HomeMy WebLinkAboutBradley River Water Quality Report 1990I
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BRA
135
1990
Alaska Energy Authority
LIBRARY COPY
Alaska Energy Authority
Bradley River
Water Quality Report
1990
BRADLEY LAKE
HYDROELECTRIC PROJECT
Federal Energy Regulatory Commission
Project No . P-82 21-000
TJ9710
ALASKA ENERGY AUTHORITY
BRADLEY LAKE HYDROELECTRIC PROJECT
1990 BRADLEY RIVER WATER QUALITY REPORT
Table of Contents ••
List of Figures.
List of Tables.
INTRODUCTION.
DATAPODS •••••.••
Location •••
Servicing ••
TABLE OF CONTENTS
.........................
Page
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RESULTS. • • • • • • • • • • • . . . • • • • . • • • . . . • . • • . • • . . . . . . • . • • • • • • . • . . . . • • • • . . 2
Riffle Reach •••••
Tree Bar Reach.
Northfork •••••.
MISCELLANEOUS DATA ••
FUTURE STUDIES ••.•••••
ACKNOWLEDGEMENTS •••.
REFERENCES ••••
ATTACHMENT 1: Letters of Correspondence Between FERC
and the Alaska Energy Authority .••.••••••.
TJ9710 - i
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Figure
No.
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TJ9710
LIST OF FIGURES
Title
Data pod Locations, Bradley River, 1990 •••.
Surface and Intragravel Water Temperature
Riffle Reach:
December 1989 •••••••••
January 1990 ••••••
February 1990 ••.
March 1990 ••••..
April 1990 •.•.
May 1990 ••
June 1990 ...•
July 1990 ••••
August 1990 .•.•••••••
September 1990 ••••.
October 1990 •••.••...
..........
November 1990 •.•.•...•.••••••.•...•.••.
Yearly: December 1989 through November 1990.
Surface and Intragravel Water Temperature
Treebar Reach:
March 1990 •••••••••.•.
April 1990 ••••••••••
May 1990 .....
June 1990 ••••
July 1990 ••..
August 1990 .•..•
September 1990 USGS Data .•
October 1990 USGS Data ....
Yearly: March 1990 through October
Water Temperature Northfork Site:
December 1989 .•..
January 1990 ••••.
February 1990 ..
March 1990 ...
April 1990.
May 1990 •••
June 1990 •••••••.
July 1990 ......
August 1990 •••.
September 1990.
October 1990 •.•
1990 ....
November 1990 ...•......•.•.••••..••••••.•••••••.
Yearly: December 1989 through November 1990 ••••••
ii -
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Table
No.
1
TJ9710
LIST OF TABLES
Title Page
Water Temperatures and Turbidity Measurements
for Bradley River Near Treebar Reach................ 42
-iii -
INTRODUCTION
The purpose of this report is to comply with Article 33 of the Federal
Energy Regulatory Commission (FERC) license which states a water quality
monitoring program must be developed to evaluate water temperatures in
the lower Bradley River and heavy metal and hydrogen sulfide
concentration in Bradley lake.
The monitoring program was developed and presented in the Bradley lake
mitigation p 1 an pub 1 i shed in November 1985 {A 1 aska Power Authority,
1985). This is the fifth progress report covering the water quality
data collected during 1990.
Information presented includes:
temperatures of the Bradley River
Northfork of the Bradley River;
Bradley River.
DATA PODS
(1) intragravel and surface water
and surface water temperatures of the
and (2) turbidity measurements from
Surface and intragravel water temperatures continue to be collected
utilizing Model DP212 Omnidata Datapod digital recorders as described in
the 1988 Annual Water Quality Report {Alaska Power Authority, 1988).
In addition, this report includes data collected by the U.S. Geological
Survey (USGS). Their equipment is similar to the Energy Authority • s.
however, differs in the fo 11 owing manner. The data is co 11 ected and
stored utilizing single channel Omnidata datapod digital recorders.
Daily recordings include maximum, minimum, and daily averages and are
accurate to 0. 5°C. The surface water probe is p 1 aced into a white
perforated pipe for protection from debris within the river. The pipe
is then put directly into the river and weighted to hold it within the
water column. The intragravel probe is placed in a pointed, perforated
stake similar to that which is used by the Energy Authority. The stake
is driven into the streambed to a depth of approximatley 12 inches.
Each probe is individually attached to a separate datapod for recording
the data.
