ---55,200
840724 90.30 ------ ---
91.29 ---55,200
840124 90.30 ---------91.30 ---55,200
840710 ------ ---
90.51 91.13 ---52,500
840803 90.23 90.21 90.26 90.62 91.24 ---54,700
840803 90.24 ---------------54,700
840723 90.31 ------90.64 91.26 ---56,100
840811 90.81 90.77 ---91.01 91.58 ---60,000
840811 ------------91.59 ---60,000
Table 6 (Continued).
Mainstem
Date TR 1 TR 2 TR 2A TR 3 TR 4 TR 5 Di scharge
840706 90.70 ------90.92 ------63,600
840706 90.70 ---------------63,600
840706 90.72 ---------------63,600
840824 90.78 90.80 90.81 91.03 91.54 ---64,800
840824 90.78 ---------91.56 ---64,800
840626 90.99 --- ---
91.15 ------64,800
840626 91.00 ------91.21 ------64,800
840807 91.24 91.19 91.18 91.32 91.83 ---66,700
840827 91.75 ---------92.43 ---79,700
(J1 840827 91.82 ---------92.49 ---79,700
0
At breaching mainstem discharges of 55,200 to 66,700 cfs,an area of
backwater was found to occur upstream to a point approximately 90 feet
above transect 2A.Insufficient stage data is available to describe the
extent of backwater for mainstem discharges exceeding 66,700 cfs.At a
mainstem discharge of 42,500 cfs,backwater has been determined to
extend slightly past transect 2.
3.4 Sauna Side Channel (RM-79.8)
3.4.1 Site Description
Sauna Side Channel is located on the west bank of the Susitna River at
river mile 79.8 (Figure 20).It is approximately 0.2 mil€s long.Both
the mouth and head of the side channel are connected to a larger side
channel of the mainstem Susitna River.For the most part,the side
channel is confined on the west by a high bank and on the east by a
large sparsely vegetated gravel bar.A smaller side channel enters just
below the head of Sauna Si de Channel on its west bank.Thi s si de
channel conducts flow to the study site during high mainstem discharges,
but dewaters before the head of Sauna Side Channel becomes unbreached.
Breaching flows result from overtopping of the side channel that adjoins
the head on the east bank of Sauna Si de Channel ..Pri or to breachi ng,
the channel is composed of two large interconnected pools whose water
levels "are maintained from ground water seepage originating from the
vicinity of the head.An extensive log jam exists at the head of Sauna
Side Channel that likely influences the flow into this side channel.
51
During the 1984 open water field season,the study site within this side
channel was approximately 500 feet in length and was located
approximately 2,000 feet from where the mouth of the side channel
confluences with the mainstem.Stage was monitored at four locations
with streamflow being measured at one of these stage monitoring stations
(Figure 21).Cross section survey data were coll ected at each of the
stage monitoring stations.Survey data for the development of a thalweg
profile were collected beginning at the mouth and ending at the head of
the side channel.
3.4.2 Stage/Discharge Relationship
Water surface elevations obtained at each of the stage monitoring
stations located in Sauna Side Channel along with the mean daily
mainstem discharge (USGS 15292780)corresponding to the date of the
stage measurement are presented in Attachment Table B-1.Plots of these
water surface el evati ons versus ma i nstem di scharges are presented in
Attachment Figures E-23 to E-26.
Measurements of streamflow in Sauna Side Channel were obtained at one
stage monitori ng stati on located on transect 2 (Fi gure 21).These
measurements of streamflow and the correspondi ng water surface
elevations and mainstem discharges (USGS 15292780)are presented in
Attachment Table B-1.A plot of these streamflows versus water surface
elevations was developed as a rating curve and is presented in Figure
22.In addition,the streamflow data plotted against mainstem discharge
is presented in Figure 23.
52
FEET
(Approximate Scale)
Figure 20.Overview of
~':~1~:
~-'f~i'{..,;..~
•1 :....,;:""."_r",1'j",.•i
<':.;;,.,./~.
r·".".r .:.''-.-.-, .\l ,I"'N'i -",,'.;I;...,..;,.
Sauna Side Channel (RM 79.8).
500
I
River Mile
o
t
53
FEET
(Approximate Scale)"'r<;.,
Figurp 21.Location.of Sauna Side Channel study
site transects (RM7908)o
54
-
~SA.JNA SHE CIfllNEL !P.2 (11 5 IrE)
Rl1 79.9
GFliE 079.852
Fi gure 22
Q •100.1219 (WSEL _85)2.0592
sc
r 2 •0.92
a
Sauna Si de Channel streamflow vs WSEL at
transect 2 (Q Site).
55
10
el Sfl.lNA 5 ICE CtR'iN£L TR 2 fa sltE:1
Rr1 79.6
GFCE:079.852
Fi gure 23
Q E IO~9.1284 0 2.2766sc~s
,,2 '"0.90
100
Mf'lINS'!CM 0 rSCHARGf:RT ':lJ'r.lHlNE U OOOCl'J)
Sauna Side Channel Transect 2 (0 Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780).
56
......
-
-
3.4.3 Mainstem Controlling and Breaching Discharges
Breaching of Sauna Side Channel is the result of overtopping of the head
by the adjoining side channel.Insufficient field data is available to
determine precisely the initial breaching and controlling discharges for
Sauna Side Channel.Field observations and a review of aerial
photographs indicate the head of the side channel to be Itbarely"
breached at 40,800 cfsand "almost"breached at 36,600 cfs (Table 2).
Although the lowest discharge at which the mainstem was observed to
breach Sauna Side Channel was 40,800 cfs,a controlling discharge of
38,000 cfs is estimated for this channel.This controlling discharge
was estimated by·assuming that the stage/discharge relationship
(Attachment Figure 24)for the nonbreached condition was nearly
horizontal.This assumption is made because of the lack of nonbreached
stage observations (l observation only)and is considered reasonable
based on observations and data collected at this site.The controlling
discharge is scaled from the curve as the point of intersection (38,000
cfs)of thenonbreached limb of the stage/discharge relationship.The
initial breaching discharge is estimated to occur at 37,000 cfs based on
field observations and assuming the site initially breaches within
1,000-2,000 cfs of the controlling discharge as observed at other side
channel sites.
To evaluate the influence mainstem discharge has on the hydraul ics of
Sauna Side Channel,a comparison of the rating curves for the streamflow
57
station at transect 2 was performed (Figure 24).A side channel flow of
22.5 cfs has been estimated to occur at the controlling discharge of
38,000 cfs as deri ved from the stage versus streamflow rati ng curve.
This compares to a streamflow estimate of 19.9 cfs determined from the
streamflow versus mainstem discharge rating curve.Table 3 summarizes
compari sons of streamflow estimates determi ned from transect 2 rati ng
curves for controlling mainstem discharges of Sauna Side Channel.
3.4.4 Channel Geometry
3.4.4.1 Thalweg Profile
Survey data for the development of a thalweg profile were collected at
Sauna Side Channel during a mainstem discharge at Sunshine (USGS
15292780)of 15,000 cfs when the flow within the study site was
estimated to be 1ess .than 1.0 cfs.The thalweg survey extended
approximately 1,450 feet beginning at the mouth of the side channel
conti nui ng upstream through the study site termi nati ng at the head of
the side channel.The survey data used to develop the thalweg profile
are presented in Attachment Table C-5 with the resultant thalweg profile
being presented in Attachment Figure C-4.A gradient of 10.4 ft/mi was
determined for the thalweg profile.
3.4.4.2 Cross Section Profile
Survey data for the development of cross sectional profiles were
obtained at each of the four transects located in Sauna Side Channel.
58
-
'!!!!
I.
Q,c •100.IU9 (IISE~•85)Z.D59Z
r Z •O.JZ
Q =22.5 cfs
SAUNA SIDE CHANNEL TR2
GAGE 79.8S2
--.
Q,c •10·9.IZlI4 0..Z.Z7"
r Z •0.90
r---CONUOlLED
JlI.OOO ~Q :5:17.100 ch
IISE~•10.3•71106 Q.9SSt •as
r Z o.n
lilT ClIITIOlLED
15.000 ~Q ~38.000 cfs
III EllIJlTHlIl DEvnop£o
I'
~-!:l
III
.:.
-l
lIJ
r"r
!:
%
Cl
.:~
1:7~
I:!
-
-
,~,-----------:...::----------~
!"I"'I~~I!'"orx"l"t~"t '1,1-.'1'"'l<IIOO~1
Figure 24 Comparison of rating curves from Sauna Side
Channel transect 2.
-59
The survey data are presented in Attachment Tables 0-22 to 0-25 with the
resultant cross sectional profiles being presented in Attachment Figures
0-22 to 0-25.
3.4.5 Backwater
Based on a revi ew of the 1984 stage data (Table 7)and the thalweg
figure for Sauna Side Channel (Attachment Figure C-4),it has determined
that backwater does not occur in Sauna Side Channel during non-breaching
mainstem discharges.
During breaching discharges of 54,600 to 56,700 cfs,an area of
backwater was observed to occur throughout the Sauna Side Channel study
site.At mainstem discharges exceeding 56,700 cfs,insufficient stage
data is available to determine the extent of backwater.
3.5 Sunset Side Channel (RM 86.9)
3.5.1 Site Description
Sunset Side Channel is located on the east bank of the Susitna River at
river mile 86.9 (Figure 25).It is approximately 1.1 miles in length
and is separated from the main channel Susitna River on the west by a
network of vegetated islands and side channels.The channel is confin~d
on the east by a high cut bank.Prior to breaching,the side channel
is composed of a sequence of pools and riffles.During this period,
60
}-j )}
Table 7.A comparison of water surface elevations from Task 36 transects located within Sauna Side
Channel.
Mainstem
Date TR 1 TR 2 TR 3 TR 4 Discharge
841009 88.75 89.00 88.90 89.02 15,000
840928 ---------89.02 17,700
840914 ---------89.02 24,000
840830 ---------89.39 40,800
840817 89.15 ------89.29 42,500
840710 ---90.24 ------52,500
840823 90.63 90.61 90.64 90.65 54,600
0'1 840723 ---90.71 90.66 90.69 56,100
~
840723 90.70 90.73 90.72 90.69 .56,100
840723 90.72 90.73 90.75 ---56,100
840802 90.73 90.75 90.75 90.79 56,700
840721 ---90.91 ------57,700
840828 ---91.09 ------59,900
840828 ---91.13 ------59,900
840706 ---91.18 ------63,600
840810 ---91.83 ------66,400
840810 ---91.85 ------66,400
840807 ---91.26 ------66,700
840625 ---91.82 ------67,100
840625 ---91.86 ------67,100
Fi gure 25.
-0 .!0 as4)CD 0 (J0)-...r.nas(J ~~4)~~-en ..-c 4)wasasas>wE-..~1.1.-
f/)~)(
0..
<l EB c.
0 c.<-
Overview of Sunset Side Channel (RM 86s4)
and Sunrise Side Channel (RM 87.0).
62
Sunset Side -Channel study site
63
flow is maintained by groundwater seepage and upwelling.Subsequent to
breaching,flows up to 3,900 cfs have been measured.
During the 1984 open water field season,the study site within Sunset
Side Channel was located in the lower portion of the side channel and
was approximately 1,500 feet in length.Stage was monitored at seven
locations with streamflow measurements being obtained at one of these
stage monitoring stations (Figure 26).Cross section survey data were
collected at all stage monitoring stations whereas survey data for the
development of a thalweg profile were collected from the first control
below the study site to the first control above the study site.
3.5.2 Stage/Discharge Relationship
Measurements of water surface elevations obtained at each stage monitor-
ing station located in Sunset Side Channel along with the mean daily
mainstem discharges at Sunshine (USGS 15292780)corresponding to the
date of the stage measurements a re presented in Attachment Tab 1e B-1.
Plots of these water surface elevations versus mainstem discharges are
presented in Attachment Figures E-27 to E-33.
Measurements of streamflow in Sunset Side Channel were obtained at one
stage monitoring station which was located on transect 1 (Figure 26).
These measurements of streamflow and the correspond;ng water surface
e 1evati ons and m-a i nstem di scha rges a re presented in Attachment Tab 1e
B-1.A plot of these streamflows and water surface elevations developed
64
~Si.I~scr SI~O'flNNE:L r~1 <Q SITE'
P.M B6.S
SRjE C8S.951
Q =10-0.5735 (WSEL _90)4.3094
sc
r 2 •0.99
-
-
Figure 27
a
Sunset Si de Cha nne 1 streamflow vs WSEL at
transect 1 (Q Site).
65
10
~SUiSET S£OC:D-flNNEl..lR 1 (Q SIT£)
R!'1 86.9
GRiE G85.95 1
Q ~10-17.7598 n 4.3004
sc "Ins
r 2 ..0.99
IlXlO
Figure 28-Sunset Side Channel transect 1 (0 Site)
streamflow vs mainstem discharge (cfs)at
Sunshine Station (USGS 15292780).
66
.-
f
-,
as a rating curve is presented in Figure 27.These streamflow data
plotted against mainstem discharge as a rating curve are presented in
Figure 28.
3.5.3 Mainstem Breaching and Controlling Discharges
Breaching of Sunset Side Channel results from the direct overtopping of
the head of the side channel by the mainstem Susitna River.Based on
field observations and aerial photography this side channel was found to
be "barely"breached at 32,000 cfs and dry at 22,000 cfs.A review of
the stage data presented in the transect 1 (streamflow station)WSEL
versus mainstem discharge plot (Attachment Figure E-28)indicates that
the hydraulics of Sunset Side Channel be~ome controlled by the mainstem
at a discharge of 32,000 cfs.Based on this controlling discharge and
the limited field observations an initial breaching discharge of 31,000
cfs has been estimated for this side channel.
A comparison of the transect 1 rating curves (Figure 29)has been
developed to evaluate the.influence mainstem discharge has on the
hydraulics of Sunset Side Channel.At the controlling discharge of
32,000 cfs,flow in this side channel has been estimated to be 45.7 cfs.
This compaares to an estimated flow of 41.4 cfs derived from the flow
versus mainstem discharge rating curve.Table 3 summarizes the
"'"'"
comparisons of flow estimates determined from equations developed from
rating curves for controlling mainstem discharges for transect 1.
67
--------._;0;['11__.._._
/
/
t
I
10
l::i
(JlI..
...J
I~(~
0«•10.0.5735 (W5EL -90)•.J09'
r 2 •D.99
Q =45.8 cfs
SUNSET SIDE CHANNEL TRI
GAGE 86.951
n.ooo 5 q i 10C.000 cr,
WSEL •10.3 .7766 ~D.9533 •90
r 2 •D.99
"01 CO"T~OLLED
17,COO So os.32.000 c f ,
W5EL •lOD.U91 00.D155 •'!O
,<•0.57
0"•10.17.7598 0",'.300C
.2 •0.99
t
~Igl
~I
;\
I
Q=41.1 cfs
Fi gure 29 Comparison of rating curves from Sunset
Side Channel transect 1.
-
....
,i
-
i'
-
-
-
3.5.4 Channel Geometry
3.5.4.1 Thalweg Profile
Survey data for the development of a thalweg profil e were obtained ;n
Sunset Side Channel at a mainstem discharge of 17,400 cfs whi le site
flow was measured to be 1.0 cfs.The thalweg profile extended upstream
from approximately 400 feet below the mouth of the side channel through
the study site to a point 2,500 feet into the side channel.The survey
data used to develop the thalweg profile are presented in Attachment
Table C-6 with the resultant thalweg profile being presented in
Attachment Figure C-5.Based on this thalweg profile,a gradient of 9.5
feet/mile was determined for the Sunset Side Channel.
3.5.4.2 Cross Section Profile
Cross section survey data were obtained at each of the seven transects
located in Sunset Side Channel.The survey data are presented in
Attach~ent Table 0-26 to 0-32 with the resultant cross section profiles
being presented in Attachment Figures 0-26 to 0-32.
3.5.5 Backwater
Based on available stage data (Table 8)·and channel geometry data
(Attachment"Figure C-5),a backwater area does not occur in the side
channel during unbreached conditions.
69
Table 8.A comparison of water surface elevations from Task 36 transects located within Sunset Side
Channel.
~-1 Mainstem4
Date TR 0 TR 1 TR 2 TR 3 TR 4 TR 5 TR 6 Discharge
841005 ---------93.74 ---94.75 94.74 16,500
840929 92.70 93.27 93.81 --- ---
94.76 94.75 17,400
840930 ---93.27 93.79 93.69 94.11 94.75 94.75 17,800
840916 ---93.29 93.81 93.87 94.11 94.76 94.76 21,000
840912 ---93.29 93.81 93.78 94.29 94.78 ---22,700
840913 ---93.30 ---------------22,700
840914 ------93.81 93.87 94.31 ------24,000
-.....J 840919 ---93.29 93.80 93.87 94.31 94.76 94.76 28,400
0
840902 --------------- ---
94.88 32,000
840817 ---94.34 ---94.93 95.01 95.99 95.97 42,500
840816 ---------95.02 95.10 96.06 96.05 44,000
840822 95.54 95.53 95.71 95.86 95.93 96.66 96.62 54,300
840803 95.60 95.58 95.68 95.95 95.93 96.72 96.69 54,700
840709 ---95.59 ------95.92 ------55,400
840709 ---95.69 95.94 96.01 96.08 96.79 ---55,400
840723 ---95.58 --- ---
---------56,100
840723 95.58 95.58 95.64 95.85 95.95 96.65 ---56,100
840721 ---95.45 ------.---------57,700
840722 95.09 95.67 95.76 95.86 95.96 96.68 96.64 57,800
840722 95.62 ---.95.78 95.94 95.98 96.68 96.65 57,800
Table.8 (Continued).
1 1,J ··1 J l'l J
.............
~1ainstem
Date TR 0 TR 1 TR 2 TR 3 TR 4 TR 5 TR 6 Discharge
840808 ---96.63 --- --- --- ------65,900
840808 96.67 96.67 ---96.86 96.89 97.31 97.21 65,900
840807 96.68 96.69 ---96.89 96.96 97.36 97.29 66,700
840825 ---99.42 --- --- --- --- ---
93,300
840826 ---99.88 ---------------104,000
At breaching mainstem discharges ranging from 56,000-66,700 cfs,an area
of backwater was observed to extend upstream to approximately 1,100 feet
to a point between transects 1 and 2.Above 66,700 cfs,insufficient
stage data is available to determine the extent of backwater in Sunset
Side Channel.
3.6 Trapper Creek Side Channel (RM 91.6)
3~6.1 Site Description
Trapper Creek Side Channel is located on the west bank of the Susitna
River and is approximately 5.0 miles in length.It is separated from
the mainstem Susitna River by a complex of sand bars,small channels,
and vegetated islands.The head portion of this side channel is located
in a complex of small channels and vegetated islands making it difficult
to identify the origin of breaching flows<Depending upon mainstem
discharge,the mouth of Trapper Creek Side Channel is also difficult to
identify due to the presence of several intersecting small channels.At
low mainstem discharges,the mouth of Trapper Creek Side Channel appears
to extend downstream to river mile 90<3 (Figure 30).Breaching flows in
Trapper Creek Side Channel result from the overtopping of several
overflow channels located throughout the upper portion of the side
channel.Prior to breaching,flows into Trapper Creek Side Channel,are
principally due to Cache Creek and ground water occurring in the upper
reach of the side channel.
72
e.River Mile
o
I
Fi gure 30.Overv;ew of Trapper Creek Si de Channel
91.6).
73
2000
I
o
o
10
'"
<]
CD
Q -CIS U
CJ CD-.._ c
CIS CIS
-a-m I-
~--.:~
\~l:m
\,t~i}~'~~.~...'
-':~~'~\,~5,i,
~('~~
~!
".".,'t!
,
i
i~wwa:o
.-trIUa.a.
'<.~
~j:---"-
.~..;
.~.,
,~.
~
t...:ff
t f·;61~~~-:,_;--__-"':"':
:~:l1
\/
f~j~·-
•<0«'
~.
Fi gure 31.Location of Trapper Creek Side Channel
study site (RM 91.6).
74
During the 1984 open water field season,the study site selected for
Trapper Creek Side Channel was approximately 800 feet in length and was
located in the lower portion of·the side channel (Figure 31).Stage was
monitored at four locations and streamflow was measured at one of these
stage monitoring stations.Survey data for the development of cross
section profiles was obtained from each stage monitoring station.
Survey data for the development of a thalweg profile was obtained for
only that portion of the side channel that included the study site.
3.6.2 Stage/Discharge Relationship
Measurements of water surface elevations obtained at each stage monitor-
ing station located in Trapper Creek Side Channel along with mean daily
mainstem discharges (USGS 15292780)corresponding to the date of the
stage measurements are presented in Attachment Table 8-1.Plots of
these water surface elevations versus mainstem discharge are presented
in Attachment Figures E-34 to E-37.
Measurements of streamflow in Trapper Creek Side Channel were obtained
at one stage monitoring station located on transect 4 (Figure 31).
Measurements of streamflow and corresponding water surface elevations
and mainstem discharges (USGS 15292780")are presented in Attachment
Table 8-1.A plot of these streamflows and water surface elevations
develo~ed as a rating curve is presented in Figure 32.The streamflow
data was also plotted against mainstem discharge as a rating curve and
is presented in Figure 33.
75
~rRAPPER CREEK SIC IF!i:Ul SITEI
RM 91.6
GASE 091.55 1
Q '"100.6037 (WSEL -90)3.6448~sc
r 2 ,"0.98
sco
-r Q ..10-2.0521 (WSEL -90)8.2433 ____-=sc -..,...
:%,,2 '"0.99o
-Ie.r...;2
aw
~
<J'l,a:::
't!
~Q •lO-3.55Z5 (WSEL =90)11.6511
sc
r 2 ..0.84
-l-+--~--------------------------'"10
Figure 32 Tra ppe r Creek Side Cha nne 1
WSEL nt transect 4 (0 Site).
76
streamflow vs
e rRRPPER CREEK SIC TR 'l (Q 51 TE)
RN 91.6
GAGE:091.65 1
---........Q •10.42.5803 n 9.4931sc'......s
r Z •0.99
I-+----QSC.10.15.9591 ~S3.9158
r 2 •0.99
~Q.•10.2.8293 0 .0.9316
sc '......s
r Z •0.99
:cc
""INS Tf:11 0 [~HflRGE RT ::ltJll5H [Nt:(I oooen I
IOCD
"...
Figure 33 Trapper Creek Side Channel transect 4 (0
Site)streamflow vs mainstem discharge
(cfs)at Sunshine Station (USGS 15292780).
77
3.6.3 Mainstem Controlling and Breaching Discharges
Breaching of Trapper Creek Side Channel is the result of the direct
overtopping of the head of the side channel by the mainstem Susitna
River.Based on aerial photography (Table 2),this side channel has
been observed to be breached at a mainstem discharge as low as 36,600
cfs.The controlling mainstem discharge has been estimated from
inspection of the stage versus mainstem discharge rating curve for
transect 4 (Figure 9)to be 44,000 cfs.The mainstem discharge of
44,000 cfs was chosen because it is the point of intersection of the
1 i nes depi cti ng the base flow unbreached conditi on and the breached
conditi on observed at the streamflow stati on (Fi gure 9).Thi s
relationship is also presented in the WSEL versus MS q plots for
transects 2 and 3 (Attachment Fi gures E-35 and E-36).Thi s rna i nstem
discharge corresponds to·a streamflow measurement of 31.4 cfs.
The substanti a 1 differences in rna i nstem di scha rge between the lowest
observed breaching discharge (36,600 cfs)and the estimated controlling
discharge (44,000 cfs)is suspect.Based on observations from other
sites the initial breaching and controlling discharge are usually
similar.The breaching observation corresponding to 36,600 cfs was
determined from a 1983 aerial photograph.Based on the stage/discharge
rel ati onshi ps for the nonbreached and breached conditi on presented in
Attachment Fi gures E-34 to E-37 the i niti a 1 breachi ng and contl~ol1 i ng
discharges for this side channel appear to be similar.Assuming the
initial breaching discharge is less than and occasionally equal to the
78
""'"I
0te'10.2 •8293 llo..0,9316
.2 •0.99
Q =31.4 cfs
° .100.60]1 [WSfl.•901 3.6"8 ~
SC ~
.2 •0.98
0sc •10.2.0521 (WSEt..90)8.2433 ___
.2 •0.99
_osc·IO·IS,9S911l",.3.9IS8
.2.0.99
if ..
~~.."c:0
~I it~..=>
!:...-aI'"'"'"'t'~
i!-D------..........-.....~...~-------...............~__,...------..--.....JI-.--__-.....- -__
I'JIttetCl'DIXtlftIlGt 1fT 3~1IC:llooccnJ "'tL .+'10 FEt!l 10
or=-'
r-
g...
!il
~
....
~
44,000 $Q $93,300 <f,
WSEI.•10·~·9~SS ql.IS6S •90
p2.0.95
"'-.OT (QIlUOUfO
15.000.5:q ~<C.OOO <,_
WSf\.•10°·0801 QO.07S6 •90
.2 •0.83
TRAPPER CREEK SIC TR4
GAGE 91.6S1
-,T------------'"':,..::---......-----.............'"!_
""l,.,tt"o:x""~1fT 31.1'O"1Nt IIOO~'
Fi gure 34 Comparison of rating curves from Trapper
Creek Side Channel transect 4.
79
controlling discharge,therefore at this site initial breaching is
estimated to be 43,000 cfs.
3.6.4 Channel Geometry
3.6.4.1 Thalweg Profile
Survey data for the development of a thalweg profile was obtained from
Trapper Creek Side Channel during a mainstem Susitna River discharge
of 22,700 cfs and a measured side channel flow of 16.4 cfs.The thalweg
profile was initiated approximately 150 feet downstream of the first
control below the study site and extended upstream,through the study
site,approximately 1,600 feet.The survey data used to construct the
thalweg profile are presented in Attachment Table C-7 with the resultant
thalweg profile being presented in Attachment Figure C-6.Based on this
thalweg profile,a streambed gradient of of 12.1 feet/mile was
determined.
3.6.4.2 Cross Section Profile
Cross secti on survey data was obtained at each of the four transects
located in Trapper Creek Side Channel.The survey data used to con-
struct these cross sections are presented in Attachment Tables 0-33 to
0-36.The resultant cross section profiles are presented in Attachment
Figures 0-33 to 0-36.
80
-
-
-
-
3.6.5 Backwater
Based on stage (Table 9)and channel geometry (Attachment Figure C-6)
data!an area of backwater has not been observed during nonbreaching
mainstem discharges.
At mainstem discharges ranging from 15!700 to 22,700 cfs,pooling was
observed at transects I!2 and 3 resulting from the control located
approximately 373 feet downstream from transect 1.During breached
ma i nstem di scha rges,a backwater a rea was not observed to occur in
Trapper Side Channel.
81
Table 9.A comparison of water surface elevations from Task 36 transects located within Trapper Creek
Side Channel.
Mainstem
Date TR 1 TR 2 TR 3 TR 4 Di scha rge
841009 ------92.12 92.50 15,000
841006 91.92 91.90 92.14 92.51 15,700
840930 91.93 91.92 92.14 92.47 17,800
840917 91.95 91.93 92.19 92.53 20,400
840924 91.94 91.93 92.17 92.55 20,400
840918 91.95 91.95 92.18 92.60 20,900
840913 91.97 91.95 92.16 92.56 22,700
840911 ------92.14 92.56 23,500
(Xl 840911 92.58 23,500N---------
840816 92.34 92.00 92.15 92.70 44,000
840822 92.76 92.51 92.82 93.27 54,300
840803 92.93 92.69 93.02 93.18 54,700
840803 ---------93.42 54,700
840708 ---------93.78 57,100
840819 92.90 92.69 93.04 93.23 57,200
840721 93.11 92.96 93.22 93.63 57,700
840721 93.15 93.00 93.32 94.08 57,700
840722 93.06 92.89 93.26 93.61 57,800
840722 ---------93.62 57,800
i I
.Table 9 (Continued).
1 ]-'J 1 )'-'--1 ---1 J
4.0 SUMMARY
The stage,discharge,and channel geometry data presented in this
technical memorandum is the result of field investigations conducted
from May to October,1984.During this period,mean daily Susitna River
discharge at the USGS Sunshine gaging station (USGS 15292780)ranged
from a low of 6,000 cfs in May to a high of 104,000 cfs in August.A
review of the hydrograph developed from mean daily discharges recorded
at Sunshine for the period of record (Figure 35)shows that daily flow
during the 1984 open water field season generally followed previous
years trends with the exception that September were somewhat drier than
previous years when the monthly means are compared (Table 10).
Based on evaluation of stage data collected at each study site during
both the nonbreached and breached hydraulic conditions mainstem
discharge was found to influence the hydraulic conditions of each of the
Task 36 side channel study sites.At Island,Circular,Sunset,and
Trapper Creek Side Channels sufficient data were obtained for the
development of rating curves describing the relationship between
mai nstem di scharge and study site water surface el evati ons duri ng the
unbreached hydraulic condition.This portion of the WSEL versus
mainstem discharge rating curve is characterized by a regression line
having little or no sope over incremental increases of mainstem
discharge.Due to limited data,however,this portion of the rating
curve has not been firmly established for any of these sites.
84
)
~5HIt£-1981
.....~..
OCTSEPAUGJUL
j..,
J
!;
t ~..::"
:II
:'\::U ..1'..I ,.(.,,
'"•I
.:I \:'.'' : I I I I,:i~:..~.V'\:~
:f (;~J':"-:'\::I::,:'.:.:I,
:~\I,f.~:\J \i)~1"::~'..",,'\,.,:i :'~j ~f :.:'\=\ :~.•.••.t ..7\./.:t!:.:.,\.I..,.'-,"",,:....~....J\".'":.,.\(':',':\f\·~""",•...~~;'.,\
v V "~.'".,
'"-'~"t:i'~I \f::"'..,\'.,
\",f';.'......,.f..J ......
I
~
"n.:;i;~:t .'...,':".l'...'"...''.':..:l~";':,It.":j't'
JUNMAY
SLN5Hlr£-1982
~5Hlt£-1983
SLN5"1Nt::-1981
I ~r.xn)
1,!',(Xl}
11£lXl)
IJSIXIl
130ClD
12SCOJ
1200D
II scm
IUXD)
IOsroJ
IOCOXl
gsnu
90C0J
115lDJ
800))
75{'0)
0:>7COl)
01
IiSlDl
6oca:J
SSOOJ
500:D
1S1llJ
10C0J
J5(XXJ
3lDD
25COl
200XJ
I scm
100))
sm:J
Figure 35,Susitna River hydrograph for May-October 1981,1982,1983
and 1984 at Sunshine Station (USGS 15292780),
Table 10.Summary of monthly mean,maximum and minimum discharges at
Sunshine (USGS 15292780).
1981 1982 1983 1984*
June Mean 50,890 62,820 58,100 59,280
Max 74,000 78,600 80,800 93,000
Min 40,200 46,400 40,800 32,000
July Mean 85,600 63,030 55,380 59,140
Max 150,000 99,300 72,800 84,500
Min 41,000 46,100 43,500 47,900
Aug Mean 84,940 45,590 60,580 58,720
Max 126,000 73,500 100,000 104,000
Min 60,200 34,900 43,000 38,000
Sept Mean 32,460 48,830 30,010 23,950
Max 58,800 91,300 65,200 35,000
~1i n 19,000 32,500 18,000 17,400
Oct Mean 16,450 16,180 21,340 12,350
Max 22,000 30,600 43,300 18,600
Min 10,000 7,800 12,800 7,800
*Provisional USGS Data.
86
-
....
....
-
The determination of initial breach"ing discharges for each study site
proved to be difficult as only limited observations were available which
could be used to determine when study site breaching initially occurred.
The range of mainstem discharge which afforded these observations
only occurred during a brief period in late August and early September
during which time mainstem discharge decreased rapidly.As a result~
the initial breaching discharges presented in this memorandum are a
compilation of field observations and reviews of available aerial
photographs.Aeri a1 photography t however ~does not always allow the
resolution necessary for determining when the head of a study site is
initially breached.A summary of the initial breaching discharges
determined for the Task 36 study sites is presented in Table 11.
As progressively higher mainstem discharges overtop the head of the
study site,the hydraulic conditions of the study site become controlled
by mainstem discharge.The point at which this initially occurs is
termed the controlling breaching discharge and is reflected on the WSEL
versus mainstem discharge rating curves as a dgfinite change in slope of
the regressi on 1i nee The nonbreached conditions are usually ref1 ected
in these curves as having regression lines which are nearly horizontal
or in some instances~having a slight slope.Once the hydraulics of the
study site become directly controlled by mainstem discharge the slope of
the line dramatically by changes due to the influence of mainstem
discharge.
87
Table 11.Initial breaching discharges,controlling discharges and the corresponding streamflows
for the 1984 Task 36 study sites.
Estimated
Initial Controlling Streamflow (cfs)
Breaching Mainstem
Discharge Discharge WSEL vs Flow vs
Location RM (cfs)(cfs)Flow Oms
Is 1and
Side Channel 63.2 34,000 35,000 43.5 68.8
Mainstem West Bank
5.71 5.71SideChannel74.4 19,000 19,600
Circular
Side Channel 75.3 36,000 36,000 26.8 26.8
Sauna
Si de Channel 79.8 37,000 38,000 22.5 19.8
Sunset
Side Channel 86.9 31,000 32,000 45.8 41.1
Trapper
31.41 31.41SideChannel91.6 43,000 44,000
These stream flow values are actual measurements of discharge and are not estimated values.
88
----'lTFf'TT----1---------
In most WSEL versus mainstem discharge rating curves,the lines defining
the nonbreached and breached controlled conditions intersect.Several
gage sites,however,exhibited a gap in elevation between the
nonbreached and controlled conditi ons.Thi sis specul ated to result
from changes in channel geometry.A hi9h flow event (l04,OOO cfs)
occurred on August 26 which could have caused such channel movement.
Field observations have noted that the character of the side channel
morphology (gravel substrate)at each study site is susceptible to
movement.
The information derived from the rating curves and the initial breaching
information were used to determine the controlling discharges presented
in Table n.The controlling discharges presented in Table 11 are the
best determination of the controlling mainstem discharges for sites
based on available data collected to date.
Because of the distances between the Sunshine gaging station and certain
r
lower river study sites,a lag time curve was developed to analyze the
travel time of a flood wave to move from Sunshine gaging station to the
Susitna gaging station.Using this analysis,it was determined that it
took 7 hours for the leading edge of a peak event to be experienced at
Island Side Channel at a mainstem discharge of approximately 57,000 cfs
(Attachment Fi gure A-I).A further di scussi on of the 1ag time curve
development is found in Attachment A.
89
Mainstem discharge was found to influence the extent of backwater found
at the Task 36 study sites.Table 12 provides a summary of the extent
of backwater as well as the range of mainstem discharges during which
backwater was determined to exist.Backwater areas controlled directly
by mainstem discharge were found to exist at all sites with the excep-
tion of Mainstem West Bank Side Channel and Trapper Side Channel.Field
observations,however,show an area of backwater was found to exist in
the minor channel of Mainstem West Bank.
90
Table 12.Summary of the extent of backwater and the correspondi ng ranges of mai nstern
discharge.
Extent of Range of
Backwater Mainstem Discharge
Location RM (ftl (cfsl Head Condition
Island 63.2 1,100 35,000 Unbreached
Side Channel 1,100 38,000 -66,700 Breached
Mainstem 74.4 I sol ated to 24,000 -54,100 Breached
West Bank minor channel
F Side Channel
Circular 75.3 1,200 55,000 -66,700 Breached
Side Channel
Sauna 79.8 1,400 56,000 -56,700 Breached
Side Channel
Sunset 86.9 1,100 56,000 -66,700 Breached
Side Channel
Trapper 91.6 None N/A N/A
Side Channel
91
5.0 GLOSSARY
Backwater Area - A reach of stream with reduced or no velocity and a
rise in stage resulting from a hydraulic or physical barrier.
Backwater areas in habitats adjacent to the Susitna River usually
are due to an increase in mainstem discharge and occur at the mouth
of or within a side channel or slough.
Breaching -The overtopping of the head of a side channel or side slough
by the mainstem river.
Controlling Discharge -The mainstem discharge at Sunshine (USGS
15292780)required to breach the upstream end of the side channel
or side slough and govern the hydraulic characteristics within a
side channel or side slough .
.Cross Section Profile - A survey of the vertical section of a channel
bottom taken at right angles to a survey line resulting in a
ground/streambed profile.
Discharge -Discharge is defined as the volume rate of flow of water
passing a specific location at a specific period in time,expressed
as cubi c feet per second (cfs).For the purpose of thi s report
"discharge"will refer specifically to mainstem flow.
Flow -The movement of a volume of water from place to place.See
Discharge and Streamflow.
92
I"""
[
r
-[
Gaging Station - A location which has been established for monitoring
stage,flow and/or discharge.
Gradient -Rate of change in vertical elevation per unit horizontal
distance.
Head -The upstream end or point of origin of a lotic water body.
Initial Breaching Discharge -The mainstem discharge at Gold Creek which
represents the initial point when mainstem water begins to enter
the head of a side channel/side slough.
Mainstem -Consists of those portions of the Susitna River that normally
convey water throughout the year.Both single and multiple channel
reaches are included in this habitat category.Groundwater and
tributary inflow appear to be inconsequential contributors to the
overall characteristics of mainstem habitat.Mainstem habitat is
typically characterized by high water velocities and well armored
streambeds.Substrates generally cons i st of boul der and cobb 1e
size materials with interstitial spaces filled with a grout-like
mixture of small gravels and glacial sands.Suspended sediment
concentrations and turbidity are high during summer due to the
influence of glacial melt-water.Discharges recede in early fall
and the mainstem clears appreciably in October.An ice cover forms
on the river in late November or December~
93
Mean Daily Discharge -The computed mean mainstem discharge per 24 hour
period for a USGS gaging station.
Mouth -The downstream confl uence of a loti c water body with another
water body.
Observed Data -Values derived through a visual estimate or evaluation.
Rating Curve - A curve representing a simple relation between two
variables to be used to determine values of the dependent variable
as a function of the independent variable.The rating curves
developed using project measurements of stage and discharge consist
of discharge rating curves and stage rating curves.The discharge
rating curves are used to determine streamflow as a function of
mainstem discharge and streamflow as a function of water surface
elevation.The stage rating curves are used to determine stage,
water surface elevation,as a function of mainstem discharge.
Side Channel -Consists of those portions of the Susitna River that
normally convey water duri ng the open water season but become
appreci ab ly dewatered duri ng peri ods of low ma instem di scharge.
Side channels may exist either in well defined overflow channels or
in poorly defined water courses flowing through partially submerged
gravel bars and islands along the margins of the mainstem river.
Side channel streambed elevations are typically lower than the mean
monthly water surface elevations of the mainstem Susitna River
observed during June,July,and August.Side channels are
94
I"'"
I
I
i
,...,
characterized by shallower depths,lower velocities and smaller
streambed materials than the adjacent mainstem river.
Side Slough -Those channels located between the edge of the floodplain
and the mainstem and side channels of the Susitna River.It is
usually separated from the mainstem and/or side channels by well
vegetated bars.An exposed alluvial berm often separates the head
of the slough from mainstem discharge or side channel flows.The
contro 11 i ng streambed/bank e1evati ons at the upstream end of the
side sloughs are slightly less than the water surface elevations of
the mean monthly discharges of the mainstem Susitna River observed
for June,July,and August.At intermedi ate and 1ow-di scha rge
periods,the side sloughs convey clear water from small tributaries
and/or upwelling groundwater.These clearwater inflows are
""..essential contributors to the existence of this habitat type.The
water surface elevation of the Susitna River generally causes a
backwater to extend well up into the slough from its lower end.
Even though this substantial backwater exists,the sloughs function
hydraulically·very much like small stream systems and several
hundred feet of the slough channel often conveys water independent
of mainstem backwater effects.At high discharges the water
surface elevations of the mainstem river is sufficient to overtop
the upper end of the slough.Surface water temperatures in the
side s.loughs duri.ng summer months are principally a function of air
temperature,solar radiation,and the temperature of the local
runoff.
95
Staff Gage - A non-recording staff,marked in graduations of hundredths
of feet,used to monitor stage through observation.
Stage -The height of the water surface above an establ ished datum
plane.Stage can be converted to true water surface elevation if
the observations are converted into project datum.
Streamflow -Same as discharge but refers specifically to side channel,
slough and tributary flow whereas discharge denotes in the
mainstem.See Discharge.
Thalweg Profile - A longitudinal profile that describes the streambed
elevation of the deepest portion of mainstem,tributary,slough or
other riverine habitats.
WSEL -Abbreviation for water surface elevation.
96
.....
6.0 CONTRIBUTORS
PROcJECT LEADER
Aquatic Habitat and Instream Flow
Project Leader
PRIMARY AUTHORS
REPORT COORDINATORS
EDITORS
DATA PROCESSING
DATA COLLECTION
DRAFTING
TYPING
97
Douglas Vincent-Lang
Tim Quane
Pat Morrow
Isaac Queral
Tim Quane
Douglas Vincent-Lang
Teri Kekl ak
A11 en Bi nghalll
Alice Freeman
Donna Bucholz
Pat Morrow
Tommy Withrow
Isaac Queral
Glen Freeman
Doug Sonnerholm
Chri s Kent
Sharie Methvin
Carol Hepler
Roxanne Peterson
Camille Stephens
Skeers Word Processing
7.0 ACKNOWLEDGEMENTS
The authors wish to thank Bob Aaserude ad Diane Hilliard of E.W.Trihey
&Associates for providing their assistance with the study design,data
reduction,and editing associated with this report.Special thanks to
Larry Leveen of the U.S.Geological Survey for his effort in producing
numerous instantaneous discharges in support of the time lag analysis.
Funding for this study was provided by the State of Alaska,Alaska Power
Authority.
98
~
I
r-
I
8.0 LITERATURE CITED
Alaska Department of Fish and Game (ADF&G).1984.Su Hydro Aquatic
Studies (May 1983 -June 1984)Procedures Manual.Final Draft.
Prepared for Alaska Power Authority Anchorage,Alaska.
u.s.Geological Survey (USGS).1978.Surface water records of Cook
Inlet Basin,Alaska,through September 1975.Open-file Report
78-498 (basic data).
1982.Water Resources Data for Alaska:Water Year 1981.USGS
Water Data Report AK-81-1.Anchorage,Alaska.
1983.Water Resources Data for Alaska:Water Year 1982.USGS
Water Data Report AK-82-1.Anchorage,Alaska.
1984.Water Provisional Summary of 1984 Water Resources Data
for Alaska.
99
,-.
i
I
-i.
AT T AC H MEN T A
-
TIME LAG ANALYSIS FOR THE LOWER SUSITNA RIVER BASIN
Stage and discharge values in the lower Susitna River can range
considerably during a 24 hour period as evidenced by inspection of the
Sunshine Station hydrograph (USGS 15292780).This is particularly true
for peaking discharge periods resulting from storm events.To develop
correlations for rating curves of stage and streamflow data between
specific side channels and the mainstem during peaking mainstem
discharge events the use of instantaneous mainstem discharge values is
necessa ry.
To obtain instantaneous mainstem discharge values at sites that are some
distance downstream from the reference gaging station requires an
assessment of the basin lag time.Lag time is the time required for a
flood wave to move down a drainage basin from the gaging station to the
study site.
To evaluate instantaneous site specific measurements of stage and
discharge at study sites during high flow events"it is necessary to
determine the magnitude of the flood wave and the time of day the wave
infl uenced the site specifi c measurements.To determi ne the di scharge
represented by the flood wave requires an assessment of the velocity (v)
of the wave;
A-I
v =x/t
where
x =distance from reference gage to site
t =time required for flood wave to travel from the
reference gage to the site.
To assess the velocity of several flood waves,the hydrographs for
Sunshine and Susitna Stations were analyzed (USGS 15292780 and 15294350,
respectively).Four peak events of varying magnitude that could be
clearly distinguished in both hydrographs were selected for analysis.
The objective was to determine the time it took for each flood wave to
travel the 58.1 miles between gaging stations.The following values
were obtained from the USGS (Larry Leveen,pers.COlTlm.,1/31/85).
Type of Sunshine Susitna
Date Event Discharge Time Discharge Time
July 27 Peak 86,900 0900 135,000 2330
August 19-20 Peak 64,000 2300 150,000 1600
August 26 Peak 114,000 0300 171,000 1400
September 14-15 Peak 24,500 1030 54,500 2400
From these values,flood wave velocities were calculated.
Time VelocitY Sunshine
Date (hrs)(ft/sec)Q (cfs)
July 27 14.5 5.88 86,900
August 19-20 17.0 5.01 64,000
August 26 11.0 7.75 114,000
September 14-15 37.5 2.27 24,500
A-2
A logarithmic regression relationship was developed between flood wave
velocity and discharge at Sunshine Station.This equation is as
follows:
v =10-3 •086 0°·785,r 2 =0.996.
Attachment Table A-I provides a tabulation of the distance in miles that
a flood wave of a given magnitude will travel in a given time interval
for the lower Susitna River.Attachment Figure A-I provides a graphic
representation of the data presented in Attachment Table A-I.To
determi ne the instantaneous rna instem di scharge occurri ng at a study
site,the following procedure was used:
1)the instantaneous mainstem -discharge at Sunshine
determined corresponding to the time of day for a
specific stage observation;
was
site
-
-
2)the distance of the study site from the Sunshine station was
determined;
3)the instantaneous mainstem discharge and the distance were
plotted in Attachment Figure A-I to determine the lag time of
the flood wave;
A-3
Attachment Table A-1.Distance in miles that a flood wave of a given magnitude will
travel in a given time.
Lag Time Magnitude of Flood Wave (cfs)
(Hours)15,000 20,000 30,000 40,000 60,000 80,000 90,000 100,000 150,000
4 4.2 5.3 7.3 9.1 12.5 15.7 17.2 18.7 25.7
6 6.4 7.9 10.8 13.7 18.8 23.5 25.8 28.1 38.6
8 8.5 10.6 14.5 18.2 25.0 31.4 34.4 37.4 51.4
10 10.6 13.2 18.2 22.8 31.3 39.2 43.0 46.8 64.3
12 12.7 15.9 21.8 27.3 37.6 47.1 51.6 56.1 77 .1
14 14.9 18.5 25.4 31.9 43.8 54.9 60.3 65.5 90.0
16 17.0 21.2 29.1 36.4 50.1 62.8 68.9 74.8 102.8
18 19.1 23.8 32.7 41.0 56.4 70.6 77 .5 84.2 115.7
20 21.2 26.4 36.4 45.6 62.6 78.5 86.1 93.5 128.5
24 25.5 31.7 43.6 54.7 75.1 94.2 103.3 112.2 154.2
28 29.7 37.0 50.9 63.8 87.7 109.9 120.5 130.9 179.9
32 34.0 42.3 58.2 72.9 100.2 125.6 137.7 149.6 205.0
36 38.2 47.6 65.4 82.0 112.7 141.3 154.9 168.3 231.3
40 42.5 52.9 72.7 91.1 125.2 157.0 172.2 187.0 257.1
44 46.7 58.2 80.8 100.2 137.8 172.7 189.4 205.7 282.8
A-4
,....-.-..~...-.."__-:-__~....:...:-:.:...:..:..:..:..:.:..=:..:.:----.--L _
<-..~
~---~-----
10Q ._
gal---:•---••-2.~_
80~::.__:-..:...::....:.~---.
Z io'~---.:.-~=~;+.:::.:.:..;:::.:.::.:/..~6~7t:~§~~~*~~b~-=+~.-~~
-
.~.
"."__._.L--~__:.-..
'"7 ~.
---~------------...._--
100,000
LowER CSuS»ITNA
REFt~E.NC.~1)To
1<I\lER.'BAsIN LAC1 \\T'-'E.S
~uNS~'NE S-rP\.,.'ON.
Attachment Figure A-I.
A-5
4)the lag time was subtracted from the time of the stage
observation to yield the time of day the flow wave was measurd
at the Sunshine station.The instantaneous mainstem discharge
at Sunshine station for this revised time is the discharge
corresponding to the site specific stage measurement.
A-6
r
.....
A T T AC H MEN T B
iOJJ4,f
1 -}--~J ---l }-}
Attachment Table B-1.Comparison of water surface elevations and streamflow)measured at
Task 36 study'sites)to mean daily mainstem discharge (cfs)at
Sunshine (USGS 15292780).
o:l
I......
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs )Discharge (cfs)
---------------------------------------------------
Island Side Channel TR 1 (Q Site)840930 90.86 17 )800
(063.2S1 at RM 63.2)840831 1300 91.90 38)000
840719 1215 93.13 51 )600
840712 1530 93.33 379.0 54)100
840725 1300 93.33 303.0 53)500aJ
840725 2010 93.54 56)100
840704 1150 93.55 58 )600
840811 1630 93.77 515.0 60)000
840801 1430 93.73 60)300
840626 1500 93.95 64)800
840807 1325 94.17 66)700
a/Discharge value is instantaneous and was determined using a time lag evaluation.
Attachment Table B-1.continued
CD
I
N
WSEL Streamflow Mainstem
Location Date Time (ft )(cfs)Discharge (cfs)
-----------------------------------------....._--------
Island Side Channel TR lA 840930 90.93 17 ,800
(063.257 at RM 63.2)840919 1200 91.37 28,400
840901 1330 91.69 35,000
840831 91.93 38,000
840725 1745 '93.46 56,100
840725 1940 93.56 56,100
840801 93.75 60,300
840807 1325 94.16 66 1700
i 1 r--)1 ----1 J 1
o:J
I
W
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
r'sland Side Channel TR 2 840930 90.88 17 ,800
(063.2S2 at RM 63.2)840919 1210 91.33 28,400
840901 91.68 35,000
840831 91.89 38,000
840725 1710 93.41 56,100
840725 1935 93.52 56,100
840801 93.74 60,300
840807 1325 94.16 66,700
Attachment Table B-1.continued
co
i
-Po
W,SEL Streamflow Mainstem
Location Date Time (ft )(efs)Discharge (cfs)
---------------------------------------------------
Island Side Channel TR 3 840930 91.23 l7,BOO
(063.2S3 at RM 63.2)840901 91.70 35,000
840831 91.90 38,000
840725 1550 93.44 56,100
840725 1500 93.48 56,100
840725 1900 93.55 56,100
840801 93.79 60,300
840807 1325 94.24 66,700
)]1 l -1 7·}~....-1 1
c:o
I
Ul
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Island Side Channel TR 4 840930 91.56 17 ,800
(063.2S4 at RM 63.2)840901 1500 91.71 35,000
840831 91.90 38,000
840725 1850 93.62 56,100
840801 93.89 60,300
840807 1325 94.34 66,700
--------------------------------------------------------------------------------------------
Attachment Table B-I.continued
co
I
(J)
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Island Side Channel TR 4A 840930 91.56 17 ,800
(063.2S8 at RM 63.2)840901 91.77 35,000
840831 91.94 38,000
840125 1400 93.52 56,100
840125 1830 93.66 56,100
.840801 93.93 60,300
840801 1325 94.31 66,700
OJ
I
""-J
1 -,,~-J '}\)}}-,i 1 1 1
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Island Side Channel TR 5 840930 91.57 17 ,800
(063.2S5 at RM 63.2)840927 91.57 18,300
840915 91.59 22,300
840901 91.73 35,000
840831 91.94 38,000
840725 1300 93.56 56,100
840801 93.98 60,300
840807 1325 94.44 66,700
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(dB)Discharge (ds)
---------------------------------------------------
I~land 8ide Channel TR 6 (Q Site)840930 91.54 17,800
(063.286 at RM 63.2)840927 1400 91.56 18,300
840915 91.62 22,300
840901 1300 91.75 35,000
840831 1230 91.95 38,000
840719 93.36 51,600
840712 1130 93.67 394.9 54,100 a/
840725 1220 93.55 337.7 53,600 a/
840725 1620 93.61 359.5 54,200
840725 1915 93.70 56,100
840704 93.84 58,600
840811 1150 94.08 543.0 60,000
840811 1425 94.08 60,000
840801 94.00 60,300
840626 1520 94.30 64,800
840626 1520 94.31 64,800
OJ 840807 94.40 66,700I
00
--------------------------------------------------------------------------------------------
a/Discharge value is instantaneous and was determi~ed using a"time lag evaluation.
1 ".~)~1 ;-0''''')'--j '),-l "'1 1 )
Attachment Table B-1.continued
---------------------------------------------------------------------------------------------WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Mainstem W\B S.Chan.TRI (Q Site)841010 1430 92.64 .5 14.700
(074.481 at RM 74.4)840925 1005 92.85 5.7 19.600
840915 1110 93.90 73.1 22.300
840914 94.12 24.000
840920 1450 94.62 309.9 30.500
840902 94.94 32.000
840902 1231 94.97 449.6 32.000
840817 95.49 42.500
840815 95.56 .46.000
840712 1050 95.96 1260.0 54.100
840711 1130 96.01 55.100
840711 1130 96.08 55.100
840724 1600 96.02 1267.0 55.200
t:O 840723 1950 95.98 56.100I
l.O 840721 96.02 57.700
840721 96.03 57 .700
840801 96.22 60.300
840801 96.24 60.300
840810 1745 96.49 66.400
840810 1445 96.54 1910.0 66.400
840807 1205 96.49 66.700
840827 1240 97.14 79.700
840827 1010 97.19 2814.1 79.700
-----------~--------------------------------------------------------------------------------
OJ
I
I-'o
Attachment Table B-1.continued
------------------------------------------------~--------------------------------------------WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Mainstem West Bank Side Chan.TR 2 841010 92.63 14,700
(074.482 at RM 74.4)840915 93.74 22,300
840914 94.13 24,000
840920 1535 94.64 30,500
840902 94.98 32,000
840902 1503 95.00 .32,000
840817 95.60 42,500
840815 95.64 46,,000
840711 1215 96.06 55,100
840711 1215 96.09 55.100
840723 1950 96.02 56,100
840723 1950 96.07 56,100
840721 96.09 57,700
840721 96.14 57,700
840801 96.31 60,300
840801 96.32 60,300
840810 1805 96.54 66,400
840810 1805 96.62 66,400
840807 1205 96.51 66,700
•
1 •'--1
Attachment Table B-1.
J --1
continued
--j 1
ec,..........
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Mainstem West Bank Side Chan.TR 2A 840903 1230 94.90 29,000
(074.485 at RM 74.4)840920 94.67 30,500
840902 94.99 32,000
--------------------------------------------------------------------------------------------
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------.......-----------------------------------
Mainstem West Bank Side Chan.TR 3 841010 93.03 14,700
(074.483 at RM 74.4)840915 93.80 22,300
840914 94.18 24,000
840903 94.97 29,000
840920 1323 94.70 30,500
840902 1604 95.04 32,000
840902 95.08 32,000
840815 95.92 46,000
840711 1300 96.39 55,100
840723 1950 96.36 56,100
840721 96.44 57,700
840801 96.67 60,300
840810 1805 96.81 66,400
OJ 840810 1805 96.94 66,400I
1-1 840807 1205 96.81 66,700N
'I
,..)'~--'l "',_,0 1
Attachment Table B-1.continued
'1 '1 p--,]
cc
I
~
W
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (it)(cfs)Discharge (cfs)
---------------------------------------------------
Mainstem West Bank Side Chan.TR 3A 841010 93.05 14,700
(074.456 at RM 74.4)841001 1120 93.37 18,700
840925 1210 93.51 19,600
840915 94.04 22,300
840914 94.44 24,000
840903 1100 95.21 29,000
840920 1248 94.93 30,500
840902 1628 95.29 32,000
840902 95.32 32,000
Attachment Table B-1.
Location
continued
Date Time
WSEL
(ft )
Streamflow
(cfs)
Mainstem
Discharge (cfs)
OJ,
I-'
-Po
Mainstem West Bank Side Chan.TR 3B
(074.4S7 at RM 74.4)
840903 95.06 29,000
1 1 l f:J 1
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Mainstem West Bank Side Chan.TR 4 841010 1430 94.63 14,700
(074.4S4 at RM 74.4)840914 1145 95.83 24,000
840903 96.39 .29,000
840920 1239 96.16 30,500
840902 1845 96.49 32,000
840902 1715 96.54 32:,000
840817 97.22 42,500
840815 97.30 46,000
840711 1400 97.50 55,100
840711 1400 97.70 55,100
840723 1950 97.67 56,100
840721 1215 97.62 57,700
840801 1601 97.90 60,300
1;0 840810 1810 97.86 66,400I
I-'840810 181'0 98.19 66,400U1
840807 1205 97.97 66,700
--------------------------------------------------------------------------------------------
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------.-
WSEL Streamflow Mainstem
Location Date Time (ft )(cfs)Discharge (cfs)
---------------------------------------------------
Circular Side Chan.TR 1 (Q Site)840920 0855 87.87 .5 30,500
(075.3S1 at RM 75.3)840830 1700 89.10 40,800
840817 1700 89.25 42,500
840817 1740 89.28 43.1 42,500
840803 90.23 54,700
840803 90.24 54,700
840724 1855 90.26 55,200
840724 1855 90.26 55,200
840724 1140 90.29 204.2 55,200
840724 1225 90.30 191.0 55,200
QJ 840724 1330 90.30 55,200
I 840723 90.31 56,100f-'
'"840811 1250 90.81 281.4 60,000
840706 90.70 60,400
840706 90.70 60,400
840706 90.72 60,400
840824 1235 90.78 64,800
840824 1235 90.78 64,800
840626 1045 90.99 64,800
840626 1045 91.00 64,800
840807 1245 91.24 66,700
840827 1800 91.75 79,700
840827 1615 91.82 745.5 79,700
)····~i
Attachment Table B-1.continued
·1 i -,
OJ
I.......
-....I.
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (ds)
---------------------------------------------------
Circular Side Channel TR 2 840830 89.27 40,800
(075.382 at RM 75.3)840817 89.27 42,500
840817 1830 89.30 42,500
840803 90.21 54,700
840724 1905 90.26 55,200
840811 1225 90.77 60,000
840824 1230 90.80 64,800
840807 1245 91.19 66,700
-----------------------------------------------~--------------------------------------------
o:J
I......
00
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
----------------------------------------------------
Circular Side Channel TR 2A 841010 88.06 14,700
(075.386 at RM 75.3)840903 88.69 29,000
840920 0930 88.67 30,500
840902 88.70 32,000
840830 89.33 40,800
840817 1940 89.41 42,500
840803 90.26 54,700
840724 1905 90.28 55,200
840724 1600 90.31 55,200
840824 1230 90.81 64,800
840807 1245 91.18 66,700
-~
""'
-1 -,-"],-J
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft )(cfs)Discharge (cfs)---------------------------------------------------
Circular Side Channel TR 3 840914 1330 89.45 24,000
(075.383 at RM 75.3)-840903 89.55 29,000
840920 0946 89.50 '30,500
840902 1904 89.56 32,000
840830 1445 90.06 40,800
840817 1545 90.17 42,500
840817 1923 90.20 42,500
840710 1455 90.51 52,500
840803 1105 90.62 54,700
840724 1200 90.67 55,200
840724 1910 90.60 55,200
840723 1645 90.64-56,100
840811 1225 91.01 60,000
c:o 840706 1100 90.92 60,400I
I-'840824 1225 91.03 64,800l.O 840626 1040 91.15 64,800
840626 1040 91.21 64,800
840807 1245 91.32 66,700
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Circular 8ide Channel TR 4 (Q Site)840928 1610 89.54 17,700
(075.384 at RM 75.3)840914 89.72 24,000
840903 89.85 29,000
840920 1010 89.77 .5 30,500
840902 89.84 32,000
840830 90.40 40,800
840817 90.57 42,500
840817 1740 90.60 49.6 42,500
840710 1415 91.13 150.0 52,500
840803 91.24 54,700
840724 1330 91.25 200.2 55,200
840724 1910 91.26 55,200
840724 1015 91.29 192.5 55,200
OJ 840724 1105 91.30 55,200I
N 840723 91.26 56,1000
840811 1220 91.58 60,000
840811 1105 91.59 295.0 60,000
840824 1220 91.54 64,800
840824 1220 91.56 64,800
840807 1245 91.83 66,700
840827 1555 92.43 79,700
840827 1425 92.49 860.0 79,700
"~~~}
Attachment Table B-1.continued
!
OJ
I
N-
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Circular Side Channel TR 5 841010 89.04 14,700
(075.3S5 at RM 75.3)841009 89.10 15,000
840928 89.55 17 ,700
840914 89.73 24,000
840903 89.84 29,000
840920 1020 89.76 30,500
840724 1500 91.32 55,200
840724 1915 91.32 55,200
Attachment Table B-1.continued
OJ
I
N
N
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
--------------...._-----------------------------------
Circular Side Channel Head 840710 1600 91.81 52,500
(075.3H3 at RM 75.3)840723 1520 92.00 56,100
840624 ··1515 92.99 70,100
-:'\
1
Attachment Table B-1.continued
))}1
OJ
I
N
W
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Sauna Side Channel TR 1 841009 88.75 .15,000
(079.8S1 at RM 79.8)840817 1030 89.15 42,500
840823 1550 90.63 54,600
840723 90.70 54.0 56 t 100
840723 1300 90.72 56,100
840802 90.73 56,700
--------------------------------------------------------------------------------------------
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs-)Discharge (cfs)
I ---------------------------------------------------~
'1 Sauna Side Channel TR 2 (Q Site)841009 89.00 15,000"I
j (079.8S2 at RM 79.8)840710 1040 90.24 37.8 52,500
i 840823 1500 90.61 54,600
840723 1200 90.71 52.0 56,100
840723 1215 90.73 50.0 56,100
840723 1220 90.73 56,100
840802 1645 90.75 56,700
840721 1545 90.91 57,700
840828 1055 91.09 59,900
840828 0925 91.13 57.6 59,900
840706 1515 91.18 60,400
840810 1350 91.83 66,400
840810 1255 91.85 67.5 66,400
o:J 840807 91.26 66,700I
N 840625 1600 91.82 67,100+:>
840625 1600 91.86 67,100
}
Attachment Table B-1.continued
1
OJ
I
N
(J1
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft).(cfs)Discharge (cfs)
--------------------------------------------------
Sauna Side Channel TR 3 841009 88.90 15,000
(079.883 at RM 79.8)840823 1510 90.64 54,600
840723 1540 90.66 56,100
840723 90.72 55.0 56,100
840723 1414 90.75 56,100
840802 90.75 56,700
Attachment Table B-1.continued
OJ
I
N
0'\
---------------------------------------------------------------------------------------------W8EL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Sauna Side Channel TR 4 841009 89.02 15,000
(079.884 at RM 79.8)840928 1045 89.02 17 ,700
840914 1700 89.02 24,000
840830 89.39 40,800
840817 89.29 42)500
840823 1510 90.65 54,600
840723 90.69 45.0 56,100
840723 1625 90.69 56)100
840802 1510 90.79 56,700
}1 -).--_.'.1 1 ,.._)-11.
J '-~1
OJ
I
N
-...J
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Sunset Side Channel TR 0 840929 92.70 17,400
(086.980 at RM 86.9)840822 1600 95.54 54,300
840803 1535 95.60 54,700
840723 1230 95.58 56,100
840722 1225 95.09 57,800
840722 1650 95.62 57,800
840808 1655 96.67 65,900
840807 1450 96.68 66,700
Attachment Table B-1.continued
---------------------------------------~----------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfa)
------------------.---------------------------------
Sunaet Side Channel TR 1 (Q Site)840929 1440 93.27 1.0 17,400
(086.951 at RM 86.9)840930 93.27 17,800
840916 93.29 21,000
840912 1305 93.29 1.4 22,700
840913 1440 93.30 22,700
840919 0915 93.29 28,400
840817 94.34 127.0 42,500
840822 1600 95.53 54,300
840803 1540 95.58 54,700
840709 1705 95.59 533.0 55,400
840709 1200 95.69 55,400
840723 0940 95.58 446.0 56,100
840723 1040 95.58 56,100
OJ 840721 1205 95.45 57,700I840722121095.67 496.0 57,800Nco840808162596.63 65,900
840808 1240 96.67 944.7 65,900
840801 1450 96.69 66,700
840825 1500 99.42 3895.0 93,300
840826 0910 99.88 104,000
-i 1 I I 1 ]--~-1 '_.--'1 I
OJ
I
N
1.0
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Sunset Side Channel TR 2 840929 1140 93.81 17,400
(086.9S2 at RM 86.9)840930 93.79 17,800
840916 93.81 21,000
840912 1510 93.81 22,700
840914 1500 93.81 24,000
840919 0925 93.80 28,400
840822 1510 95.71 54,300
840803 1555 95.68 54,700
840709 1300 95.94 55,400
840723 1415 95.64 56,100 .
840722 1450 95.76 57,800
840722 1235 95.78 57,800
--------------------------------------------------------------------------------------------
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft )(ds)Discharge (ds)
-------------.".-------------------------------------.
Sunset Side Channel TR 3 841005 93.74 16,500
(086.9S3 at RM 86.9)840930 93.69 .17,800
840916 ,93.87 21,000
840912 1510 93.78 22,700
840914 1525 93.87 24,000
840919 0939 93.87 28,400
840817 1530 94.93 42,500
840816 95.02 44,000
840822 1440 95.86 54,300
840803 1450 95.95 54,700
840709 1415 96.01 55,400
840723 1210 95.85 56,100
840722 1950 95.86 57,800
co 840722 1315 95.94 57,800Iw840808165596.86 65,9000
840807 1450 96.89 66,700
J ...-_.]-1 ~-l )1 -----1 --1 ~~.~~-)
Attachment Table B-1.continued
--------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Sunset Side Channel TR 4 840930 94.11 17,800
(086.954 at RM 86.9)840916 94.11 21,000
840912 1505 94.29 22,700
840914 1615 94.31 24,000
840919 0948 94.31 28,400
840817 1530 95.01 42,500
840816 95.10 44,000
840822 95.93 54,300
840822 1440 95.93 54,300
840803 1502 95.92 54,700
840709 1500 96.08 55.400
840723 1140 95.95 56.100
840722 1820 95.96 57,800
OJ 840722 1455 95.98 57,800Iw840808165096.89 65,900.....
840807 1450 96.96 66,700
--------------------------------------------------------------------------------------------
-1
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs )Discharge (cfs)
---------------------------------------------------
Sunset Side Channel TR 5 841005 94.75 16.500
(086.9S5 at RM 86.9)840929 1140 94.76 17.400
840930 1444 94.75 17 .800
840916 1830 94.76 21.000
840912 1500 94.78 22.700
840919 1000 94.76 28.400
840817 1430 95.99 42.500
840816 1345 96.06 44.000
840822 1435 96.66 54.300
840803 1545 96.72 54.700
840709 1600 96.79 55.400
840723 1115 96.65 56.100
840722 1520 96.68 57.800
to 840722 1930 96.68 57 .800I
w 840808 1650 97.31 65.900N
840807 1450 97.36 66.700
1-··1 1 ..-1 1 J ---I ._--~-1
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(ds)Discharge (cf.s)
---------------------------------------------------
Sunset Side Channel TR 6 841005 94.74 16,500
(086.9s6 at RM 86.9)840929 1140 94.75 17 ,400
840930 94.75 17 ,800
840916 94.76 21,000
840919 1030 94.76 28,400
840902 1520 94.88 32,000
840817 1330 95.97 42,500
840816 96.05 44,000
840822 1435 96.62 54,300
840803 1545 96.69 54,700
840722 1830 96.64 57,800
840722 1605 96.65 57,800
840808 1650 97.21 65,900
to 840807 1450 97.29 66,700
Iw
W --------------------------------------------------------------------------------------------
ro
i
W
-Po
Attachment Table B-1.continued
----------------------------------------------~---------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Trapper Creek sIc TR 1 841006 91.92 15,700
(091.682 at RM 91.6)840930 91.93 17,800
840924 91.94 20,400
840917 91.95 20,400
840918 1710 91.95 20,900
840913 1000 91.97 22,700
840816 1735 92.34 44,000
840822 1210 92.76 54,300
840803 1600 92.93 54,700
840819 1110 92.90 57,200
840721 1650 93.11 57,700
840721 1510 93.15 57,700
840722 1135 93.06 57,800
840807 93.75 66,700
840807 1255 93.76 66,700
--------------------------------------------------------------------------------------------
~1 1 1 1 ]~1 J J ~~1 1
Attachment Table B-1.continued
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)
---------------------------------------------------
Trapper Creek sIc TR 2 841006 91.90 15,700
(091.6S3 at RM 91.6)840930 91.92 17 ,800
840917 91.93 20,400
840924 91.93 20,400
840918 1635 91.95 20,900
840913 1000 91.95 22,700
840816 1715 92.00 44,000
840822 1210 92.51 54,300
840803 1600 92.69 54,700
840819 92.69 57,200
840721 1445 92.96 57,700
840721 1710 93.00 57,700
840722 1135 92.89 57,800
co 840807 93.66 66,700
I
w 840807 1255 93.68 66,700
(J'l
--------------------------------------------------------------------------------------------
Attachment Table B-1.continued
---------------------------------------------------------------------------------------------WSEL Streamflow Mainstem
Location Date Time (ft )(cfs)Discharge (cfs)
'-------------.,.,-------------------------------------
Trapper Creek sIc TR 3 841009 92.12 15,000
(091.6S4 at RM 91.6)841006 92.14 15,700
840930 92.14 17 ,800
840924 92.17 20,400
840917 92.19 20,400
840918 1600 92.18 20,900
840913 1000 92.16 22,700
840911 1510 92.14 23,500
840816 1625 92.15 44,000
840822 1205 92.82 54,300
840803 1600 93.02 54,700
840819 93.04 57,200
840721 1220 93.22 57 ,700
co 840721 1530 93.32 57,700Iw840722113593.26 57,800en
840807 94.06 66,700
840807 1255 94.08 66,700
"I 1 --]1 ~l 1 J --~,---1 -1 J --1 ]1
Attachment Table B-1.continued
---------------------------------------------------------------------------------------------
WSEL Streamflow Mainstem
Location Date Time (ft)(cfs)Discharge (cfs)---------------------------------------------------
Trapper Creek sIc TR 4 (Q Site)841009 92.50 15,000
(091.681 at RM 91.6)841006 92.51 15,700
840930 92.47 17 ,800
840917 92.53 20,400
840924 92 .55 20,400
840918 1625 92.60 15.9 20,900
840913 1000 92.56 16.4 22,700
840911 1150 92.56 17 .8 23,500
840911 1400 92.58 23,500
840816 1445 92.70 31.4 44,000 .
840822 0950 93.27 54,300
840803 93.18 54,700
840803 1500 93.42 54,700c;o 840708 1130 93.78 459.0 57 ,100Iw84081993.23 57,200.....,
840721 1310 93.63 389.0 57,700
840721 1530 94.08 57,700
840722 0935 93.61 372.0 57,800
840722 1020 93.62 57,800
840707 1530 93.89 58,800
840707 1600 93.89 58,800
840807 94.18 66,700
840807 1115 94.21 867.8 66,700
840624 1120 94.41 70,100
840624 1500 94.75 70,100
840825 1000 96.28 3158.8 93,300
840825 1230 96.42 93,300
--------------------------------------------------------------------------------------------
-
,.....
!
.....
.....
AT T AC H MEN T C
"""
Attachment Table C-1.Data used in plotting the thalweg profile of
Island Side Channel.
LOCATION OF THALWEG:ISLAND SIDE CHANNEL (RM 63.2)
GAGE NO:63.2S68
DATE:84 09 30
SITE FLOW:1.0 (cfs)1/
USGS DISCHARGE:17,800 (cfs)2/
GAGE READING START:DRY END:DRY
TIME(24 HR.)START:1000 END:1115
T8M IO:ADF&G ISLAND T8M R8 1984
STATION THALWEG WSEL 3/
(ft )ELEVATION (ft)(ft)DESCRIPTION
00+00 88.47 90.22
00+73 90.27 90.73
01+38 90.30 90.75
02+34 90.70 90.82
02+90 89.10 90.86 TRANSECT I-STAFF GAGE
63.2S1
03+15 87.97 90.89
03+54 87.30 90.93 TRANSECT lA-STAFF GAGE
63.2S7
04+22 89.00 90.88 TRANSECT 2-STAfF GAGE
63.2S2
04+90 89.79 90.89r-05+20 90.80 90.87
05+67 90.30 91.23 TRANSECT 3-STAFF GAGE
63.2S3
06+50 91.40 91.56 TRANSECT 4-STAFF GAGE
63.2S4
07+38 90.91 91.56 TRANSECT 4A-STAFF GAGE
63.2S8
07+97 89.22 91.56
08+64 88.60 91.57 TRANSECT 5-STAFF GAGE
63.2S5
09+37 88.72 91.55
10+37 89.02 91.54 TRANSECT 6-STAFF GAGE
63.2S6-11+94 91.22 91.54
13+15 92.65 DRY
14+13 92.64 DRY
15+18 91.07 92.22
"'""
1/Estimated streamflow at time of the thalweg measurement.
f¥'<
2/Mean daily mainstem discharge at Sunshirie USGS gaging
station (15292780)corresponding to date of thalweg-measurement.
3/Water surface elevation determined at each thalweg point
~
during survey of thalweg profile.
C-1
Attachment Table C-2.Data used in plotting the thalweg profile of Main-
stem West Bank Side Channel (Main Channel).
LOCATION OF THALWEG:MAINSTEM WEST BANK SIDE CHANNEL {MAIN CHANNEL,RM
74.4}
GAGE NO:REMOVED
DATE:84 10 10
SITE FLOW:1.0 (cfs)l/
USGS DISCHARGE:14,700 (cfs)2/
GAGE READING START:DRY END:DRY
TIME(24 HR.)START:1235 END:1415
TBM 10:ADF&G MAINSTEM WESTBANK T8M
RB 840915
1/
2/
3/
STATION THALWEG WSEL 3/
(ft)ELEVATION (ft)(ft)DESCRIPTION
00+00 91.73 92.43
00+64 91.71 92.44
01+18 91.59 92.46
01+46 92.43 92.61
02+18 91.99 92.62
03+29 91.10 92.64 TRANSECT 1 STAFF GAGE
74.4S1
03+98 91.25 92.62
04+95 91.60 92.63 TRANSECT 2 STAFF GAGE
74.4S2
05+74 91.88 92.63
06+58 92.25 92.62
07+00 92.50 92.76
07+38 92.37 92.79
07+90 92.51 92.78
08+06 92.78 93.04
08+64 92.71 93.03 TRANSECT 3 STAFF GAGE
74.4S3
09+07 93.00 93.05 TRANSECT 3A ST.GAGE 74.4S6
09+84 93.08 93.29
10+44 93.10 93.46
11+18 93.90 94.10
11+78 94.12 94.34
12+19 93.74 94.34
12+52 94.09 94.32
12+87 94.52 94.63 TRANSECT 4 STAFF GAGE
74.4S4
13+56 94.90 95.15
14+17 95.04 95.25
14+97 94.32 95.28
Measured streamflow at time of the thalweg measurement.
Mean daily mainstem discharge at Sunshine USGS gaging
station (15292780)corresponding to date of thalweg
measurement.
Water surface elevation determined at each thalweg pointduringsurveyofthalwegprofile.
C-2
Attachment Table C-3.Data used in plotting the thalweg profile of
Mainstem West Bank (East Channel).
LOCATION OF THALWEG:MAINSTEM WESTBANK SIDE CHANNEL (EAST CHANNEL,RM
74.4)
TIME(24 HR.)START:1235 END:1415
TBM 10:ADF&G MAINSTEM \~ESTBANK TBM RB
840915
GAGE NO:REMOVED
DATE:84 10 10
SITE FLOW:1.0 (cfs)l/
USGS DISCHARGE:14,700 (cfs)2/
GAGE READING START:DRY END:DRY
i"
I
-
-
,...
STATION THALWEG WSEL 3/
(ft )ELEVATION (ft)(ft)DESCRI PTION
04+95 92.64 DRY
06+14 93.16 DRY
07+36 94.50 DRY TRANSECT 2A STAFF GAGE 74.4S5
07+82 94.63 DRY
08+33 93.90 DRY TRANSECT 3
08+56 93.86 DRY
08+84 93.28 DRY
09+24 93.90 DRY TRANSECT 38 STAFF GAGE 74.4S7
09+61 94.60 DRY
10+19 95.36 DRY
11+02 97.16 DRY
1/Measured streamflow at time of the thalweg measurement ..
2/Mean daily mainstem discharge at Sunshine USGS gaging
station (15292780)corresponding to date of thalweg
measurement.
3/Water surface elevation determined at each thalweg point
during survey of thalweg profile.
c
C-3
Attachment Table C-4.Data used in plotting the thalweg profile of
Circular Side Channel.
LOCATION OF THALWEG:CIRCULAR SIDE CHANNEL (RM 75.3)
GAGE NO:REMOVED GAGE READING START:DRY END:DRY
DATE:84 10 10 TIME(24 HR.)START:0900 END:1140
SITE FLOW:0.0 (cfs)l/
(cfs)2/
TBM ID:ADF&G CIRCULAR TBM RB 840824
USGS DISCHARGE:14,500
STATION THALWEG WSEL 3/
(ft)ELEVATION (ft)(ft )DESCRIPTION
00+00 82.57 85.52
00+53 82.52 85.51
01+54 84.44 85.54
02+35 83.36 85.52
04+02 85.17 85.50
04+50 85.64 85.66
05+21 86.87 DRY
06+80 87.15 DRY
07+26 83.46 87.16
07+97 85.12 87.16
08+70 85.10 87.14
09+39 87.30 DRY TRANSECT 1 STAFF GAGE
75.3S1
10+34 87.86 DRY
11+41 88.32 DRY TRANSECT 2 STAFF GAGE
75.3S2
12+10 87.52 88.06 TRANSECT 2A STAFF GAGE
75.3S6
13+29 87.88 88.08
13+95 89.30 DRY TRANSECT 3 STAFF GAGE
75.3S3
14+90 89.48 DRY
16+33 89.13 DRY TRANSECT 4 STAFF GAGE
75.3S4
16+70 89.04 DRY
17+20 88.04 89.04
18+00 86.90 89.04 TRANSECT 5 STAFF GAGE
75.3S5
19+37 88.61 89.05
20+65 88.00 89.17
1/Measured streamflow at time of the thalweg measurement.
2/Mean daily mainstem discharge at Sunshine USGS gaging
station (15292780)corresponding to date of thalweg
measurement.
3/Water surface elevation determined at each thalweg point
during survey of thalweg profile.
C-4
-
Attachment Table C-4 (Continued).
STATION THALWEG WSEL 11
(ft)ELEVATION (ft)(ft )DESCRIPTION
21+14 88.63 89.14
21+51 89.35 DRY
21+82 88.85 89.06
22+49 88.13 89.07
f!'""22+98 88.62 89.04
23+34 89.08 DRY
23+84 88.53 88.93
24+17 88.93 DRY
24+70 87.47 88.90
25+00 86.64 88.90
~.25+32 88.84 88.94
25+95 88.86 DRY
26+62 88.76 DRY
27+56 90.06 DRY
,.-
I
'1
1/Water surface elevation determined at each thalweg point
.-during survey of thalweg profile .
,~
-C-5
"41,f
Attachment Table C-5.Data used in plotting the thalweg profile of
Sauna Side Channel.
LOCATION OF THALWEG:SAUNA SIDE CHANNEL (RM 79.8)
GAGE NO:79.8S28
DATE:84 10 09
SITE FLOW:1.0 (cfs)l/
USGS DISCHARGE:15,000 (cfs)2/
GAGE READING START:DRY END:DRY
TIME(24 HR.)START:1320 END:1500
TBM 10:ADF&G SAUNA TBM LB 840823
STATION
(ft)
THALWEG
ELEVATION (ft)
WSEL 3/
(ft)DESCRIPTION
00+00
00+79
01+43
02+09
03+05
03+99
05+16
06+21
06+99
07+68
08+54
09+09
09+68
10+27
10+80
11+76 .
12+59
13+25
13+69
14+06
14+28
14+45
14+57
87.49
87.68
84.44
87.43
88.06
88.31
88.60
88.70
88.83
88.87
84.79
87.48
88.57
87.50
88.94
89.20
89.74
90.00
88.98
87.01
87.56
90.33
87.79
87.67
87.87
87.84
87.86
88.28
88.51
88.75
88.90
89.00
89.00
88.99
88.90
88.92
89.02
89.00
DRY
DRY
DRY
DRY
89.16
89.02
DRY
88.84
TRANSECT 1 STAFF GAGE
79.8S1
TRANSECT 2 STAFF GAGE
79.8S2
TRANSECT 3 STAFF GAGE
79.8S3
TRANSECT 4 STAFF GAGE
79.8S4
JUNCTION WITH SIDE CHANNEL
1/Estimated .streamflow at time of the thalweg measurement.
2/Mean daily mainstem discharge at Sunshine USGS gaging
station (15292780)corresponding to date of thalweg
measurement.
3/Water surface elevation determined at each thalweg point
during survey of thalweg profile.
C-6
-
Attachment Table C-6.Data used in plotting the thalweg profile of
Sunset Side Channel.
LOCATION OF THALWEG:SUNSET SIDE CHANNEL (RM 86.9)
GAGE NO:86.9S1C
DATE:84 09 29
SITE FLOW:1.01 (cfs)l/2/
USGS DISCHARGE:17,400 (cfs)
GAGE READING START:0.47 END:0.47
TIME(24 HR.)START:1140 END:1430
TBM 10:ADF&G SUNSET TBM LB 840822
STATION
(ft)
THALWEG
ELEVATION (ft)
~JSEL3/
(ft)DESCRIPTION
00+00
00+52
01+41
02+81
03+70
04+43
05+37
.06+13
06+95
07+48
09+12
09+89
11+34
12+18
12+39
13+91
15+24
15+90
16+45
91.59
91.99
90.92
91.92
91.98
92.15
91.67
90.65
92.15 4/
92.30
92.92 4/
92.60
93.08
93.604/
93.40
92.97
92.01
93.60
94.34
92.08
92.31
92.31
92.29
92.39
92.57
92.61
92.53
92.58
92.70
93.18
93.26
93.34
93.85
93.79
93.85
93.83
93.86
94.60
TRANSECT O-STAFF GAGE
86.9S0
TRANSECT I-STAFF GAGE
86.9S1
TRANSECT 2-STAFF GAGE
86.9S2
TRANSECT 3-STAFF GAGE
86.9S3
~1/
2/
.-
3/,....
4/
'"""
Measured streamflow at time of the thalweg measurement.
Mean daily mainstem discharge at Sunshine USGS gaging
station (15292780)corresponding to date of thalweg
measurement..
Water surface elevation determined at each thalweg point
dur;'ng survey of thalweg profile.
Thalweg elevation determined at each thalweg point from
cross section profiles from the hydraulic model rather
than from the original thalweg survey.
C-7
Attachment Table C-6 (Continued).
1/
STATION THALWEG WSEL 1/
(ft )ELEVATION (ft )(ft )DESCRT PTION
17+40 94.20 4/94.62 TRANSECT 4-STAFF GAGE
86.9S4
18+06 94.40 94.69
19+78 92.30 94.71 TRANSECT 5-STAFF GAGE
86.9S5
21+34 92.20 4/94.72
22+38 90.60 94.82 TRANSECT 6-STAFF GAGE
86.9S6
23+72 92.07 94.73
24+88 93.33 94.73
25+21 94.57 94.74
26+45 95.04 95.20
28+31 95.75 95.91
29+64 96.32 96.48
Water surface elevation determined at each thalweg point
during survey of thalweg profile.
4/Thalweg elevation determined at each thalweg point from
cross section profiles from the hydraulic model rather
than from the original thalweg survey.
C-8
-
Attachment Table C-7.Data used in plotting the thalweg profile of
Trapper Creek Side Channel.
LOCATION OF THALWEG:TRAPPER CREEK SIDE CHANNEL (RM 91.6)
I"'"I
GAGE NO:91.6SIC GAGE READING START:0.72 END:0.72
DATE:84 09 13 TIME(24 HR.)START:1000 END:1224
SITE FLOW:16.4 (cfs)l/TBM 10:ADF&G TRAPPER TBM RB 840822
USGS DISCHARGE:22,700 (cfs)2/
STATION THALWEG WSEL 3/
(ft)ELEVATION (ft )(ft)DESCRIPTION
0+00 89.36 90.29
0+55 90.07 90.62
1+08 90.61 91.09
1+66 91.49 91.94
2+44 90.71 91.96
3+32 90.39 91.96r4+10 90.11 91.95
I 4+82 89.79 91.96
5+39 90.00 91.96 TRANSECT I-STAFF GAGE
91.6S2
6+23 90.21 91.96
7+23 90.42 91.95
8+25 90.60 91.98 TRANSECT 2-STAFF GAGE
I""".91.6S3
9+29 90.79 91.98
10+42 91.47 91.981-11+42 91.70 92.15 TRANSECT 3-STAFF GAGE
91.6S4
12+08 92.04 92.43
13+17 91.80 92.54 TRANSECT 4-STAFF GAGE
91.6S1
14+01 92.25 92.62
15+81 92.98 93.31
-1/Measured streamflow at time of the thalweg measurement.
2/Mean daily mainstem discharge at Sunshine USGS gaging
station (15292780)corresponding to date of thalweg
measurement.
3/Water surface elevation determined at each thalweg point
during survey of thalweg profile.
C-9
.
;
..
z
!:!....:;;
u
0...
0 ..
0 ::I
oJ ....
W ~...
"'z ..;.;:~..
zw w ...,'-...
..z E
oct =c.,._.....
:x::1L a_:r-.
O~~~~.;
>-=';:1iD!1.oa:v ..-.-)
We:>:~~~:Qw ozglZ:;cn~"'016.~W ....J ~~~~~O<l:z:::C ~~iiiQ~,q'"0;:)02"
g
oJ >U)~~w :
~Wa::oc(w~
>w::Ez-'
~!C~c~cn.w2 ....
;
Attachment Fi gure C-1 Thalweg profile of Island Side Channel study site.
C-I0
1 ~l 1 J 't )-1 -)
TI'l.lHSlc1 "
10+00
10"00
1"'111---1
TIIl.l'UI[Cl 5 lIU.NlEeT JA
I---
U.l"UCT:u.1_A",sECT :I ,U"'I[CT n
'+00
TU".tc:,Z
STREAMBED STATION I '..tl
---"'--_..._--------------_..._-_.._-_...~-----_...-.--=....~:::.....===:::;
.100'.''.lat
74 .•U
EAST BANI<MINOR CHANN£ls
SURVEY DATE,841010
WATER SURFACE ON SURVEY DATE,----
MEASURED SITE FLOW,<1.0 .1.
MAINSTEM DISCHARGE ISUNSHINH 14.aDD .ra
THALWEG GRADIENT:12.5 '""mill
STREAMBED STATION!h.,1
"
MAINSTEM WEST BANK SIDE CHANNEL
THALWEG PROFILE
!
z ..
S!
0-..>"I 0"'".J
'"'">;:..
.J
'"....
UANuet I
;"
o "0~
I"-I)a !~gl.l
..'INSTfM WEST BANK Sltl:~(:HANN£.l
.,
..
.,I I...lUll '1"--------{
0+00 ;i (t i 1 iii , •Iii 1 1 iii \, \ , , ,iii iii tit'
»
M'.....
PI
()
::T
3
III
:J
M'
"......
l.O
C
"'1
III
n
I
N
Vl-l
M'::T
CPIa........
'<~
III
Vlt.O......
.....-0
III "'1
n .0
I .....
I--'......
I--'......
III
0.....
3:.
PI z......":J 0
Vl ;:.......>
III '".J
3 '"'">:e:;:
III ..
.J
Vl '".....'"
OJ
PI
:J
7<:"
U"I......
a..
III
n
::T
PI
:J
;:l
III......
YIlANII[CT ~VIIIAJIlUC,IIu,t,..,IlCV i
CIRCULAR SIDE CHANNEL
THALWEG PROFILE
SURVEY DATE,841010
WATER SURFACE ON SURVEY DATE,
IlUSURED SITE fLOW,0.0 ch
IlAINSTEIl DISCHARGE «SUNSHINH 14,500 cia
THALWEG GRADIENT;14.3 'til/mil,
ifll6Ji:1S!lCT I
/'
o "'"'-----''h'l .....,..oas.c-.l
STREAIlBED STATION «".11
I ':."...,---J
'.i ,ii,iii iii iii iii iii iii,,50 i 00
0"1'"00 IHO(!IQ+OO 111""1'"00 110.00 li!!I+OO +
00
,.
.,
..
..
:t:>
rt
rt
QI
n::::r
3ro
~
rt
"Tl......
I.CI
C..
I'D
n
I
w
-l::::r
QI-:.E
I'D
I.CI
-0..
0n-nI......~-'N ro .0 .-n
~n 0
>=..........>..n -'c ..........QI >
>=....
-'Vl ..
0:......
CL
I'D
n
::::r
QI
~
~
I'D
-'
Vl
rte
CL
'<
Vl......
rt
I'D
1 l 1 1 ])>~J ))
TlIII.ltlUCT 4
10+00
TIiI.lNUCT :sTUN,rCf I
1+00
JUIIUCT I
STREAYBED STATION (hotl
SAUNA SIDE CHANNEL
THALWEG PROFILE
SURVEY DATE,B~IOOB
WATER SURFACE 011 SURVEY DATE,
ESTI .....TED SITE fLOW:"1.0 ."
..AINSTEY DISCHARGE fSUNSNINE"I~.BDO <to
THALWEG GRADIENT,10.~,••lImll•
·1 i tI'",..,.I I ''''.00':i ,i 'i '.iiiIi',i , ,'I 'iii ii"i '0+00
00
..
..
..
..L;;;;:=r ''''~-
..
:t>
H-
H-c:un::r
ffi::s
H-.,.,......
1.0
C
~co
n
I
.j::o
---i::rc:u
--'
~co
1.0
"0
~
0n--+,I ............
--'w co ..0
-+,z
0
t/'l i=..c:u >c ~:::l '"c:u
'"I :-
t/'l ;:..........J
0-....co
n::rc:u
:::l::sco
--'
Ul
H-e:
0-
'<
Ul.......
H-co
1 1)-1 1 1 )1 )1 J -..])
AOf.,GAG[
'165.
10+00
ADf!)G GAGE
1115'
.--------_..._----.._--_.......__....-_..._..--------_.-...
------_....._--------
STREAMBED STATION ('ul)
SU~YEY DATE,8.0~JS
WATE~SURFACE ON SURVEY DATE,--__
MUSU~ED SITE FLOW,18 ••,It
MAIN STEM DISCHARGE (SUNSHINE),22,100 ,.,
THALWEG GRADIENT:12.1 'ul/mil.
TRAPPER CREEK SIDE CHANNEL
THALWEG PROFILE
I
L~l ~'.~
1
4
....."..•~!~...J
111 fttt ''fAWner J ftll""SECT 4·1
s+oo
-----_..-.....
~50
huIA n ..1
»
rt
rt'
l:lJn:::r
3
(ll
:::J
M-
Ol
-0.
lO
C
""'S
ftl
n
I
0'1
..,r;
:::r
Q.I-:e:
ftl
lO
n "tJ
I ""'S.....0
U1 -t,.............
l'tI z
0
0 ;:
-t,..:-...
-l
-J...
""'S ...
PI :-
"tJ
;:..
-0 -J
l'tI ...
""'S '"
n
""'S
ftl
ftl ..
7":"
0+00
VI.....
e.
ftl
n:::r
OJ
:::J
:::J
It>......
AT T ACH MEN T 0
r-
I
-
-
---......--------------------,,-.--......---...--------------------------
ATTACHMENT Table 0-1 Cross secti ona 1 profi 1e data obtai ned at
Island Side Channel transect 1.
LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL AT TRANSECT 1.
GAGE NO:63.2S1A
DATE:84 09 01
yr.mo.day
GAGE READING:DRY
WSEL:91.69
TIME:1300
TBM ID ADF&G ISLAND TBM RB 1984
LBHP ID ADF&G TR1 LB 840725
RBHP ID ADF&G ISLAND S.C.TR1 RB 840725
TBM ELEVATION
LBHP ELEVATION
RBHP ELEVATION
100.00
95.99
98.81
-
-
STATION
00
00
02
12
14
16
20
30
40
48
52
54
60
70
80
88
92
102
112
120
126
128
134
138
142
150
156
162
168
172
176
RELATIVE
ELEVATION /1
96.00
95.7
95.6
95.1
94.8
94.4
94.2
94.2
94.0
93.6
93.8
93.9
93.5
93.3
93.4
93.0
93.0
92.8
92.7
92.4
91.9
91.69
91.0
90.4
90.3
90.7
90.6
90.1
89.1
89.1
89.1
0-1
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
ATTACHMENT TABLE 0-1 continued
180 89.4
182 89.6
186 90.6
187 91.69 RIGHT WATER SURFACE
187.1 95.3 UNDERCUT
192 97.6
194 98.2
196.5 98.4 GB RBHP /3
196.5 98.81 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-2
ATTACHMENT Table 0-2 Cross sectional profile data obtained at
Island Side Channel transect lA.
LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL AT TRANSECT.1A.
,-
GAGE NO:63.2S7B
DATE:84 09 01
yr.mo.day
TBM ID ADF&G ISLAND TBM RB 1984
LBHP ID ADF&G TRIA LB 840725
RBHP ID ADF&G ISLAND S.C.TRIA RB 840725
RELATIVE
STATION ELEVATION /1
00 96.25
00 95.9
02 95.9
10 95.3
18 94.6
28 94.3
32 94.4
34 94.3
44 94.3
50 93.6
52 93.3
62 93.1
68 93.5
78 93.7
84 93.6
86 93.6
96 93.3
106 92.9
116 92.6
126 92.2
132 91.9
134 91.69
140 91.0
146 90.5
150 90.3
154 90.0
160 89.8
164 89.2
168 88.5
D-3
GAGE READING:0.75
WSEL:91.69
TIME:1330
TBM ELEVATION 100.00
LBHP ELEVATION 96.23
RBHP ELEVATION 98.74
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
ATTACHMENT TABLE 0-2,cent inued
170
174
176
180
184
186
188
190
192
193
194
196
200
202
204
206
207
210
220
220.5
220.5
88.3
87.6
87.3
87.3
87.6
88.1
88.8
89.7
90.7
91.69
92.1
92.6
93.4
93.6
94.3
94.6
96.6
98.1
98.2
98.2
98.74
RIGHT WATER SURFACE
CUTBANK
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-4
ATTACHMENT Table D-3 Cross sectional profile data obtained at
Island Side Channel transect 2.
.-LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL AT TRANSECT 2•
-.
r
-
GAGE NO:63.2S2B
DATE:84 09 01
yr.mo.day
TBM ID ADF&G ISLAND TBM RB 1984
LBHP ID ADF&G TR2 LB 840725
RBHP ID ADF&G ISLAND S.C.TR2 RB 840725
RELATIVE
STATION ELEVATION /1
00 95.94
00 95.5
02 95.5
08 95.0
12 94.1
14 93.3
22 93.4
26 93.5
36 93.7
46 93.6
56 93.7
66 94.3
68 94.3
78 94.1
88 93.4
98 93.0
108 92.8
118 92.5
128 92.1
132 91.8
134 91.70
138 91.3
142 90.7
146 90.2
150 90.0
154 89.7
160 89.6
164 89.4
168 89.0
172 89.2
0-5
GAGE READING:0.46
WSEL:91.70
TIME:1400
TBM ELEVATION 100.00
LBHP ELEVATION 95.94
RBHP ELEVATION 99.05
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
ATTACHMENT TABLE 0-3.cont inued
176 89.8
178 90.2
180 90.8
183 91.7 RIGHT WATER SURFACE
184 94.9 ROOT MASS
186 96.3
188 97.5
190 98,3
193.2 98.5 GB RBHP /3
193.2 99,05 RBHP
/1 Elevation relative to 100.00 ft,assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-6
ATTACHMENT Table D-4 Cross sectional profile data obtained at
Island Side Channel transect 3.
LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL AT TRANSECT 3.
,....
-
-
GAGE NO:63.2S3B
DATE:84 09 01
yr.mo.day
rBM ID ADF&G ISLAND TBM RB 1984
LBHP ID ADF&G TR3 LB 840725
RBHP ID ADF&G ISLAND S.C.TR3 RB 840725
RELATIVE
STATION ELEVATION /1
00 96.26
00 95.7
02 95.6
05 95.3
06 94.9
14 94.3
20 94.3
30 94.4
40 94.3
50 94.3
58 94.3
68 93.8
72 93.7
82 93.2
92 93.0
102 92.9
112 92.7
122 92.4
132 92.0
141 91.68
144 91.4
154 91.2
160 91.2
164 91.3
172 91.4
182 91.4
188 90.8
190 90.3
0-7
GAGE READING:0.26
WSEL:91.68
TIME:1430
TBM ELEVATION 100.00
LBHP ELEVATION 96.26
RBHP ELEVATION 99.15
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
ATTACHMENT TABLE~.continued
194
19£
199
200
202
204
208
208
90.5
90.9
91.68
92.3
94.6
97.6
98.9
99.15
RIGHT WATER SURFACE
GB RBHP 13
RBHP
11 Elevation relative to 100.00 ft.assigned to the study site TBM.
12 Ground besides left bank headpin.
13 Ground besides right bank headpin.
D-8
ATTACHMENT Table 0-5 Cross sectional profile data obtained at
Island Side Channel transect 4.
LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL TRANSECT 4.
GAGE NO:63.2S4B
DATE:84 01
yr.day
GAGE READING:0.29
WSEL:91.68
TIME:1500
TBM ID ADF&G ISLAND TBM RB 1984 TBM ELEVATION 100.00
LBHP ID ADF&G TR4 LB 840725 LBHP ELEVATION 97.16
RBHP ID ADF&G ISLAND S.C.TR4 RB 840725 .RBHP ELEVATION 100.02
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
RIGHT WATER SURFACE
0-9
ATTACHMENT TABLE~.continued
186 92.5
188 97.3
190 97.5
192 98.6
196 99.5
198.2 99.5 GB RBHP /3
198.2 100.01 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-10
ATTACijMENT Tabl e 0-6 Cross sectional profile data obtained at
Island Side Channel transect 4A.
LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL AT TRANSECT 4A.
GAGE NO:63.2S8B
DATE:84 09 19
yr.mo.day
GAGE READING:DRY
WSEL:91.56
TIME:1340
,.''-.
~,
TBM ID ADF&G ISLAND TBM RB 1984 TBM ELEVATION 100.00
LBHP ID ADF&G TR4A LB 840725 LBHP ELEVATION 97.77
RBHP ID ADF&G ISLAND S.C.TR4A RB 840725 RBHP ELEVATION 99.04
-I
-
.~,
RELATIVE
STATION ELEVATION /1
00 97.77
00 97.3
05 97.1
11 95.3
14 95.1
15 95.1
25 94.1
28 93.7
29 93.7
39 93.1
49 92.7
53 92.5
54 92.4
64 91.9
71 91.56
72 91.5
76 91.3
80 91.1
84 91.0
88 90.9
92 90.9
96 91.0
100 91.2
104 91.3
108 91.3
112 91.0
114 91.1
118 91.0
122 91.0
126 91.2
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
t;;..
I D-l1
ATTACHMENT TABLE~.continued
130 91.3
133.5 91.56 RIGHT WATER SURFACE
144 91.9
146 92.5
147 92.8
152 93.8
162 93.6
172 93.5
176 93.0
178 93.3 BOTTOM RB
184 9409 TOP RB
194 94.8
200 95.2
201 95.2
215 98.0
217 98.4 GB RBHP /3
217 99.04 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-12
ATTACHMENT Table 0-7 Cross sectional profile data obtained at
Island Side Channel transect 5.
LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL TRANSECT 5.
GAGE NO:63.2S5B
DATE:84 09 19
yr.mo.day
GAGE READING:DRY
WSEL:91.57
TIME:1400
~.
TBM ID ADF&G ISLAND TBM RB 1984 TBM ELEVATION 100.00
LBHP ID ADF&G TR 5 LB 840725 LBHP ELEVATION 96.82
RBHP ID ADF&G ISLAND S.C.TR5 RB 840725 RBHP ELEVATION 99.68
RELATIVE
STATION ELEVATION /1
00 96.82
00 96.3
10 96.0
16 96.0
19 95.0
22 93.8
23 93.6
24 93.5
25 93.5
35 92.6
45 91.8
50 91.57
54 91.2
58 91.1
62 90.9
66 90.7
70 90.4
74 90.1
78 89.8
82 89.7
86 89.4
90 88.9
94 88.6
98 89.0
102 89.3
106 90.0
110 90.9
112.5 91.57
113 91.7
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
0-13
ATTACHMENT TABLE D-7.continued
117 92.9
118 93.2
119 93.7 BOTTOM RB
125 98.6 TOP RB
133 99.1 GB RBHP /3
133 99.69 RBHP
/1 Elevation relative to lOO.DO ft.assigned to the study site TBM.
/2 Ground beside Left bank headpin.
/3 Ground beside right bank headpin.
0-14
ATTACHMENT Table 0-8 Cross sectional profile data obtained at
Island Side Channel transect 6.
LOCATION OF CROSS SECTION:ISLAND SIDE CHANNEL AT TRANSECT 6.
GAGE NO:63.2S6B
DATE:84 09 19
yr.mo.day
GAGE READING:DRY
WSEL:91.57
TIME:1425
TBM ID ADF&G ISLAND TBM RB 1984 TBM ELEVATION 100.00
LBHP ID ADF&G TR 6 LB 840725 LBHP ELEVATION 97.25
RBHP ID ADF&G ISLAND S.C.TR 6 RB 840725 RBHP ELEVATION 99.41
RELATIVE
STATION ELEVATION /1
00 97.25
00 96.4
10·96.3
20 95.9
26 95.6
27 95.5
28 95.7
29 95.8
34 95.0
~35 94.9
45 94.3
55 93.7
56 93.5
66 '92.9
715 92.4
86 92.3
96 91.9
97 91.8
102 91.59
104 91.4
108 9i.1
112 90.6
116 90.0
120 89.3
124 89.1
125 89.2
128 89.0
132 89.3
136 89.8
_c'
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
0-15
ATTACHMENT TABLE 0-8.continued
140 90.7
143 91.54 RIGHT WATER SUFACE
144 91.9
148 93.7 BOTTOM RB
152 98.5 TOP RB
161 98.8 GB RBHP /3
161 99.42 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-16
ATTACHMENT Table D-9 -Cross sectional profi 1e data obtai ned at
Mainstem West Bank Side Channel transect 1.
LOCATION OF CROSS SECTION:MAINSTEM WEST BANK AT TRANSECT 1.
-
GAGE NO:74.4S1C
DATE:84 09 02
yr.mo.day
TBM ID ADF&G MAINSTEM w/B TBM RB 840915
LBHP ID REBAR
RBHP ID ADF&G 74.4S1 TR1 RB 840711
RELATIVE
STATION ELEVATION II
00 99.47
00 99.3
01 99.0
03 98.2
05 98.4
06 97.9
08 96.9
10 96.0
12 94.93
16 94.2
20 93.8
23 93.2
26 92.8
28 92.2
32 91.8
37 91.5
47 91.1
57 91.5
67 92.0
77 92.2
87 92.3
97 92.4
107 92.4
114 92.6
124 93.1
132 93.7
136 94.0
142 94.5
D-17
GAGE READING:1.50
WSEL:94.96
TIME:1230
TBM ELEVATION 100.00
LBHP ELEVATION 99.47
RBHP ELEVATION 99.96
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
ATTACHMENT TABLE~.continued
147 94.6
152.5 94.93 RIGHT WATER SURFACE
157 95.1
167 95.5
171 95.6
175 96.0
178 96.1
186 96.7
193 97.5
200 97.8
206 98.4 HIGH WATER MARK
211 99.0
217 98.5
219 98.0
221 97.7
226 98.2
233 98.6
235 99.7
236 99.7 GB RBHP /3
236 99.97 RBHP
"
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
13 Ground beside right bank headpin.
D-18
ATTACHMENT Table 0-10 Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect 2.
LOCATION OF CROSS SECTION:MAINSTEM WEST BANK AT TRANSECT 2.
-
GAGE NO:74.4S2C
DATE:84 09 02
yr.mo.day
TBM ID ADF&G MAINSTEM W/B TBM RB 840915
LBHP ID REBAR
RBHP ID ADF&G 74.4S2 TR2 RB 840711
RELATIVE
STATION ELEVATION /1
00 100.65
00 100.3
01 100.3
03 99.3
04 98.7
05 95.6
08 94.97
12 94.4
19 93.8
27 93.3
37 92.4
47 91.6
57 91.7
67 92.0
77 92.5
87 92.6
97 92.8
107 92.7
117 93.1
127 94.0
137 94.7
142.5 94.97
147 95.2
157 96.0
167 96.7
171 96.9
173 97.1
0-19
GAGE READING:1.46
WSEL:94.99
TIME:1500
TBM ELEVATION 100.00
LBHP ELEVATION 100.65
RBHP ELEVATION 100.03
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
RIGHT WATER SURFACE
ATTACHMENT TABLE 0-10.continued
180 97.8
187 98.3
192 98.5 HIGH WATER MARK
197 99.1
200 98.6
204 98.2
212 98.9
216 99.8
217 99.9 GB RBHP /3
217 100.04 RBHP TR 2
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-20
ATTACHMENT Table 0-11 Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect
2A.
LOCATION OF CROSS SECTION:MAINSTEM WEST BANK AT TRANSECT 2A.
""'"I
GAGE NO:74.4S5C
DATE:84 09 03
yr.mo.day
GAGE READING:0.56
WSEL:94.90
TIME:1230
TBM ID ADF&G MAINSTEM W/B TBM RB 840915
LBHP ID REBAR
RBHP ID REBAR
TBM ELEVATION
LBHP ELEVATION
RBHP ELEVATION
100.00
96.53
99.38
-
RELATIVE
STATION ELEVATION /1
00 96.53
00 96.1
01 96.1
04 96.1
08 95.9
18 95.5
28 95.4
34 94.85
36 94.7
38 94.5
40 94.5
42 94.5
44 94.5
46 94.6
48 94.6
50 94.9
60 95.5
70 95.3
80 95.9
88 96.4
89 96.5
90 96.6
94 98.4
96 98.5
99 99.1
99 99.37
DESCRIPTION
LBHP
GB LBHP /21
LEFT WATER SURFACE
RIGHT WATER SURFACE
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-21
ATTACHMENT Table 0-12 Cross secti ana 1 profil e data obtai ned at
Mainstem West Bank Side Channel transect 3.
LOCATION OF CROSS SECTION:MAINSTEM WEST BANK AT TRANSECT 30
GAGE NO:74.4S3C
DATE:84 09 02
yr.mo.day
TBM ID ADF&G MAINSTEM W/B TBM RB 840915
LBHP ID REBAR
RBHP ID ADF&G 74.4S3 TR3 RB 840711
RELATIVE
STATION ELEVATION /1
00 101.16
00 10009
01 100.8
03 10L2
04 97.6
07 97.3
08 96.5
11 95.18
15 94.4
18 93.8
25 93.1
32 9301
42 92.7
52 92.8
62 92.9
72 9303
82 93.7
92 94.7
98 95.18
102 95.5
112 96.1
122 96.3
126 96.4
134 96.6
138 96.99
140 96.7
150 96.5
160 96.5
165 96.7
GAGE READING:1.50
WSEL:95.18
TIME:1600
TBM ELEVATION 100.00
LBHP ELEVATION 101.16
RBHP ELEVATION 101003
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
MIDDLE.GRAVEL BAR
0-22
ATTACHMENT TABLE 0-12.continued
170
171
181
191
201
211
217
219
220
225
229
229.5
229.5
96.3
96.2
95.5
94.89
94.4
93.9
94.3
94.9
99.5
100.6
100.9
101.0
101.04
LEFT WATER SURFACE
RIGHT WATER SURF.BOTTOM RB
GB RBHP /3
RBHP
-
-
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
"
D-23
ATTACHMENT Table 0-13 Cros~obtained from Task'
Mainstelll .984 field season.
3A.
LOCATION OF CROSS SECTION:MAINSTEM WEST BANK AT TRANSECT 3A.
GAGE NO:74.4S6C GAGE READING:1.82
DATE:84 09 03
yr.mo.day
TBM ID ADF&G MAINSTEM W/B TBM RB 840915
LBHP ID REBAR
RBHP ID NO REBAR
RELATIVE
STATION ELEVATION /1
00 101.15
00 100.8
01 100.7
03 100.4
04 97.7
as 98.6
08 98.1
10 96.9
11 95.8
12 95.09
14 94.2
24 94.0
25 93.4
26 93.4
32 93.2
35 93.3
40 93.3
50 93.2
60 93.0
66 93.0
76 93.2
86 93.8
96 94.8
100.5 95.2
110 95.8
120 96.2
130 96.4
140 96.6
145 96.7
146 96.8
146 96.93
WSEL:95.20
TIME:1100
TBM ELEVATION 100.00
LBHP ELEVATION 101.15
RBHP ELEVATION 96.92
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
RIGHT WATER SURFACE
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-24
-
ATTACHMENT Table 0-14 Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect
3B.
LOCATION OF CROSS SECTION:MAINSTEM WEST BANK AT TRANSECT 3B.
GAGE NO:74.4S7C
DATE:84 09 03
yr.mo.day
GAGE READING:1.20
WSEL:95.06
TIME:1220
TBM ID ADF&G MAINSTEM W/B TBM RB 840915 TBM ELEVATION 100.00
LBHP ID REBAR LBHP ELEVATION 97.91
RBHP ID REBAR RBHP ELEVATION 102.02
RELATIVE
STATION ELEVATION /1
00 97.91
00 97.6....01 97.5
08 97.2
11 97.0
19 97.1
20 97.0
30 96.7
40 95.9
46 95.4
49 94.84
51 94.6
53 94.3
55 94.1
57 93.9
59 94.0
61 94.4
62 94.5
66 101.0
67.5 101.6
67.5 102.02
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
RIGHT WATER SURFACE
GB RBHP /3
RBHP
"""I
r
r
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-25
ATTACHMENT Table D-15 Cross sectional profile data obtained at
Mainstem West Bank Side Channel transect 4.
LOCATION OF CROSS SECTION:MAINSTEM WEST BANK AT TRANSECT 4.
GAGE NO:74.4S4C
DATE:84 09 02
yr.mo.day
TBM ID ADF&G MAINSTEM W/B TBM RB 840915
LBHP ID REBAR
RBHP ID ADF&G 74.4S4 TR4 RB 840711
RELATIVE
STATION ELEVATION II
00 100.03
00 99.7
01 99.7
06 99.5
10 99.1
20 98.8
30 98.5
33 98.3
35 96.7
35.5 96.44
38 95.3
41 95.0
51 94.7
61 94.7
71 95.0
81 95.0
91 95.0
101 95.1
III 95.4
121 95.6
131 95.7
141 95.9
144 96.1
148 96.0
156 96.3
161 96.1
163 96.2
168.5 96.5
GAGE READING:0.83
WSEL:96.53
TIME:1715
TBM ELEVATION 100.00
LBHP ELEVATION 100.03
RBHP ELEVATION 100.99
DESCRIPTION
LBHP
GB LBHP 12
TOP LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
D-26
ATTACHMENT TABLE 0-15.continued
173 96.9
183 97.0
193 96.8
203 97.1-213 97.4
223 97.6
233 98.3
I"""237 98.3
246 98.5
248 98.3
252 98.2-254 97.3
256 96.9
261 96.8
..-265 98.6
268 98.7
269 99.2
271 99.5
278 99.4
286 99.3
288 99.3
297 99.1
313 98.8
331 100.9 GB RBHP /3
331 100.99 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
""'"/3 Ground beside right bank headpin.
....
-0-27
ATTACHMENT Table D-16 Cross sectional profile data obtained at
Circular Side Channel transect 1~
LOCATION OF CROSS SECTION:CIRCULAR SIDE CHANNEL AT TRANSECT 1.
GAGE NO:75.3S1 GAGE READING:NO READING TAKEN
DATE:84 09 05 WSEL:87.67
yr.mo.day
TIME:0900
IBM ID ADF&G CIRCULAR IBM RB 840824 TBM ELEVATION 100.00
LBHP ID ADF&G TRI LB 840724 LBHP ELEVATION 94.06
RBHP ID ADF&G CIRCULAR S.C.TRI RB 1984 RBHP ELEVATION 94.06
RELATIVE
STATION ELEVATION /l
00 94.06
00 93.7
07 94.1
13 91.7
15 91.3
26 91.0
36 90.5
46 89.9
56 89.3
63 88.9
72 88.4
74 88.3
84 87.9
94 87.6
101 87.64
104 87.6
114 87.4
124 87.3
134 87.5
142 87.69
146 88.1
150 89.2
154 89.6
156 90.2
159 91.8
160.6 93.7
160.6 94.06
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
RIGHT WATER SURFACE
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-28
..-..-.._---_.__.------"--'--'~~'----~'~-'-.-------_._..-
-ATTACHMENT Table D-17 Cross sectional profile data obtained at
Circular Side Channel transect 2•.
LOCATION OF CROSS SECTION:CIRCULAR SIDE CHANNEL AT TRANSECT 2.
GAGE NO:75.3S2
DATE:84 09 05
yr.mo.day
GAGE READING:NO READING TAKEN
WSEL:88.45
TIME:0930
TBM ID ADF&G CIRCULAR TBM RB 840824 TBM ELEVATION 100.00
LBHP ID ADF&G TR2 LB 840724 .LBHP ELEVATION 96.50
RBHP ID ADF&G CIRCULAR S.C.TR2 RB 840724 RBHP ELEVATION 99.Q6
-RELATIVE
STATION ELEVATION /1
00 96.50
00 96.1
04 95.9
10 90.8
13 89.6
23 89.3
24 89.4
34 89.5
44 89.5
54 89.6
64 89.9
70 89.7
71 89.6
81 89.5
90 89.3
91 89.3
101 88.8
111 88.5
114 88.45
124 88.4
126 88.3
131 88.5
136 88.7
145 88.7
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
D-29
ATTACHMENT TABLE D-17.continued
146 88.6
153 88.8
154 89.0
158 90.8 BOTTOM RB
159 93.3
166 99.0 TOP RB
169 99.2 GB RBHP /3
169 99.66 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-30
ATTACHMENT Table 0-18 Cross sectional profile data obtained at
Circular Side Channel transect 2A.
LOCATION OF CROSS SECTION:CIRCULAR SIDE CHANNEL AT TRANSECT 2A.
,....
I
GAGE NO:75.3S6
DATE:84 09 05
yr.mo.day
GAGE READING:NO READING TAKEN
WSEL:88.65
TIME:1000
TBM ID ADF&G CIRCULAR TBM RB 840824 TBM ELEVATION 100.00
LBHP ID ADF&G TR2A LB 840724 LBHP ELEVATION 99.46
RBHP ID ADF&G CIRCULAR S.C.TR2A RB 840724 RBHP ELEVATION 99.68
..-
I'"""
I
STATION
00
00
07
12
14
16
17
19
20
25
27
28
38
45
56
57
67
77
87
97
107
113
114
124
125
135
137
148
149
RELATIVE
ELEVATION /1
99.46
98.9
98.3
94.6
90.2
89.5
89.02
88.6
88.7
89.02
89.1
89.3
89.2
89.9
89.9
90.0
90.5
90.3
90.3
90.2
90.3
90.3
90.2
90.0
90.0
89.3
89.1
88.65
88.4
D-31
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB UNDERCUT
INUNDATED LOGS
LEFT WATER SURFACE
RIGHT WATER SURFACE
LEFT WATER SURF.MAIN CHANNEL
ATTACHMENT TABLE D-18.continued
159
169
170
172
173
175
176
181
184
187
188
190
192.5
192.5
87.6
88.6
88.65
88.8
89.1
89.6
89.8
92.6
94.2
95.5
98.2
99.2
99.4
99.70
RIGHT WATER SURF.MAIN CHANNEL
BOTTOM OF CUT BANK
TOP RB
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-32
'""'
f"'"
I.,
ATTACHMENT Table 0-19 Cross sectional profile data obtained at
Circular Side Channel transect 3.
LOCATION OF CROSS SECTION:CIRCULAR SIDE CHANNEL AT TRANSECT 3.
-
GAGE NO:75.3S3
DATE:84 09 05
yr.mo.day
TBM ID ADF&G CIRCULAR TBM RB 840824
LBHP ID ADF&G TR3 LB 840724
RBHP ID ADF&G CIRCULAR S.C.TR3 RB 1984
RELATIVE
STATION ELEVATION /1
00 99.08
00 98.6
01 98.6
06 97.8
11 93.0
13 91.2
16 90.4·
27 90.3
28 90.3
38 90.7
48 90.7
58 90.8
59 90.9
69 90.8
79 90.6
89 90.5
99 90.1
109 90.0
119 89.9
125 89.9
126 89.9
136 89.7
139 89.51
149 89.1
159 89.3
163 89.49
174 91.0
178 90.9
179 90.9
GAGE READING:NO READING TAKEN
WSEL:89.50
TIME:1030
TBM ELEVATION 100.00
LBHP ELEVATION 99.08
RBHP ELEVATION 96.09
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
D-33
ATTACHMENT TABLE 0-19.continued
189 91.3
199 91.7
204 92.5
211 93.9 HIGH WATER MARK
213 95.1
214.5 95.8 GB RBHP /3
214.5 96.10 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-34
-
-
ATTACHMENT Table D-20 Cross sectional profile data obtained at
Circular Side Channel transect 4.
LOCATION OF CROSS SECTION:CIRCULAR SIDE CHANNEL AT TRANSECT 4.
--
-
GAGE NO:75.3S4
DATE:84 09 05
yr.mo.day
TBM ID ADF&G CIRCULAR TBM RB 840824
LBHP ID ADF&G TR4 LB 840724
RBHP ID ADF&G CIRCULAR S.C.TR4 840710
RELATIVE
STATION ELEVATION /1
00 97.56
00 97.1
01 96.8
08 95.6
10 94.4
14 92.2
15 91.9
16 91.8
22 91.7
24 91.7
34 91.5
44 91.3
45 91.4
55 90.9
65 90.5
75 90.0
78 89.80
88 89.4
98 89.2
108 89.1
118 89.3
122 89.5
123 89.5
132 89.4
133 89.4
142 89.81
152 90.9
153 91.0
163 91.5
GAGE READING:NO READING TAKEN
WSEL:89.81
TIME:1100
TBM ELEVATION 100.00
LBHP ELEVATION 97.56
RBHP ELEVATION 97.85
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
0-35
ATTACHMENT TABLE 0-20.continued
168 91.6
169 91.7
173 92.3 BOTTOM RB
177 93.9
178 94.01
188 93.7
198 93.7
202 94.3
209 96.5
212 97.7 GB RBHP /3
212 97.84 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-36
ATTACHMENT Tab 1e D-21 Cross sectional profile data obtained at
Circular Side Channel transect 5.
LOCATION OF CROSS SECTION:CIRCULAR SIDE CHANNEL AT TRANSECT 5.
GAGE NO:75.3S5
DATE:84 09 05
yr.mo.day
TBM ID ADF&G CIRCULAR TBM RB 840824
LBHP ID ADF&G TRS LB 840724
RBHP ID ADF&G CIRCULAR S.C.TRS RB 840724
GAGE READING:NO READING TAKEN
WSEL:89.77
TIME:1130
TBM ELEVATION 100.00
LBHP ELEVATION 98.00
RBHP ELEVATION 96.59
RELATIVE
STATION ELEVATION /1 DESCRIPTION
00 98.00 LBHP
00 97.4 GB LBHP /2
01 97.3
04.5 96.9 TOP LB
06 93.8 BOTTOM LB
10 91.9
14.5 89.76 LEFT WATER SURFACE
24 89.2
29 89.8 RIGHT WATER SURFACE
35 90.3 TOP OF GRAVEL BAR
40 89.78 LEFT WATER SURFACE
50 89.0
60 88.1
68 87.0
70 86.9
80 88.3
90 89.6
95 89.7 RIGHT WATER SURFACE
105 90.7
115 91.5
125 91.4
135 91.4
145 92.8
155 93.5
165 93.7
175 93.1
185 92.0
195 92.4
0-37
ATTACHMENT TABLE D-21.continued
205
211
214
219
226
226.5
226.5
91.5
90.7
93.9
95.1
95.8
96.2
96.57
BOTTOM OF CUT BANK,OVERHANGING
TOP OF CUT BANK
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-38
",...
ATTACHMENT Tab 1e 0-22 Cross sect;ana 1 profil e data obtai ned at
Sauna Side Channel transect 1.
-
RELATIVE
STATION ELEVATION /1
00 96.33
00 95.9
03 93.9
06 92.9
07 90.3
17 89.1
22 88.75
23 88.6
24 88.75
34 89.1
44 89.2
54 89.3
64 89.6
74 91.2
84 91.6
94 91.9
95 91.9
105 92.0
115 93.4
123.3 94.1
123.3 94.46
DESCRIPTION
LBHP
GB LBHP /2.MID-BANK
BOTTOM LB
LEFT WATER SURFACE
THALWEG
RIGHT WATER SURFACE
BOTTOM RB
TOP RB
BOTTOM OF RB
GB RBHP /3
RBHP
,rr-/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
-0-39
ATTACHMENT Table 0-23 Cross sectional profile data obtained at
Sauna Side Channel transect 2.
LOCATION OF CROSS SECTION:SAUNA SIDE CHANNEL AT TRANSECT 2.
GAGE NO:79.8S2C
DATE:84 09 15
yr.mo.day
GAGE READING:DRY
WSEL:89.00
TIME:1430
TBM ID ADF&G SAUNA TBM LB 840823
LBHP ID ADF&G SAUNA S.C.TR2 LB 1984
RBHP ID ADF&G TR2 RB 840723
TBM ELEVATION
LBHP ELEVATION
RBHP ELEVATION
100.00
92.94
95.38
RELATIVE
STATION ELEVATION /1
00 92.94
00 92.6
01.5 91.2
10 89.6
17 89.00
19 88.9
23 89.00
33 89.2
43 89.4
51 89.7
59 91.2
69 9105
79 92.0
81 92.1
91 93.5
96 94.4
97.3 94.5
97.3 95.40
DESCRIPTION
LBHP
GB LBRP /2
BOTTOM LB .
LEFT WATER SURFACE
THALWEG
RIGHT WATER SURFACE
BOTTOM RB
RB-TOP
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-40
ATTACHMENT.Tab 1e 0-24 Cross sectional profile data obtained at
Sauna Side Channel transect 3.
LOCATION OF CROSS SECTION:SAUNA SIDE CHANNEL AT TRANSECT 3.
GAGE NO:79.8S3C
DATE:84 09 05
yr.mo.day
GAGE READING:DRY
WSEL:88.97
TIME:1300
TBM ID ADF&G SAUNA TBM LB 840823
LBHP ID ADF&GSAUNA S.C.TR3 LB 840723
RBHP ID ADF&G TR3 RB 840723
TBM ELEVATION
LBHP ELEVATION
RBHP ELEVATION
100.00
99.33
93.84
RELATIVE
STATION ELEVATION /1
00 99.33
00 98.8
01 98.9
03 98.8
04 96.6
07 95.1
08 94.7
18 91.5
28 89.2
3'0.5 88.97
40 87.5
50 87.4
60 88.2
63.5 88.6
73 91.4
83 91.8
93 92.0
103 92.3
108 92.2
118 92.2
128 92.4
138 92.8
148 93.0
158 93.2
168 93.1
178 93.1
188 93.2
192.5 93.1
192.5 93.87
DESCRIPTION
LBHP'
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
RB
GB RBHP /3
RBHP
....
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin •
0-41
ATTACHMENT Table D-25 Cross sectional profile data obtained at
Sauna Side Channel transect 4.
LOCATION OF CROSS SECTION:SAUNA SIDE CHANNEL AT TRANSECT 4.
GAGE NO:79.8S4C GAGE READING:1.36
DATE:84 09 05 WSEL:88.99
yr.mo.day
TIME:1330
TBM ID ADF&G SAUNA TBM LB 840823 TBM ELEVATION 100.00
LBHP ID ADF&G SAUNA S.C.TR4 LB 840723 LBHP ELEVATION 100.57
RBHP ID ADF&G TR4 RB 840723 RBHP ELEVATION 93.82
RELATIVE
STATION ELEVATION /1
00 100.57
00 100.0
07 99.8
08 95.4
10 93.7
13 91.9
18 89.6
21 88.99
22 88.0
24 87.5
27 87.8
31 88.8
.35 90.1
45 90.5
55 90.6
65 91.3
75 91.3
85 91.9
95 92.5
98 92.3
101 91.9
111 91.9
116 92.3
117 92.4
127 92.9
137 93.6
139 93.6
141 93.5
141 93.83
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
RIGHT WATER SURFACE
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-42
-ATTACHMENT Table 0-26 Cross sectional profile data obtained at
Sunset Side Channel transect O.
-LOCATION OF CROSS SECTION:SUNSET SIDE CHANNEL AT TRANSECT O.
-
GAGE NO:86.9S0C
DATE:84 09 14
yr.mo.day
TBM ID ADF&G SUNSET TBM LB 840822
LBHP ID ADF&G TRO LB 840722
RBHP ID ADF&G 86.9S0 TRO 840722
GAGE READING:DRY
WSEL:92.81
TIME:1400
TBM ELEVATION 100.00
LBHP ELEVATION 101.66
RBHP ELEVATION 100.47
-
.....
I
STATION
00
00
07
10
14
24
26
29
39
49
55
58
68
73
74
84
91
92
102
112
122
132
133
143
153
163
173
183
193
203
RELATIVE
ELEVATION /1
101.66
101.0
100.4
96.7
95.2
94.5
94.4
92.8
93.2
93.5
92.80
92.2
92.7
92.6
92.6
92.81
93.3
93.4
94.0
94.2
94.4
94.6
94.6
94.6
94.7
94.6
94.5
94.6
94.7
94.8
0-43
DESCRIPTION
LBHP
GB LBHP /2
TOP OF CUT BANK
BOTTOM LB
LEFT WATER SURFACE
THALWEG
RIGHT WATER SURFACE
ATTACHMENT TABLE 0-26.continued
213 94.9
223 95.1
233 95.3
243 95.5
244 95.5
254 95.8
264 96.1
274 96.5
284 96.6
285 96.8
295 97.2
305 97.3
315 97.5
317 97.9 BOTTOM RB
320 98.4 TOP RB
330 99.5
340 99.4
341 99.4 GB RBHP /3
341 100.46 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-44
-ATTACHMENT Table D-27 Cross sectional profile data obtained at
Sunset Side Channel transect 1.
-
-
.....,
.....
-
-
-,
LOCATION OF CROSS SECTION:SUNSET SIDE CH&~NEL AT TRANSECT 1.
GAGE NO:86.9S1C GAGE READING:0.49
DATE:84 09 13 WSEL:93.27
yr.mo.day
TIME:1440
TBM ID ADF&G SUNSET TBM LB 840822 TBM ELEVATION 100.00
LBHP 10 ADF&G TR1 LB 840722 LBHP ELEVATION 100.36
RBHP ID ADF&G 86.9S1 TR1 840709 RBHP ELEVATION 99.43
RELATIVE
STATION ELEVATION /1 DESCRIPTION
00 100.36 LBHP
00 100.0 GB LBHP /2
03 100.0 TOP LB
06 98.7
07 98.6
17 96.5
18 96.2 BOTTOM LB
28 95.1
38 94.8
48 94.2
58 93.5
62.5 93.28 LEFT WATER SURFACE
67 92.9 THALWEG
68 93.0
78 93.2
88 93.3
98 93.2
102 93.26 RIGHT WATER SURFACE
110 93.6
112 93.19 BACKWATER POOL LEFT WATER SURF.
122 93.17 BACKWATER POOL RIGHT WATER SURF.
132 93.9
142 94.1
152 94.3
162 94.6
172 94.8
182 95.2
192 95.5
202 95.7
0-45
ATTACHMENT TABLE 0-27.continued
212 96.0
222 96.1
223 96.2
233 96.3
243 96.5
253 96.8
263 97.4
273 97.7
283 98.2
293 98.7
303 99.3
304 99.4 GB RBHP /3
304 99.45 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-46
ATTACHMENT Tab 1e D-28 Cross sectional profile data obtained at
Sunset Side Channel transect 2.
LOCATION OF CROSS SECTION:SUNSET SIDE CHANNEL AT TRANSECT 2.
GAGE NO:86.9S2B GAGE READING:0.32
DATE:84 09 14 WSEL:93.83
yr.mo.day
TIME:1500
f""'.
TBM ID ADF&G SUNSET TBM LB 840822 TBM ELEVATION 100.00
LBHP ID ADF&G TR2 LB 840722 LBHP ELEVATION 100.49..-RBHP ID ADF&G 86.9S2 TR2 840709 RBHP ELEVATION 99.88
RELATIVE
STATION ELEVATION /1 DESCRIPTION
00 100.49 LBHP
00 100.0 GB LBHP /2
03 99.9 TOP LB
08 96.7 BOTTOM LB
15 97.2
16 97.3
26 96.4
r'36 96.2
46 96.4
56 96.1
66 95.7.-76 95.4
77 95.3
87 95.1
90 95.0
91 95.0
95 94.7
96 94.7
106 94.6
116 94.2
126 94.0
136 93.8
139 93.81 LEFT WATER SURFACE
149 93.6 THALWEG
r""159 93.7
164 93.8
165 93.8-170 93.84 RIGHT WATER SURFACE
-0-47
ATTACHMENT TABLE 0-28.continued
180 94.0
190 94.4
191 94.4
201 94.8
211 95.1
221 95,6
231 95,8
233 95.8
238 96.1 BOTTOM RB
242 97.2
247.5 99.7 GB RBHP /3
247.5 99.88 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-48
ATTACHMENT Table 0-29 Cross sectional profile data obtained at
Sunset Side Channel transect 3.
LOCATION OF CROSS SECTION:SUNSET SIDE CHANNEL AT TRANSECT 3.
GAGE NO:86.9S3B
DATE:84 09 14
yr.mo.day
TBM ID ADF&G SUNSET TBM LB 840822
LBHP ID ADF&G TR3 LB 840722
RBHP 1D ADF&G 86.954 TR4 840709
GAGE READING:1.12
WSEL:93.85
TIME:1525
TBM ELEVATION 100.00
LBHP ELEVATION 100.32
RBHP ELEVATION 104.29
-I
r
STATION
00
00
05
08
11
12
14
18
23
28
29
39
49
59
69
79
89
90
100
110
111
121
122
132
142
152
162
165.5
RELATIVE
ELEVATION /1
100.32
100.0
100.0
99.1
97.6
97.1
96.3
95.6
96.1
95.6
95.5
95.6
95.7
95.8
95.9
95.8
95.5
95.4
95~2
·95.1
95.1
94.8
94.8
94.6
94.5
·94.5
94.3
93.86
D-49
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
ATTACHMENT TABLE D-29.continued
175 92.8
176 92.7
185 92.0 THALWEG
195 92.5
204 93.84 RIGHT WATER SURFACE
208 95.5 BOTTOM RB
217 104.2
219 104.2 GB RBHP /3
219 104.28 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-50
.-
i
ATTACHMENT Table D-30 Cross sectional profile data obtained at
Sunset Side Channel transect 4..
LOCATION OF CROSS SECTION:SUNSET SIDE CHANNEL AT TRANSECT 4.
.-
......
GAGE NO:86.9S4B
DATE:84 09 14
yr.mo.day
TBM ID ADF&G SUNSET TBM LB 840822
LBHP In ADF&G TR4 LB 840722
RBHP In ADF&G 86.9S~TR4 840709
RELATIVE
STATION ELEVATION /1
00 101.62
00 101.3
06 100.5
10 98.1
12 96.4
14 95.9
18 95.5
28 95.6
31 95.5
32 95.5
42 95.8
52 96.0
62 96.0
67 96.0
68 96.0
78 95.8
83 95.6
93 95.2
103 94.9
113 94.57
120 94.4
123 94.4
124 94.4
134 94.4
137 94.53
142 94.7
143 94.8
153 95.3
163 95.4
173 95.4
GAGE READING:0.74
WSEL:94.55
TIME:1615
TBM ELEVATION 100.00
LBHP ELEVATION 101.62
RBHP ELEVATION 104.26
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
THALWEG
RIGHT WATER SURFACE
D-51
ATTACHMENT TABLE 0-30.continued
183
193
200
201
204
205
207
208
212
213
218
221
222
224
229
230
231
234
238
243
243
95.4
95.1
94.9
94.8
94.9
94.8
94.7
95.0
95.0
94.7
94.7
94.4
94.4
94.28
93.8
94.27
94.6
95.9
102.3
103.9
104.26
LEFT WATER SURFACE
BOTTOM RB
TOP RB
GB RBHP /3
RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Grountl beside left bank headpin.
/3 Ground beside right bank headpin.
0-52
-I
I
ATTACHMENT Table 0-31 Cross sectional profile data obtained at
Sunset Side Channel transect 5.
LOCATION OF CROSS SECTION:SUNSET SIDE CHANNEL AT TRANSECT 5.
r
I
-
-
-
GAGE NO:86.9S5B
DATE:84 09 14
yr.mo.day
TBM ID ADF&G SUNSET TBM LB 840822
LBHP ID ADF&G TR5 LB 840722
RBHP ID ADF&G 86.955 TR5 840709
RELATIVE
STATION ELEVATION /1
00 100.61
00 100.1
03 99.7
08 98.7
11 97.7
13 98.0
23 97.6
30 96.8
31 96.7
35 96.6
36 96.6
37 96.6
38 96.5
39 96.6
45 96.5
46 96.4
51 96.4
52 96.4
62 96.3
72 96.0
79 95.7
80 95.6
90 95.3
100 94.8
102 94.74
112 94.2
.122 93.6
132 93.1
137 92.8
138 92.8
GAGE READING:1.14
WSEL:94.74
TIME:1710
TBM ELEVATION 100.00
LBHP ELEVATION 100.61
RBHP ELEVATION 102.42
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
0-53
ATTACHMENT TABLE 0-31.continued
148 92.6
157 92.4
158 92.3
162 92.3 THALWEG
165 92.4
166 92.4
172 93.0
175 92.8
176 92.8
181 93,5
182 93,6
186 93.7
187 94.1
191 94.73 RIGHT WATER SURFACE
195 95.3
196 95.7
201 96.9 BOTTOM RB
202 100,0 TOP RB
205 101.7
210 102.3 GB RBHP /3
210 RBHP ELEVATION NOT SHOT
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-54
ATTACHMENT Table D-32 Cross sectional profile data obtained at '
Sunset Side Channel transect 6.
LOCATION OF CROSS SECTION:,SUNSET SIDE CHANNEL AT TRANSECT 6.
-
GAGE NO:86.9S6C
DATE:84 09 14
yr.mo.day
TBM ID ADF&G SUNSET TBM LB 840822
LBHP ID ADF&G TR6 LB 840722
RBHP ID ADF&G 86.956 TR6 840722
RELATIVE
STATION ELEVATION /1
00 100.71
00 100.5
02 99.8
09 100.3
11 99.6
12 99.1
21 98.7
22 98.6
32 98.2
42 97.7
52 96.9
62 96.1
72 95.3
80 94.74
90 93.9
100 93.2
110 92.5
113 92.3
114 92.2
118 91.9
124 91.7
130 91.2
131 91.1
134 90.8
139 90.7
145 90.9
GAGE READING:0.45
WSEL:94.77
TIME:1800
TBM ELEVATION 100.00
LBHP ELEVATION 100.71
RBHP ELEVATION 103.13
DESCRIPTION
LBHP
GB LBHP /2
TOP LB
BOTTOM LB
LEFT WATER SURFACE
THALW.EG
D-55
ATTACHMENT TABLE D-32.continued
150 91.2
156 91.5
160 92.1
164 92.7 BOTTOM RB
165 94.75 RIGHT WATER SURFACE
166 95.2
169 96.1
171 99.2
177 102.6 GB RBHP /3
177 103.14 RBHP
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-56
ATTACH.."1ENT Table D-33 Cross sectional profile data obtained at
Trapper Creek Side Channel transect 1.
LOCATION OF CROSS SECTION:TRAPPER SIDE CHANNEL AT TRANSECT 1.
GAGE NO:91.6S2D
DATE:84 09 04
yr.mo.day
TBM ID ADF&G TRAPPER TBM RB 840822
LBHP ID ADF&G TR1 LB 840721
RBHP ID ADF&G TR1 RB 84 07 21
GAGE READING:NOT READ
WSEL:91.98
TIME:1300
TBM ELEVATION 100.00
LBHP ELEVATION 96.74
RBHP ELEVATION 99.02
-
STATION
00
·00
01
10
20
30
40
50
54
55
64
65
75
76
86
89
90
100
110
118
119
123.5
132
133
143
150
151
161
168
169
RELATIVE
ELEVATION /1
96.74
96.2
96.1
96.0
96.2
96.3
96.0
95.6
95.5
95.4
95.0
94.9
94.0
93.9
93.2
93.1
93.0
92.6
92.4
92.2
92.1
91.99
91.5
91.4
91.0
90.8
90.7
90.5
90.4
90.4
0-57
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
ATTACHMENT TABLE 0-33.continued
179
184
185
193
194
204
205
213
214
222
223
226
234
235
245
247
253
263
273
274
284
294
298
301
309
310
314
315
317
318
318
90.1
90.0
90.0
90.0
90.0
90.1
90.2
90.5
90.5
91.4
91.6
91.97
92.93
93.2
94.7
95.1
95.6
96.0
96.1
96.1
96.4
96.5
96.9
97.8
97.2
97.3
97.5
97.8
98.1
99.02
98.2
RIGHT WATER SURFACE
RBHP
GB RBHP /3
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-58
ATTACHMENT Table D-34 Cross sectional profile data obtained at
Trapper Creek Side Channel transect 2.
LOCATION OF CROSS SECTION:TRAPPER SIDE CHANNEL AT TRANSECT 2.
GAGE NO:91.6S3C
DATE:84 09 04
yr.mo.day
TBM In ADF&G TRAPPER TBM RB 840822
LBHP In ADF&G TR2 LB 840721
RBHP In ADF&G TR2 RB 8407 21
RELATIVE
STATION ELEVATION /l
00 97.21
00 96.7
01 96.6
10 96.2
20 95.7
30 95.9
39 96.3
40 96.4
50 96.5
60 96.7
70 96.8
80 96.8
90 96.6
99 96.4
100 96.3
110 96.0
120 95.5
130 95.1
131 95.1
137 94.8
138 94.7
148 94.1
158 93.6
168 93.2
178 92.8
179 92.7
189 92.4
198 92.00
208 91.6
218 91.1
GAGE READING:NOT READ
WSEL:92.00
TIME:1330
TBM ELEVATION 100.00
LBHP ELEVATION 97.21
RBHP ELEVATION 97.21
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
0-59
.........
ATTACHMENT TABLE 0-34.continued
228
238
248
258
267
268
276
277
287
293
303
312
313
322
323
333
343
344
344
90.8
90.7
90.6
90.7
90.9
91.0
91.3
91.4
91.7
91.99
92.4
93.2
93.5
94.8
94.9
95.6
96.5
97.21
96.7
RIGHT WATER SURFACE
RBHP
GB RBHP /3
/1 Etevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-60 .
ATTACHMENT Table 0-35 Cross sectional profile data obtained at
Trapper Creek Side Channel transect 3.
LOCATION OF CROSS SECTION:TRAPPER SIDE CHANNEL AT TRANSECT 3.
-
GAGE NO:91.6540
DATE:84 09 04
yr.mo.day
IBM ID ADF&G TRAPPER TBM RB 840822
LBHP 10 ADF&G TR3 LB 840721
RBHP 10 .ADF&G TR3 RB 840721
RELATIVE
STATION ELEVATION /1
00 98.21
00 97.9
01 98.0
11 98.2
18 97.6
19 97.2
26 96.5
27 96.4
37 96.1
47 95~8
52 95.8
53 95.8
63 95.7
73 95.2
83 94.6
93 94.2
103 94.1
113 93.8
123 93.5
133 93.2
134 93.2
144 92.8
154 92.5
164 92.3
171 92.18
178 92.1
GAGE READING:NOT READ
WSEL:92.18
TIME:1400
TBM ELEVATION 100.00
LBHP ELEVATION 98.21
RBHP ELEVATION 98.51
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
0-61
ATTACHMENT TABLE D-35.continued
179
189
199
209
219
231
232
238.5
248
251
252
259
260
265
274
275
285
294
295
305
308
318
328
338
343
344
354
364
374
375
377 .5
377.5
92.0
91.8
91.8
91.7
91.8
92.0
92.0
92.17
92,3
92.3
92.2
92.2
92.1
92.1
92.6
92.6
93.5
94.4
94.5
95.5
95.8
96.4
97.1
97.5
98.0
98.0
98.4
98.6
98.2
98.1
98.52
98.2
RIGHT WATER SURFACE
RBHP
GB RBHP /3 /1'----
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
D-62
-----,-_._----~---------------------.----------.----~---
ATTACHMENT Table 0-36 Cross sectional profile data obtained at
Trapper Creek Side Channel transect 4.
LOCATION OF CROSS SECTION:TRAPPER SIDE CHANNEL AT TRANSECT 4.
-
GAGE NO:91.6S1D
DATE:84 09 04
yr.mo.day
TBM ID ADF&G TRAPPER TBM RB 840822
LBHP ID ADF&G TR4 LB 840721
RBHP ID ADF&G TR4 RB 840721
RELATIVE
STATION ELEVATION /1
00 98.21
00 97.8
01 97.9
03 97.6
04 97.3
10 95.7
12 95.4
13 95.0
14 95.0
24 94.7
34 94.5
44 94.3
51 94.2
52 94.2
62 94.1
70 93.9
71 93.9
81 93.6
91 93.4
101 93.0
110.5 92.61
114 92.6
124 92.3
129 92.0
139 91.9
149 91.8
157 91.8
167 92.3
175 92.61
182 92.7
GAGE READING:NOT READ
WSEL:92.61
TIME:1430
TBM ELEVATION 100.00
LBHP ELEVATION 98.21
RBHP ELEVATION 96.64
DESCRIPTION
LBHP
GB LBHP /2
LEFT WATER SURFACE
RIGHT WATER SURFACE
0-63
ATTACHMENT TABLE D-36.continued
183 92.9
193 92.9
203 93.1
213 93.1
223 93.4
233 94.6
243 95.4
253 95.7
263 96,2
273 96,2
278 96.0
279 95.8
282 95,3
283 96.64 RBHP
283 96.4 GB RBHP /3
/1 Elevation relative to 100.00 ft.assigned to the study site TBM.
/2 Ground beside left bank headpin.
/3 Ground beside right bank headpin.
0-64
!llIll!ml
t I
iJ}~t<'j N ...-0 a~CO j ....
~0 121-C·0 1~0 r:})m V)
I
t
-
('(
~
(/)
( •...1;C'..~
··...a_j ;-.'~)
/..-...-....."..,."-•...
..---.lJJ
\(1'":,.....
~.~~~
.L.-....;.)
-::-·r~-'';-1
-'
-',,---
li
i
f
/'
/
I
/
I I I
(~I.f)V 1"1 N j::J V)......
r:})Ol 0)m 0)Q)(j)OJ
I
j
I
~0
lfJIC···JI
i
~
II
~0+
(..~.~...-.~I f-
i LJ..
''''-'''r z
~0 0....
00-<:(
I (,~w.,...
~
~~III Zi'-'.-:1""
f-....
(0 n.....·i...i..,;
I ...-
1 I:'"'1 ....
f WJ~
~
i ,,,...,:2L~__i
(-..!.::;,
I ...-n:::
I l.J..II-w
I l \
I .~.,
~.L..
l-0 .:t"
OJ r-.:
I (f)
L w
I
i
i ,.~.
I "--:-+
~
I I
L0I
OJ !"(C-t..")
OJ OJ OC}OJ
Fi gure 0-1 Cross sectional profile obtained at Island
Side Channel transect 1.
0-65
w::-L,-,'__J
z
0...o«w
!
.,r--,
l-
LL
o
OJ
o
N
0-
i
i
I 0
l~
I
I
j-
~,~I N
Ir <c.
I~
f-
I~'_i
r
I
i
I
\L..------
w
../..,~.
<I;
(I""'i ,I
...../,J
<f
.~
i
i
\
!
I
I
I
I
I
l[)V r---1
i-'(=J Ci--'..-
N.,....c-0)
()000)
r--
t
j
~
f
j
,/
I
(/
I I I I I i I I
OJ ,.....<D LD +r.f')N ~0 Ch (jJ r--~<Dm0)C?~(j)Ch G'>0)(]),,j)OJ OJ ,x)OJ
Figure 0-2 Cross sectional profile obtained at Island
Side Channel transect lAc
0-56
.....
[
.-
-
r
t
r
r
,'~"II,.
:...'"1
(...-.1
C0
c..)(,..J
r--,,:\
",~'.-........~.,
'"i
(~/-),,,"",\i
.~'!Z I
.~...-.......w I!I l f\,
'---''-'I
~<IL(.!>
~I-=.~
I I
t~
I('r't
U l
I
!,
I
II
\
~
1I
I
I
!
I
I[)
0
I I I
V 1';N ~0 C,OJ 1".....
()0 0 0 0
0).~0)
~~
I I I
V t'"1 N
Wi (j)0)
I I
~aCho.Ji'<D
Q}m OJ OJ (0 (0
!
'0I(0·r r>.J
I~I~o-.l-
c-:J .,.-.....
I-
~u..'-.-'z
I e-eL
~0 0«I N W~:r:
::.::zlo-<
(C OJ
I .,.....
t=:Ir w
-l
lo -..c.
N 0
~0r-o:::
lJ..
W
1\
I '.....
l
z
0 ~OJ (f)
0
I
~c·+
to
I[}
()J
I
L
Figure 0-3
(lj)I"'iOllV(\3l3 3/\ll~tI3d
Cross sectional profile obtained at Island
Side Channel transect 2.
0-67
o
W
..J
:2oer::
lL.
w
(,"-'
r-
I.
0..o«w
I
!
I 0
l-!):JI('-..JI
\r-
I
I 0L+I (-..JI
~
a
0
N
I c'~!.!)
I .,.....
I
L.
i
i
i .-.~'-'(-../
I ..-
I
I0r-OJ
II;
~
!
I
L .--"
\-1
I +
~~0
I[)
ro
I I
o 0,(jJ \"-<0
(/)<XJ co co co
I I I
co r.......<0 l,r)...r 1"1 N .,....
0)6'>r,j}0)0)0)0)Ch
------------------.."".(
)
j/_.
/
!
i/1
/
I
I
Jic;I I I
I.D ..q-n (--.\.,....0 u,
0 ()0 0 0 0
a,.,....,.....,....
i"r""',
I ~.'
t-L./
LL
~•
t'<1
C0
('-..\,>J
"..--,t"l
'-'-.~:c.
•......F~
.........
f (D"\i ,""-,
U ;'.~
z
,--..w
LJ -'\,-
r(./......
-=r:(:>
<f"..,
-l
t /1\.1 )
Figure 0-4 Cross sectional profile obtained at Island
Side Channel transect 3.
D-68
0...o
.:(
W
J:
:::.-::
z-<OJ
-L..
,----,".0
z
'.,_....
o
oo
N
I
~~
~j ~('•.,j
l-
I
I 9"r::
r
i
!0t~
J
1 0r·CD
L
I
!.•-.'.-.;+
I [
OJ ~-.<0 l.l'J
fJJ <0 .'£1 OJ
""')
I,.r'
I
\
\.
t/
!
(
/
/
,.....,..f
.I
1/
c--'
I I I
I (
,Xi r......CO i,n v !"')N ~0 (j)
rJ)u)(/)Ch 0)<j)a>u)Ch ro
I
c·-.,/"0 0>
I:::'0 0 0)
.,....
LD V
t::;"0.,.....,....
r
~
I
r-
I
!
(!~.,';r'-J n IJ.."'i//\313 .::;1\i 1'\7'13 d'.,-'--',.._..,-'I .._..
Figure 0-5 Cross sectional profile obtained at Island
Side Channel transect 4.
0-69
~
(\../LL...
L-
I
I
iJ.)+1'<'.,".-,C·0'-..I
I
I
I 0
f-ro
1 (...JI
I
I
f-!
II
~0+
I C-~~J "'---"l-
L LL
'.--.'
--...
f
z~0 0....
,..,0
I...J <()('".,J W...,--:>......
~:::::LI(I Z
/I .......
,~~/I '~
t-(C.w..J
i.I .,...,
"'""-----..,I C
\L w
\I ....J
"i\.
\~,.....2'.-/
(-..J t-q ,......'
(......a:.:
)1.L
W
I '\._)
I Z
0 ~
I OJ t-=
/(,f)r:-,
I -
!I 0
I I
/r-
i./,
J I}r-.
f l-'-'
/I +
//IrlI
~.III!I I I
0
('--..1 .,....r"""\u)'Xl 1---\0 i[)+1'1"}N .,....,......c)OJ r.....(0 ID'-''-"
I;:)0 0 ,~r~)0)C>(j)0)0)(j)C)(J)OJ OJ OJ OJ OJ
3/\11'9'13 d
Figure 0-6 Cross sectional profile obtained at Island
Side Channel transect 4A.
0-70
z
w,.\
'-'
«I-
(/)
o
...-...r-
w.....
"---z
......
c
o
c·
I 0r-(J:.
Ir-
ltl~~(-.J
~
~~
r~
~
i
iLa+
..•/
///
..-......, W
L..-a (!)
--;7 ·:t
.w"~-.?'.(:.."
.....1......._..J.....
---l
(II,j )
i /--'1
~j
r~,/
LL
~
.-
-
I 0
lJ)-.;j-I')C°..,J ".-0 G)co r.....<C'L1i +t""}t"-l ...-l~n··(JJ I .....<0 LD'..u
0 el-I:=';.f~,.-...0 G),~eli (j)ffi a~a,a,(j).;y,OJ O'J (0 (()'iXJ~.
..-
(1.=i)!\j 0 11''1/\313 3;\11v13 d
Figure 0-7 Cross sectional profile obtained at Island
Side Channel transect 5.
D-71
•
o
0...o
-::r:w:r:
o
o
CD
c·
Q
o
C-....i
o+
(0°-1 ~',vl-
L
a
fJJ
C···j
I;
I
I,
l-
I
i
~
I
I
~
I~
I
I
!
I-
!
I
Ir
I
I;r
Ir
I
f-
j
!
r
r~
ro !"'\.0 1.0
OJ OJ ('0 0.:'
I
L[)V »':"-.i ~0 (j)CO
0 r'I::}()I::)0 <.J)I:J)~.
~
...--""'.W
I i I r"J.-...--.j .......
.=t
(2)
C[)
'--0,,/
LL
~
r .....
l/J
("\C·o.J
...._..,....t"';
.....m ••_~~
-.....••....v ....~
.'....
I· "'II'i j-'I·'I··ri i\'1-'....._.,:j,.:!'\,.~,_,1 ..-)(f ).~.1..:::J:3/\i.L'J'l3 d
Figure 0-8 Cross sectional profile obtained at Island
Side Channel transect 6.
D-72
o,....-----------------------"-------r-O-+
-\-i-
I('('I
""--'-IL--I
j I
L ...-....
0 t-
O u....
I f·).........,...
\"..':':~'Z
D..
~0~./J"«.«w
I .,-......
....,r,..-
W (.,l.....}----I ::L-+~>I
z
L--+-={
I 1-·'<~OJ
...r-\~.~0U)J~0 t
i I I
'.._0<I NZ WLLl,--!;:i
L.Li '\I
(!)2
-:{\\0
0 a::::--=--\lJ..............
L..~W wu
f--)z
(j)0 ~a (f)
---,.......-~......."II 0
J"""!.-"\.~~,
-~-..J....'~""I---=--1.\.~~:>"I•..0:-J>I
o
8+~N .....cmoo~~~+nN-OOOO~~~
ocoooc~~~mm~m~~~rororororo
(u)!',.J 0 il'v/<:Jl3 3/\11'113 d
Figure 0-9 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 1.
0-73
w
("'-'z
~
(f)
il.o«w..........
"..-...
f-
LL.---....
Z
I
i
I
I
II ,~,
'_IrC}I ('-4
I
I
I
.~
I
I
Lao
I
i
I
I I 0
.,.....G 0)rt:.'r--~CD ID
c"t';,C,OJ (JJ OJ '::c'co
I
t.r)N
0)c)
I I
0-
o
o
,----------------------------.....(0
1+I
i
I
!
!
I
l-
I
"'F1 I
.ID ..q-1"-1 (,..J .,.....0 c,OJ I .....\0
I~Cl 0 I:.':}I~'::i ..=,:,ell (j;.c,
~.....\.-.•~.,/
....,;,....
----'7'
./
«
"-('(""~
I I V;,L.L.l +
i--+
I 1-'
r r\j
~..j'.)r-~!
I I
"--"ii ' ,L..!L.-i..J-.i
~":r W I~=:>D I
.::(I0...,.-I..........
.....,JfD~-IiIIUJ
~i
!,
r n~/)i
...o~o.··I
!
I
I_~"'·1·-·
"-oJ--.
~~-~-.;~
(-"'"I
1.-'-/
Figure D-10 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 2.
D-74
-
,...,.
('.!
t..'\~
,;-,/"i ro
-
~
....."...~(
----:7L«
(II
w....J
L-,,
"5
W
t-
el)
7
0-
j I 0
j I v
I I
II
)I1
I I
l-
I
I
II
i I ,,-'........r
I '-....1 r-
i r-.:::>w...
I
I
"'-}'o__JO"
l Z
II 0...I I
I I r,
I L-l
I «
I W
I ....
LD I
......
to ::.::::
"=:1-I
I
I Z-!
of-,6I....
j---i OJ
i 0
,--,I r 0 rI.....,
I ('-.J l..l..
Z l.lJ
I
I
...J
W
;r~I :2t...:.J--I ,,,",,
~~"---"<!)I L.U:::
I
[
l.L
W
I \
I
"--'z
0 «~
~\0 (f)
I ..--0
I 1ii
I !I
i \~i \',"",i
I II I
I I
j
I
I I I ~I I I I I 1-0jIII
1,.1')V to/)(-.J .,....0 W>CO r....<0 I[)+t"1 N .,....0-a~CO r....<D I[)
.:::>0 0 0 0 0 0>J~0)0.,0>W>0>(j)(j)(j)CO CO OJ CO CO
.,-.,-...............-
(u)1"-..)0 Li.',¥,/\313 3/\11'9''13 d
Figure 0-11 Cross sectional profile obtained at
~1ainstem West Bank Side Channel transect
2A.
0-75
f--
I
o
0
!
.-,
'-.J'
I -+i
i
I
I
I,
i-
I
I
I
i
I
!0 'i='I-0 l.L,
I t"')-.._."
-:r
I
-<--,.,w...
Cl
~~:
UJ
--r-
!~
i ZI.=:(i
!CD
i 0
t-O r
I ('"~~.......
W
i --.J
II
I :2
I r~-"".v
L 0:::
I
l.J...
W
l "
l ...'
'"7-<--
0 ~
0 (f)
I .......0I
!
i
LI
i
l.r).-<~Wi OJ i·-·CD
(3)(J)OJ fl.:'(:c'(£.
\.
\
,.....<D LD -.:t .~('..J
'""'.4
fj)':..;.,.(~)(j"j {).,{))
5!
:.0")I r'j ("...~0 W)O.'J....~
!=:.':=1 ;-,0 -21 l-i',.::,~)~,
../...
..,..r....
,,
l.J.j
LJ
I-,..-
icn
(r·\·
',.J1'1-""......
.L
l..~--.i.....J 'i.-'
Fi gurc 0-12 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 3.
0-76
0-w
-::(
W
I
:2r.....
...."
0::
ll..
W
()
Z
0 ~
0 C0
.--0
a
oo
l
I
I
ir
I
I~
I
i-
I
I
I
I
I
r~
\
ro l'(,0 lD 'OJ-n N ..--0 (l)ro r--~-<D t.D
C)(I)(j)0)(I)(j)Q)Q)Q)ro OJ 0Ci OC)CO
I
-I
i
I
i
'"I I
IJ.j ,1")(\J 0-CiV..-
0 0 0 C),.-,0 Q)'-J
..-..-..-..-
---,---
-~.....j --.
~
i
(0.V )
l--
I
t....r"""\i .)
--=:;::-
.?
i 'iW-..&
,....
I
-
-
Fi gure 0-13 Cross sectional profile obtained at
MainstemWest Bank Side Channel transect
3A.
D-77
((-'\
oo1'+
I
I
L
j
1
oo
1''')z
w
(\
'-'
Z
~
(f)
o
::..:.:
z
-=:(
OJ
Il.o
-=tw
I
I
i
I
I
I fl.
I '-'
t-O
I (,~JI
I
I
Ir
I
~0
0
!..-
I
i
(/
,I
I I
I 0II
o:J r.....\0 lD V-i....,)N ..-0 Ch W r.....(.D i.1"')
0)(3)0)0)(J;.(J)0.,,0)Ch OJ ro !]J (}J O'J
I
1.1")V 1''1 (-..J ..-C'Cfj
()Ci CJ C}0 12-rj)
..-.--
.ow::r
,,w w---=-"r,:S-.~
<2
r ,'-"t'''','"j)"....z
Fi gu re 0-14 Cross sect i ana 1 profil e obta i ned at
Mainstem West Bank Side Channel transect
3B.
0-78
1
Ul -.:l-"''1
F-a c-o
0-
j 0-
I +
I
!
i
II
L
i
II
I
I
i ..'--..,.
f c-~r 0 LL.
!"')-"'--'"-
Z
II 0...I 0-<~W
I
~I z
i .=t:
I \~"......
i o·
l-e-t=i ('..~
i LJ
I -.J
I :2~0
~
l.J...
I WI
I (\
I -'z
0 ~L 0 1.0
j "....0
I,
)
\
Ir,
I
I
I I I I ~0
-.:l-1"'1 N ..-C-O)OJ i ....<c.I[)
r~)(j)(j)0)(j}OJ CO OJ OC'OJ
--"...-.,
1
\
I
J,---J
I~I I
N ..-0 a>co I....<D i.Doc-0 (j,(j}(j)(j)(j)
~n-,/
L-
I
\.,-('
~~,.-.'
.::-..
«
+OJ (/;.
+
.,...j..
l----,
i"~·
(r\
J "I.....I J r::l,,,
I 'r Z:.-..LJ
--::;.WS:-(:)
,-",
"""<!-.
>
I IiIIU-..l
t-
Ul
---,..../..:::....-
-:--1---
~-...;!
~,
-..;:--
'C-::>
-
-
(i -1-"r-·JOi i ''1/\:3-I'..::l'3/\!l'v'13d'..,,--..:-.--...-...
Figure 0-15 Cross sectional profile obtained at
Mainstem West Bank Side Channel transect 4.
D-79
•
A',.."..;
c'
2:
!"
",-./"
0::
LL
Z
-:1'
cD
z
"0_.-
....-....r-
LL.
I ()re-
I (-.I
!r-
i
j .-~ij :.;;.;'
0
1
j,,
L
ir~
i
I
f-
------------"0._---
--,-.)
i,
\
~\-
z
(·v·-
LL "-:..w<f.
j
(3)
-=:i::---1 (~)
(~l//
I-
i
('\(/)
,,__)1"")
"'---u;-'~-....._-r;
(jj o
_._0
I
z
/
/
I
i.D ,i.....j (--oJ 0-U)W ;......<Co iDV..-
(.:i C)0 0
C)0 I:J)I,:J)f=t,v)(J)
~~
V j.'1 C~..J ~0 Ch (0 i~·CO L.r:;1
(5)I,:J)C')Cb OJ OJ ijJ CO ()J 0:J
Figure 0-16 Cross sectional profile obtained at
Circular Side Channel transect 1.
D-80
z
~
(I)
o
Q...
o
.=!
W
J:
2.--.v
U:::
l.L.
W
l '\--.
o
(•..,j
o
OJ
oo
(-..j
o+
('.~:
t.._)
f .~.....
;J
'-'--
_f-·
=...J
--j
--l
~
,'"'\l.)4 __•
I
I
II:o
J~OJ("~..J
i
~
I
~I ~
.......-...~.i.f)I -'--.....I 0
'~I --~~~~CF:i .I ---.....i ..-01 \
Z I (
i \
IwI'~I~I
<!i J
I
I
I
!~
\
1
----'-----------
1-1---rj-~-r----r----'-""-"'I-""'--;ir-'------r(-'I'""l---rl-rl---r-.,..--r---:----..,I~~_I~0
~vnN..-o~ro~~~vnN..-O~ro~~~
oooooo~~~~~~~~~~rororororo
r
r-.
!
! '
3/\11':713 d
Figure 0-17 Cross sectional profile obtained
Circular Side Channel transect 2.
at
0-81
-.....,....
---•.L....
Ir-
-"",....,tf}
-"~--~
-'1'
_.0
........
j )
··o~·'
••0 ~
1.,",-)
----....._--
\.
\.
i
l........
I
)
~.-~~----
o
'0_0'
Z
,,".x.
z.=t
CD
::2,--.v
Ci.
I..J...
W
(\....,.
I I
L'l ..q-t-)..=~0 Ci
I~I j I
('-.J ~o·ell OJ I'<0 l.f)...:-t-j (,'-.J ~0 0)(fJ 1"'--.(0.
I::J C)l~(J)m '(."J)f~!G;efi ,'j)m 0)(j)OJ OJ ro OJ
I•."')
OJ
(.;....""I'.;"-',f '.;'..i\-':~'..J....j),'..11,-,1.1.7.,>..::J ;~
Figure 0-18 Cross sectional profile obtained
Circular Side Channel transect 2A.
D-82
at
-'(
r....k··.....
W-
("'I {,.{)
i......_)"""'"j-'-..""....l[}........
~-.-.
{/~i
,_..!
1"""",....,"
-L
{\...".-"
~W.--r-.:r"'=-J _....
r-~......
0
--"--,'
,..'~i
l.J._---cr:
(~."
.•_....
P""
LD +j..'1
(~.,~0
I
I
I~
I
I
~
l
I
I
Ir-
Ir
I
~
Ir
i
I
L
l~
~
I~
I
i
I~
I
Jr
I l-
eo i'"~<c.iD
ro IJ]OJ OJ
a
CC,
C".J
c'+
N
oo
(".,j
~.
o
N
o
co
o
z
D...a«w
I
z
.=!
oj
:2ou::
LL
W
1\.....,
z
~
(f)
o
Figure 0-19 Cross sectional profile obtained at
Circular Side Channel transect 3.
D-83
-I .w...
o
c:[-
LJ
I
z
ocr.
l.L
W
()
Z
~
(0
o
o
o
OJ
~.
c·..J
(J:!
C···J
o+
(~..:'.--'.
i-
I.
~
I
iI
i
l-,
!
!
i
~,
i
i
L
I
I
!
l-
fr
i
ir
i
i
!
L
i
Ir
I
~
~
I
I
I
j
i
l-
I
I
Ir
L
I
OJ r-.....CD I,{')
OJ co if:..OJ
(
\
)
/
i
I
//
/
./
~
"i
I
/~
.".-
C-.J .,....0 c}
0 Cl c-(j';......
iD ...f't.."}
I~l=.:i 0
.-..,
...."'"m,
L-
I
,Figure 0-20 Cross sectional profile obtained at
Circular Side Channel transect 4.
D-84
-\
r-
.I
i~"/L
L-
i
;-.."._'
(-·v~···Z
l...1..--w,::::.T (T\
._j ~<
---L (5)
-.'\
-.,I
C_)
"l""-LL
(-"..~.,
i..li I r~)"V
0 '2 C
I..D
OJ
1'''.I
'."
-
o
N
z
G-
O«
W
-r-......
Figure 0-21 Cross sectiona~profile obtained at
Circular Side Channel transect 5.
D-85
.---------------------------.,-0-I ('-J
L
I
i n~c;:
.,.....
o
L
w
..J
z
Q...
o
«
W
I
w
()
z«I-
(f)
j,
r-
IOi:::
r-
I
~~
10f-('-J
I
~
-\-
rv'L.l.-
L-
I
.,.....
(.1".'
~.......,.
""'\\J...I
t,.-_/
I f:J)
....~.j--.-'"~""'""
,-"~-'.."""I !)".~'
'-_.'L
<::(w
(;)-....-A-"
"'7 '"L-<.)
-....
J
----"
""<J--r /\
\,•..J l
t"I ,...,t'I .-.I ''---1 ,.-,--.--.--.".1\,..'--",~,~.:j,.II'··i U .l.V/\..:j !.::i .:j/\L...)I !..:J d
Figure 0-22 Cross sectional profile obtained at Sauna
Side Channel transect 1.
D-86
z-<OJ
o
z
,..w-e:.<!.
W
J:
::2
"....,.....".
Ct:u..
W
U
Z
~ef)
o
o
-+
oo
oro
o-+
o
':,0.
..-
o
N
o
N
I
I
I-~
!
l-
I
I
l-
I
I-~
I
l-
I
L
1
f..
I
Il-I
r
~
l-
I
I>-
Ir-
I
I
I
I
l-
I I l-
eo r---.t.D I..G
0:',):)OJ (1)
,,,,.......!
"-\.J
r~r/
~
~
i
:.D I j-"')(...J 0 I~j OJ r-~.((i~v .,....-C.l I~l~i'1:::(~-:j)U)(J)'--i "-'.,...
-
-
-(..L.:J "j NO 11'\1/\-=1i-=f 3/\!1'~'l3 d";.,",',.._.-
Figure 0-23 Cross sectional profile obtained at Sauna
Si de Channel transect 2.
D-87
("v/
W-
L-
I
...\~
,.p'~.......'J·..l
i...__j en
....:----..~-...........",...
,.'..-....1'"~......
t_./.)'0_"z
~-=:---,---(r:,
.....1--.~--;;r .~L (..;..)
-."\
--'-","""<...j
-~
('/-',
V'I
1-"':.0 i[)-+l')C-...l ..-a o~(jJa>t.j)0>a~0)(j)(j;.())ro co
I
i
l-
I
!
I
I
i
I
i-
I!
L
tr
I
I
l-
I
I
~
I
I
l-
I
I
I
I
I
ir-
L
I~
i
I
l-
I
I
II,
f
L
I
!
j-
I
I
L
~
~
i-..(C,l,[}
OJ (jJ OJ
,~,
'-.J
.-~-'-.J
c-
1'.,....,........
o+
o
N
o
o
(0
C)
-.+
o
N
o
z
\."..'
~
o
Figure 0-24 Cross sectional profile-obtained at Sauna
Side Channel transect 3.
0-88
z
D....o
<[-
W
I
o
(JJ
a
(.0
.....
e-.---------------------------.,-0IN
I
I-
1 0~;:o
I
It-
Ie-~,~
10:-
1r-
jo,+
~oL('~
Ir 0
t-1:':;.
10:-
L
~o1+
~
;---.
w<]_.-(!.>
;;-::(
L:-()
-..,
I
-'
-~<:1.....
i ..-.,U}
....1.....
"'-\/...,'
!".
l.._.l ;j':,
.......J
("V"----
~
L.
I
--.-.
........~
.....
o
c.n +i<'j000 c.n
(Q
Figure D-25 Cross sectional profile obtained at Sauna
Side Channel transect 4.
D-89
-<OJ
z
l.-I.w..
z
..............
I 0+i
I
I
j,
1L
j
I
II
I 0. I
I"0
!!''1
r 0i
I-0
i N,
I
I
I~
II
I 0L0I..,-
I
I
II
~
I
l 0
..-0
0)Ch
I
G'J OJ j.....<D U'1 -.::i-r·'1 Nu)(J)(J)Cfj 0'1 Oi 0)C)
i
'~..........
\
\
\
\
\
I
I
\
\\
)
.~\..
h
N .....C}
C)0 0
..--.,......,.....
i
i .....':.0 i,f}I 1''1"Q"'
,;:}0 0 ,;::1 0-.....
o t:h OJ.....()()
7
Figure 0-26 Cross sectional profi1e obtained at Sunset
Side Channel transect O.
D-90
-,
-I
.-,'
0rO.'¢
I
Ir-
I
I~",-,
0 f-
......,0 I .
l.1--',----t"}'--.--.':
......./''',i Z
I ~-'\
I
,CL""'""-\~\W,
\\«I Wr"T'"'..-,-'-
lj1 \
C_)0;.\I ~z
................
,.£}I -=:(()J m......\~",(I','-'
i I 0 \,0 L___'J
Z \N W
i-----\\I ....J
W I;:2I!I (!)\I 0--...........=:(\L(t"i:!$u:, I),I.J....~,/
1~\w./.::..-")I
(J-..,
..--J z
("j 0 «
~j J \L l-
I 0 (f)
I ..-I 0
\I
l
...;r I
.'..-i
/!
//r,
f
---/
o
Owro~~~~~N-Owro~w~~~N-O
oooOOOOOOOffi~ffiw~~w~~~
.....
Figul'e Q-27 Cross sectional profi7e obtained at Sunset
Side Channel transect 1.
D-91
.............,
I e
!
-+
I~
I1
I
I .,.-',(""c ,
i r-
C"1 r 0 LL
-"..!")'.....,.'
(\,/Z
I .D............-
!--0
!~~W
~..)!
lji ---------I
~(",cJ"I '\i..~j Z
""-.(,JJ.\.~'
........"'9.....CO \,I
.....
r~'*'I,........'.'.0;':I~\.'f .I 0 l-e t10_)
Z \i N\~W
I ....J
i--"<.L \i ,:2Wr..;..}\'-"'i<['...."
...'-,<..5 ~U;I l.L
7 f
I
w"'--/0-."
j Z~>
f ,n /~!~0
\-.';0 (f)
I .....-0
/I,..I
/!/',I
J
\
0
0 UI (IJ r.....rf~if)V t.:')N ':::J Ci VJ 1---(,0 LD ,t-')N 0...-T'""""'T ..-
~C C C·0 0 ,~0 0 0 C}Ci 0)C,(J,~,(J,(j)0',0:,l~,
.....-.-.-
(J...:j)I',·j 0 il''1/\-313 3/\i1 \7'13 d ".
Figure 0-28 Cross sect'ional profile obtained at Sunset
Side Channel transect 2.
0-92
-
-
-
r·r1
-'r-v'"L..-
t-
:---
!W
!fW~(.n C:5
~.))
l'~~.
I i I·L.i l
1.....----------.,--.....
'.\
../
.../
./....
f
I
II
j
I
,I
\
\
\
j
I I I
r;:;;;
0 0)!JJ r--..to l.D V J'I')(,.J -.-0 0)ro r---CO I.D -.;f-n N -.-
..,....(J 0 0 .::>0 a 0 C}c-o 0>.0)0)01-0)0)0),;:j)a~..,......-..,....0:-
(I .J '"1 ',\·J-n i ['\li'\'I:::i -=i ./\.',_I 't<.'~l'-::J....J >-J.....J..-J .~.._ ....L......:J .--l._:.-I
Figure 0-29 Cross sectional profile obtained at Sunset
Side Channel transect 3.
D-93
c-
O+
Ir
f C-
O
l'<")
I
I
IL
1
I
l C-
O
I N
I
I
j
I~
c-
O
0:-
j
\
i
ir
I
t 0I
0
0-,
."'-'~.
z
CL
Q
<t:w
I
z
~
(f)
o
f'"'\........"
D:::
LL
W
U
Z
~
(J)
o
<:w
I
z
....-...
l-
LL
o
oo
T~
o·
-+i
!
I
i
i
l
I
I
I
-IIr
I
L
!
I
J
i
I
!--
I
I
II
i
I
~
I
~
I
I
I
i
I
I
~
I
i ~
!"")N .--0
d)(j)U-;.U')
--~7
.-'~r
/
r
I
I
i
/
/
\
..-J-----y:;::;I
'-.Q')iJ.i V i"1 (,~.,.-0 (h ro i~~CO LD +
Cl C}0 C}a 0 0 0 0)0),,j>,~,(j)(])
.,.-.,.-.,-
o C)(JJ
DO
f .i~-'
'-./)
'._'"
f i~'\
t.))
z
,
!--jJ
\!;,~
.:::r'
(j
«J
(l/
'---
~
/I I "'j 'n'"".;I ,~-,--r ....",I '-',"",l,J..:l/I""j,..."ll.",i\.:i !.=i ..:i/\I..:..V l.::ld
Figure 0-30 Cross sectional profile obtained at Sunset
Side Channel transect 4.
D-94
0
I 0-+III
I
/
L
I.-.I 0i
},t-",,\r 0
i..j.)1'<1....,,.-Ifr~
LL-
L-I
~---.------.....-----.......
~.~
'.......')
)
/
/
/
z
"':(
OJ
z
Q..o
-::(
w..,.........
2:o
0:::
1L..
Wo
Z
-::(
l--
(f)
o
.'""--~.
.--.
oo
o
c·o
N
r
I
l-
I
iI
I~
I.
II
I
I,
I
I
j
Jr
I~
N .-0-
~c>(J)
/
)
l~I I
t.fj N .--.0 (j~OJ !'""\IJJ V 1'1~.
0 0 0 0 0-,~~c~(j,0)0)..,......,....
I i
."""Ch tJJ f-..."(0 lD V'....I.....()0 0 0
.;:)0..,...........-.......,....
t--I.,
I ,w..:!.:~>i I j..............-::((ji t'..!)
)
7
""--
---."
-.J
((OJ
l.."l
l 1-\
I,.)j ()
Z
~'J
(.'~I
('~-..C)·
Figure 0-31 Cross sectional profile obtained at Sunset
Side Channel transect 5.
D-95
o
o
I
i
i
I
L
w
(\-'
Z
~
(f)
0...o-<W
I
'._~z
--,l-
LL
o
I
1
j
I
Irg
f
I
I
I
I
L,!!g('--..I
I
I
~
I
~g
.,,--
]
!
j
I
~
0
0 (1)OJ r......{,O l[)..,;-t.f'}c-·~.,,--0 Ch VJ I .....<.0 I.,i")..,;-l")N ...-0
l:=t C}0 1~0 0
(}0 0 ,;:}0';,m (i>(i>(i>(5)0;,Q')(i>(5)
.,-.,-.,....
p~"/ir'-'--
!~,
(-0
if)
(")(}')
'..-"......\1;.
"'.~I):]"~·-....o
Figure 0-32 Cross sectional profile obtained at Sunset
Side Channel transect 6.
0-96
-
fk''-
~;
tw
....J
W
1\'-'
Z
~
(.1)
o
0....o
~w
-~-
I-u..----Z
oo
0
I C
I +
I
i
Irr
II
---Zl ,0
t-O
I t<)
\
\I
I
\i
\.I
\'-I-
/
/
(
\
I
)
I iI
(\J ....-·21 ,~,(0 j-.....<0 lJ."')+i'l'"j N -0 Ch O'J I .....<0
t~·C)0 0}<J)<J)<J)<J)0)0)(J)0)(J)OJ CO CO OJ
\
I
l.Q V 1"1
0 0 0
....-....-....-
(/)(--.J
(/)
',""'".....L
<-1.....
~"....
/--'1._-/-_ r
Ll-
t-
I ,I
w.....J
!,!C,)
L..U z
f....'\,
'-./-.....,
...........
Ii"'"
I
(.i..j)NO 11"1/\313 3/\Lt~;r'13tJ
Figure 0-33 Cross sectional profile obtained at Trapper
Creek Side Channel transect 1.
D-97
o
z
~
(f)
2:oer::
I.J...
w
(\
'-'
z
C-
O
~
W
I
"••_J"
!I
OJ 1"-.co I[)
OJ ro co OJ
-",.........,
"
",.
.....--"-...
~\
\.
)
l
//
/
I"
(
\
i
\~,
)
I I I I
/1
I I I II
('-,J ..-0 C'J co 1".....<0 U'}-+t<"'}N .,...C w)
C)C 0 W>OJ (5)(j)a:.a)Cl>(j)Ch (i')OJ
.,.-.,-
r----------------------------T""!C
,T.t-
I
I
!
II 0rOIn
I
r,.'......r C
I
I
i
I
I
~
I
19
!
1
I
i
i,[)-+V)
000
(\
LL
",-'("
--p;-~
(-·L.·p.F~
Li-
t-
("',,1
'....",-./
('(,'uJn
,...')
t...-'
'~..........,-
(/1 ~,'J'J'
(fi
(0,.-y'"......
~;{5)
I ~\
:......J.-..l
I I ·(-~·I
Ll..J '-"zu:::
"...•LL
i..,.:.,--.,"
-'4:'el')
(u)1\l 0 1.1'1/\313 3/\!1''713 t!
Figure 0-34 Cross sectional profile obtained at Trapper
Creek Side Channel transect 2.
D-98
f"""
I
c·
i-,.u...
l.JJ
...J
a-u
<{w:r:
oo
oon
o
I~
"'?(I
,
"
\.\'...\',-"".",~,-'"\
,)
/
//'
I·
j
~
I !
o 0>o C/J
...----------------------------r-j 0
1"':-
l
i
I
t~
l
I I
l[)V r·")N -
00000
f
~
i
l"'l---')
'"
(\/
LL
(v···
L..I-
Wn
r\
!..J.....
-=~'1.........!-.
!,-
i
I
I
I
()I
.,...,....jl
.....(n .v+;
/(/)I
<-0 !
I~c>I
W I
!10'Wz
-
(u)t-J 0 1l""t/\313 .3/\l.fv'l3d
Figure 0-35 Cross sectional profile obtained at Trapper
Creek Side Channel transect 3.
0-99
(....\",.J'
LL
o
r~
I
I
I
l-
I
Ir-.,.-',o f-a Li...1'<1 '..-/
Z
~r-
(f)
o
o
CL:.
l..L.
W
U
a
I
L
ILg
IN
I
i
I
I
~
I 01-'0
I~
I
~
I I I I i
V t.f)N ~0 0;(jJ !'<C.I,()
Q)(}')(j)0)(t.,OJ OJ CO OJ ((j
\
'~
\
/
I
I
C/
(-,\../
LL
I
t---
j
I I ()
;i I
L.......I.-I Z
"'-·v·L
W
CL
CL
Figure 0-36 Cross sectional profile obtained at Trapper
Creek Side Channel transect 4.
D-100
-
AT T ACH MEN T E
r
r
:!:----------------------------..,ISLAtlC SIDE:[)flNNE:L TR 1 (Q SITE)
RM 63.2
GPGE:063.2S 1
..-
P-
ltl
~
~
""'".-....,
J
~
-
~NOT CONTROLLED
17.800 <Q <35,000 cfs
NO EQUATION DEVELOPEO
IQ:l
M"tN5T~M DrSCM~Rj 51J'~H[t-l:(lOOO~)ICIClD
Attachment Figure £-1 WSEL versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 1 (Q Site).
E-1
:!r~~~~~~~~--------------------ISLAf(]SrCE Q-ftNNQ..TR lA
RI'1 63.2
SFGE:063.257
CONTROLLED!/35,000 ~0 ~66,700 cfs~WSEL "10-4.3011 Ql.0416 +89
r.2 "0.99
~NOT CONTROLLED
17 ,flOO ?0 So 35,000 cfs
WSEL"10-1.7670 0°·4824 +89
r 2 "0.99
:oa
MfUN5TEM O[~HRR'Z lIT 5l.NSHlfIt:(I000t:n)
IIXD
Attachment Figure E-2 ~ISEL versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 1A (0 Site).
E-2
r
-
•
5!!1"'""---------------------------.ISLANJ SIC£~NNEl.TR 2
Rt1 63.2
GFm:063.252
CONTROLLED
V35.000:S:Q ~66,700 cfs
WSEL =10-4.3432 01.0499 +89
/,.0.99
_-----NOT CONTROLLED
17,ROO 5.Q ~35,noo cIs
WSEL ,.10-1•9108 QO.5134 +89
I
/=0.99
Attachment Figure E-3 WSEL versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 2 (Q Site).
E-3
!:!r':~~"":":'::"~~~~~-----------------'"ISL.At(]SLOE CHANNEl.!R :3
RM 63.2
SFUE 06'3.2S 3
-t-
Or...
+
CONTROllED
35,000 S 'l S 66,700 cfs
WSEL ~10-4.4007 Ql.0631 +89
/~0.99
~NOT CONTROLLED
<:<:17,ROO _Q _35,000 cfs
NO EohATrON DEVELOPED
Attachment Fi gure E-4 WSEL versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 3 (0 Site).
E-4
F'"
I
I
....
....
....
....
I9...ANJ 5 HE ()flNNEL fR 'I
RM 63.2
GroE 053.25'"
COHTROLLEO ,U 35,000 $Q ~66,700 cfs
.WSEl"10-4.5279 Ql.0911 +89
r 2 =0.99
.'-HOT CONTROLLED
17 ,800 ~Q ~35,000 cfs
NO E0UATIOH DEVELOPED
IOQI
Attachment Figure E-5 WSEL versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 4 (Q Site).
E-5
!:!~T"""---------------------------ISlANO S [I:E D-fiNf'lEl.tR iA
RM 63.2
EmE 06:3,2SB
CONTROLLEDU35'OOO 5.Q 5.66,700 cfs
WSEL =10-4.3758 01.0595 ~89
r 2 =0.99
~HOT CONTROLLED
<:<:17 ,800 _Q _35,000 cfs
NO EQUATION DEVELOPED
.00
MRtN5T£:M OISCHf'lftGE:!'IT :5UN5ttI"f:(lOaoers)
10m
Attachment Figure E-6 WSEl versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 4A (0 Site).
E-6
2,...--------------------------_Is..fV(J SUE O'flNNo..TR S
Rf'I 63.2
GA3E 061.2SS
-....
~w.
en
~CD
!.
....l
~....,
.....
ia
CONTROLLED
[/35,000 ~Q ~66,700 cfs
WSEL =10 -4.5414 Ql.0948 +89
r 2 =0.99
~NOT·CONTROLLED
<<17 ,800 -Q -35,000 cfs
WSEL =10°·0199 0°·0913 +89
r 2 =0.96
Attachment Figure E-7 WSEL versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 5 (0 Site).
E-7
2r-......~~~-----~----------------..,ISLAf()SUE ~NNEl..fR 6 (Q SrTE).
RI'1 63.2
~E 063.256
"NOT CONTROLLED
17 ,800 ~Q ~35,000 cfs
WSEL"10-0.079100,1142 +89
1'2 ..0.99
CONTROLLED
35,000 ~Q ~66,700.cfs
WSEL •10-4.4954 Ql.0873 +89
1'2 "0.98
'ia lao
"'H~!tM OISCHl'lftGf;IlT Sl.fIOHIlIf:(1000175)
IlllXl
Attachment Figure E-8 WSEL versus mainstem discharge (USGS 15292780)at
Island Side Channel transect 6 (0 Site).
E-8
CONTROLLEDJ32,OOO S 0 So 79,700 cfs
•WSEL •10-1•0817 QO.3929 +90
r 2 •0.98
CONTROLLED
22,3ooS.0 S.32,000 cfs
WSEL •]0-2.1290 0°·6257 +90
r 2 '"0.98
~CONTROLLED
19,600 S Q ~22,300 cfs
NO EQUATION DEVELOPED
\IKIT CONTROLLED .
14,700 oS Q S.19,600 cfs
NO EQUATION DEVELOPED
2!T""':==~:-:--:-~~~~~~------------"'"/'AI HSTEN W.E!.S.CHFW.TR 1 (Q S ITEl
RM 7'1.4
SF3E 07 4.'IS 1
f"'"
i
I
I
-
io IClCXl
Attachment Fig~re E-9 WSEL versus mainstem di scharge (USGS 15292780)at
Mainstem West Bank Side Channel transect 1.
-E-9
!::.,...~~~.......~~---~------------------I"iAINSrErI WEST BANK sroc C~.TR 2
Rr1 74.4
HC 074.452
•
CONTROLLED
32,000 $Q $.66,700 cfs
WSEL ~10-0.9484 0°·3653 +90
r 2 =0.99
~----CONTROLLED
22,300 S.Q ~32,000 cfs
WSEl ~10-2.5547 QO.7211 •90
,,2 =0.97
lOW
Attachment Fi gure E-lOWSEL versus rna i nstem discharge.(USGS 15292780)at
Mainstem West Bank Side Channel transect 2.
E-IO
r
.....
10
I'f'lINSTEJ'l "£sr BANK SUE ~.TR 2Ft
RI'1 7'\."
SffiE 071.'\5S
NO EQUATION DEVELOPED
1111
II
lOG
"I'H~ltt1 DISCt1fn~Gt rrr 5lMH[tt:ClOOO~J 1011I
Attachment Figure E-llWSEL versus mainstem discharge (USGS 15292780)at
Mainstem West Bank Side Channel transect 2A.
E-ll
2:r-~~~.............__~~-""-----------------.I't=lINSTEM ~ST BANk SIC£:CHAN.T'R J
RM 71:.1
~E 071.1:S3
CONTROLLED~32.000 ~Q ~66.100 of,
WSEl B 10-1.1693 0°·4160 +90
r Z ..0.99
~~~-------CONTROLLED
22 ,300 ~Q S 32,000 cfs
WSEl ~10-2.6141 QO.7368 ~90
r Z ~0.92
Attachment Figure E-12 WSEL versus rna instem di scharge (USGS 15292780)at
Mainstem West Bank Side Channel transect 3.
E-12
5!~r:=::::;:~:::::~~==-:~~~~-----------"'"/'ftINSTEf'I \o£sr BANK SIrE Ctf=W.TR 3R
Rf1 7'\.1
SFGE:071.'\56
~NOT CONTROLLED
14,700 S Q ~19,600 cfs
WSEL ..10-1.4511 QO.4642 +90
,.2 ..0.98
CONTROllED
<19,600 - Q ~32,000 cfs
WSEL ..10-2.8455 QO.7934 +90
,.2 ..0.95
-
ia
Attachment Figure E-13 vlSEL versus mainstem discharge (USGS 15292780)at
Mainstem West Bank Side Channel transect 3A.
E-13
2r-I'fI......JN....STE~M~loE~s"""'r-e~AH~K·~S ..[..rE~Ctffl--.-TR-38--------------...
RI'1 7~.4
Grot:071.451
NO EQUATION DEVELOPED
10lXl
Attachment Figure E-14 WSEL versus mainstem discharge (USGS 15292780)at
Mainstem West Bank Side Channel transect 3B.
E-14
g!..-----------------------------
CONTROLLED
32.000 ~Q ~66.700 cfs
WSEL •10-0.4285 QO.2764 +90
r 2 •0.97
a
~CONTROL LEO
24.000 .s Q ~32,000 cfs
WSEL •10-0.7964 QO.3568 +90
r 2 ..0.81
IflINSTEM PES!BRNK SHE CHAN.TR 1
RI't 74.1
;AGE:07.-4.151
0
-....,..
!oJWr...
Sl
~
~
~
10lXl
Attachment Figure E-15 WSEL versus mainstem discharge (USGS 15292780)at
Mainstem West Bank Side Channe1 transect 4.
E-15
CIRCULAR sloe CHAN.TR 1 IQ SITE}
Rl1 7'5.3
l;f'l;(075.3S 1
,~---HOT CONTROLLED
Q ~36.000 cfs
"0 EQUATION DEVELOPED
CONTROlLED
< <036,000 -0 -79.700 cfs
WSEl •10.2.8775 0.7589 +85
r 2 0.98
10 100
MI'HN5Il:M IHSCHRRGt:lIT S\.N5t1["l;ClOOOCf"5!
10lXl
Attachment Fi gure E-16 WSEL versus mainstem discharge (USGS 15292780)at
Circular Side Channel transect 1 (0 Site).
E-16
2~~~~~~~~..........~------------------_CIRCULAR SlOt CHANNEL TR 2
RM 75.3
~E 075.352
..
-
CONTROLLED
36,000 ~Q ~66,700 cfs
WSEL •10-2.8910 0°·7621 •85
r 2 "0.99
-ltD-------------~lOC~-------------IIOCXl
:'I"[NS1CM O[~Hf'l~"'1 ~lt:5!1rllf.:([OOOen]
-1
.....,
Attachment Figure E-17 WSEL versus mainstem discharge (USGS 15292780)at
Circular Side Channel transect 2.
E-17
~r-----------------------------CIRCLUIR SlOE CHF;:-H:L TFl 2A
RJ1 7S.J
GftJE:075.356
NOT Cm:T!lOLLEO
14,700 S Q ~36.000 cfs
WSEl "1~-O.5670 QO.2528 +85
,.'l ..0.99
CONTROLLED
36.000 $.0 s:66,700 cfs
WSEL "10-2.5572 0°·6921 +85
r Z "0.99
IllCIl
Attachment Figure E-18 WSEL versus mainstem discharge (USGS 15292780)at
Circular Side Channel transect 2A.
E-18
-
o
CIRCULAR SIDE C~ANNEL TR 3
RN ?S.J
GFCE:075.3SJ
C/CONTROLLED
..< <36.000 - Q -66.700 cfs
.WSEL &10-1.2837 Q.4305 +85
r 2 =0.95~NOT COO.OlLED
< <24,000 - 0 -36,000 cfs
WSEL K 10.3224 Q.0745 +85
r 2 =0.70
100
MRINS1CM O[5CMR~RT 5UNSHr~(IOOOorsl
10lD
Attachment Figure E-19 WSEL versus ma i nstem di scharge (USGS 15292780)at
Circular Side Channel transect 3.
.E-19
9:-r----------------------------...CIRCULAR SIDE C~ANNEL TR 1 lQ SITEJ
P.M 75.3
GI'ii£07S.351
..
/~~~------CONTROllEG
36,0011 ~C ~79,700 cfs
WSEL "10-1.3619 QO.4551 +85
/=0.98~~'OT CO.TROllED
17 ,700 :s Q ~36,000 cfs
WSfL =100.2103 QO.10~5 +85
r?"0.91
Itm
Attachment Figure E-20 WSEL versus mainstem discharge (USGS 1~292780)at
Circular Side Channel transect 4 (0 Site).
E-20
-
-
~-----------------------------.,CIRCll.,P.R SIDE CHRNN£L TR 5
Rf1 75.J
GFGE:075.355
NOT CONTROLLED
14,700 ~ei~17,700 cfs
WSEL ~10-2.0432 0°·6359 +85
r Z ~0.99
CONTROLLEDU36,000 ~Q S;55,200 cfs
NO EQUATION DEVELOPED
---NOT CONTROLLED
17 .700 ~0 ~36,000 cfs
WSEL ~10°·2401 0°·0987 +85
r 2 ~0.86
100
M~[~"T!:M OrXHRRGt fIT Sl1'4SHr~C1000tnJ
Attachment Fi gure E-21 WSEL versus mainstem discharge (USGS 15292780)at
Circular Side Channe1 transect 5.
E-21
:!~~......--~.....----------------------CIRCULAR SlOE CH"~~L HERO
RM 75.J
8FGE O7S.:Y-I3
CONTROLLED
36,000:S.Q ~70,100 cfs
~WSEL ~10-8.0227 Q1.7531i ~90
1"2 0.99
10lXl
Attachment Figure E-22 WSEL versus mainstem discharge (USGS 15292780)at
Circular Side Channel head.,
E-22
SAUNA SIDE CHANNEL TR I
RN 79.8
GFCE:079.851
!:!~----------------------------...,
+
CONTROLLED
38,000 ~Q ~56,700 cfs
W~EL =10-4.6960 Q~.1483 +85
/=0.99
~NOT CONTROLLED
15.000 S 0 ~38.000 cfs
NO EQUATION DEVELOPE~
leo
MI'HN5Tf:M 0 [SCHRftGC /'IT 5tMI1II'f:(lOOOen)
ICllXl
Attachment Figure E-23 WSEL versus mainstem"discharge (USGS 15292780)at
Sauna Side Channel transect 1.
E-23
''-""-..;..,..-------------------~--------_._-
-,....
ww
'-
+
2 ......---------------------------,
I,,'---CONTROLLED
< <.
38.000 -Q -67,100 cfs
WSEL •10-3•1806 Q.9554 +85
r 2 0.93
HOT CONTROlLED
15.000 <Q ~38,000 cfs
NO EQUATION DEVELOPED
10 100
MINSID'i DrSCHfl~flT SLN5H[f'C r lODDCf"'.i1
Attachment Figure E-24 WSEL versus mainstem discharge (USGS 15292789)at
Sauna Side Channel transect 2 (Q Site).
E-24
--
-
SAUNA SlOE CHANNEL IR J
RI'1 79.B
GFGE:079.853
NO EQUATION DEVELOPED
D
I~O
l'InlNSICM Ot 5CHA~l'IT 5I..MH{f'l:fJOoocnJ
10CIl
Attachment Figure E-25 WSEL versus mainstem discharge (USGS 15292780)at
Sauna Side Channel transect 3.
E-25
~!~SFlJ;;NR;;-;;S~H:;;:-:E~C:Ifll:;;::~r;:;L--:;!;R"'.:4:------------------......-
Rl'1 79.8
~E 079.651
CONTROLLEDV38.000 S Q ~56.7(10 cfs
WSEL :10-3.5984 QO.9172 +85
r 2 "D.98
io
~MOT COMTROll"
15.000 S Q ~38.000 cfs
NO EQUATION DEVELOPED
I~
"fHN51t:11 OI5CHflrQ:FIT StJlr.iN [Iof.:C1 oooen I
IO!XI
Attachment Figure E-26 WSEL versus mainstem di scharge (USGS 15292780)at
Sauna Side Channel transect 4.
E-26
.....
I
2T""::~="":"':'::-~~~~~-----------------'"~5E:T SICE CHANNEl...rR 0
Rr1 86.9
GFGE 095.950
Q
CONTROLLED
32,000 :s.Q ~66,700 cfs
wSEL =10-4.148201.0297 +90
r 2 "0.74
a
itt---------.,.---...,.~ICD~----------""I""i-...IOCD
"''HN5TCI1 DISCHI'IMZ I'IT ~~Ii[!'£rtOOO~1
-
Attachment Fi gure E-27 WSEL versus mainstem discharge (USGS 15292780)at
Sunset Side Channel transect O.
E-27
_______........_......"__.......;..-11'~~_~1"_.._
2r:':~~:"::':::':::--::-~::=:'--,e-------SlJoISET SlOC ~NN£l..tR 1 ((15I1£:1
RM 86.9
GffiE 086.9S 1
NOT CDNTROll ED
17,400 S (]$.32.000 cfs
WSEL ~10°·4493 0°·0155 +90
1"'2 g 0.57
'*-__--CONHOllED
32,000 5 Q $.104,000 cfs
WSEL =10-3.7766 0°·9533 +90
1'"2 g 0.99
-Lto-------------""':t~!lO~------------,.J
MflJIN5Yl:11 Qt 5CHflRGf:fiT 5l.N5H [I'l;(I aaotr.5)ItlUl
Attachment Fi gure E-28 WSEL versus mainstem discharge (USGS 15292780)at
Sunset Side Channel transect 1 (Q Site).
E-28
-
-
:.,.....------------------------.USET SIOE Ct:fINN£L TR 2
RM 86.9
SAGE:086.952
CONTROLLED
32.000 ~Q ~57.800 cfs
WSEL •100.3170 0°.0933 +90
r Z ~0.02
~---------NOT CONTROLLED
17.400 ~Q ~32.000 cfs
WSEL ..10°·5732 0°·0017 +90
r 2 ..0.02
to ICQ
MAINS!!:M CI5CHfI~m'SOOHIItt:(1000en!
lOCI)
I~
Attachment Figure E-29 WSEL versus mainstem discharge (USGS 15292780)at
Sunset Side Channel transect 2.
E-29
21""""---------------------------...SUlscr S [[E CHRNNO-IR 3
RM 86.9
eRGE 086.9SJ
I CONTROLLED
32.000 5.Q ~66.700 cfs
WSEL :10-2.6801 QO.7278 +90
1"2 :0.96
:III g
-------NOT CONTROLLED
16.500 ~Q S 32,000 cfs
WSEL :100.2278 0°·0814 +90
/:0.61
100
n"INSTEM DI5CH~RGf RT 5~HINE rIODO~l
lOll:
-Attachment Fi gure E-30 WSEL versus mainstem discharge (USGS 15292780)at
Sunset Side Channel transect 3.
E-30
'r~~~~------__c --_----~~-7---.----~--------~~--~-----------------------.- - --------~---__-----------------
!:------------------------------SU'IScr SIOC D"flNflEL TR 4
P.M 86.9
GfGE:086.95'"
CONTROLLED
<32,000 -Q ~66,700 cfs
WSEl =10-2.5875 QD.7092 +90
r 2 =0.97
r-
I
+
-r gOg C_,__
NOT CONTROLLED
17,800 ~0 ~32.000 cfs
WSEL =100.094200.1221 +90
r 2 =0.69
100
MI'l [~TCM OrSCHflfl'Gf;fiT 5l.MHI~(Ioooen I
IlXJl
Attachment Fi gure E-31 l'ISEL versus mainstem discharge (~SGS 15292780)at
Sunset Side Channel transect 4.
E-31
S!T""":~=-=~~~~~"""'~-------------------S~SET SIDE CHflNNQ..TR 5
RM 86.9
~E 086.955
./~__---CONTROLLED
32.000 ~0 5.66,700 cfs
WSEl =10-1.2739 0°·4427 +90
r 2 =0.96••0 n c;~HOT COHTROlLED
16.500·~0 So 32.000 cfs
WSEL =10°·6534 0°·0056 ~90
r 2 =0.25
1000
Attachment Figure E-32 \~SEL versus mainstem discharge (USGS 15292780)at
Sunset Side Channel transect 5.
E-32
SlMSE:T 5 IDE ~NNQ.!R 6
1'1.,86.9
GAGE:oa6~956
CONTROLLED
32,000 5 Q ~66,700 cfs
WSEL :10 -1.1890 QO.4242 +90
r2 =0.97
A
..C NOT CONTROLLED
16,500 5 Q ~32,000 cfs
WSEL :10°.54560°.0308 +90
r 2 :0.61
-
\0 100
I1'HNSTCM OI5(:HflRGE RT SLN'3Hltf:(I OC017S 1
Attachment Fi gure E-33 WSEL versus mainstem discharge (USGS 15292780)at
Sunset Side Channel transect 6,
E-33
'TRAPPER ~E:K SIC TR
ilM 91.5
(H;E 091.652
2.__----------------------------,
+--CONTROLLED
44,000 .5 Q ~66,700 cfs
WSEL ..10-500573 01.1653 +90
..2 ..0.95
~T CONTROLLED
15,700 ~Q ~44.000 cfs
WSEL ..10°·0117 0°.0645 +90
..2 ..0.90
lOW
Attachment Figure E-34 WSEL versus mainstem discharge (USGS 15292780)at
Trapper Creek Side Channel transect 1.
E-34
TRAPPER CREEl(SIC TR 2
RM 91.6
GF\GE:09 t.653
o
~COHTROLLED
44.000 ~Q 50 66.700 cfs
WSEl"10-6.6532 Q1.4946 +90
r Z •0.96
-HOT CONTROLLED
15.700 ~Q-~44,000 cfs
WSEL =10°·0819 QO.0474 +90
/0.93
100
M"rNST~M D[SC~RRGt "T SUNSHINe (loaOer5)10CXl
Attachment Figure E-35 WSEL versus mainstem discharge (USGS 15292780)at
Trapper Creek Side Channel transect 2.
E-35
~l'"":==:-:=~~-::~------------------""TRAPPE:R CREEK SIt:TR 3
RN 91.6
GAGE OSI.6S1
CI'"e -
r CONTROLLED
~< <44.000 -Q -66,100 cfs
WSEL z 10-6•8814 01.5521 +90
r 2 ..0.98
~NOT CONTROLLED
15.000 :s.Q So 44.000 cfs
WSEL z 100.3023 0°·0012 +90
r 2 ..0.05
-I~O-------------"'!'!OO------------........IICXII
""IN51'EM OISCHRRGt fIT ~~Hr~(lOOO~)
Attachment Figure E-36 WSEL versus mainstem discharge (USGS 15292780)at
Trapper Creek Side Channel transect 3.
E-36
--------------------
Slr~~~~~"""":,,,~-~-~~------------__....TRfIPPER CREE/C sic TR "t fa SITE)
RM 91.6
r;FV;£091.65 1
.....
+
•
44.000.$Q oS:93.300 cfs
WSEL =10-4.9455 Ql.1565 +90
r Z =0.95
~NOT CONTROLLED
15,000 ~Q ~44.000 cfs
WSEL =100.0801 QO.0756 +90
r Z •0.83·
loa
MfH~lCl'l Ot5CH"~"'~UNSHIlC (IOOOen!
Attachment Figure E-37 WSEL versus mainstem discharge (USGS 15292780)at
Trapper Creek Side Channel transect 4 (Q Site).
E-37
--------------~----------------------------_......._------