Though these methods are somewhat different than those used by the
Energy Authority, it shou 1 d prove to be a va 1 uab 1 e asset when fi 11 i ng
data gaps and during data analysis. The differences in methods do not
appear to be significant enough to question data comparison.
Location
Figure 1 depicts the locations of the temperature stations during 1990.
As discussed in the 1989 water quality report (Alaska Energy Authority,
1989), the Energy Authority discontinued the Tree bar Reach temperature
station along the Bradley River. However, the Federal Energy Regulatory
Commission {FERC) expressed concern over the deletion of this station
and other temperature station data gaps. In response, the Alaska Energy
Authority reestablished the Treebar Reach temperature station on
March 12, 1990 and instituted a more rigorous maintenance program.
TJ9710 -1 -
Attachment No. 1 includes the correspondence between FERC and the Energy
Authority regarding this problem.
Data collected by the USGS is from the Treebar Reach area of the Bradley
River and is included in the Treebar Reach section of this report.
Servicing
The servicing frequency was increased during 1990 in an effort to reduce
data gaps due to malfunctions. Beginning in March, each temperature
station was serviced once per month. Occasionally poor weather
conditions prevented helicopter access to the sites (particularly the
Northfork site). If this occurred, the helicopter was rescheduled for
the following day, or the next day weather conditions allowed safe
access, rather than waiting until the next scheduled visit to service
the datapods. These measures were successful in reduction of data gaps.
There were no major data gaps at the Riffle Reach temperature station
throughout the year. Only one gap occurred between January 8 and
January 23, 1990. However, during the servicing of the datapods, it
bacame apparent the intragravel water temperature was high in comparison
to surface water (a 7°C plus difference at times). In January and
February a thick ice layer prevented access to the probes for repairs.
On March 12, the probes were examined and appeared to be working
properly. On a subsequent visit to the site on March 14 the probes
appeared, again, to be functioning. However, on March 27 the
intragravel probe read -4.5°C, indicating total failure and the entire
station was replaced on April 13. From this point through the remainder
of the year, intragravel water temperature data was reliable. The
location of the temperature station and datapod remained the same.
The Treebar Reach temperature station suffered the same fate as in years
past. From the installation on March 12 until August 3 there were no
problems. On August 3, 1990, the intragravel probe malfunctioned
followed by the surface water on August 14, 1990. High water had
severed the probe wires from the stake. The temperature station was not
rep 1 aced for the remainder of the year due to dangerous 1 y high river
flows and ice conditions. Attempts will be made to replace the
temperature station in January 1991.
The temperature station at the Northfork worked we 11 throughout the
year. Three short data gaps occurred due to datapod malfunctions. They
were from December 30, 1989 to January 23, 1990, May 5 to May 24, 1990,
and from October 14 to October 24, 1990. The first and last problems
were due to battery failure, while in May the entire datapod needed
replacement.
RESULTS
The i ntragrave 1 and surface water temperature data for December 1989
through November 1990 is presented in graphic form, by month, and by
study site. An annual graph has also been produced for each study site
which illustrates average daily temperatures. These figures were
obtained by averaging the twelve hourly figures for each day. Complete
TJ9710 - 2 -
printouts of the data are not presented here due to their bulk, but are
available, upon request, from the Alaska Energy Authority.
Riffle Reach (Figures 2 through 14)
Surface water temperatures ranged from a low of about -2°C to a high of
approximately 12°C. However, the -2°C figure is in January (Figure 3)
and more than likely due to a datapod malfunction. (The datapod was
showing no display when serviced on January 23, 1990.) There has never
been a known occurrence where the water co 1 umn at Riffle Reach has
frozen to the streambed, causing surface water temperatures to fall
below zero. This would be the only way temperatures would fall to -2°C.
The coldest surface waters were more than likely in November, when
ambient air temperatures were very cold and surface water temperatures
were hovering around the 0.5°C mark (Figure 13).
Surface waters remained fairly consistent from December through April,
ranging from 1°C to 3°C (Figures 2 through 6). From April through July
temperatures rose steadily peaking on July 20 (Figures 7 through 9).
From July through November temperatures fell until stabilizing in early
November (Figures 10 through 13).
Intragrave 1 temperatures. during the period of April through November.
ranged from a low about 1°C in April (Figure 6) to a high of
approximately 8.5°C in July (Figure 9). The intragravel temperatures
remained coo 1 er than surface water temperatures until 1 ate September
when the temperatures exchanged positions with the i ntragravel water
becoming warmer (Figure 11).
Comparison of the surface and i ntragravel temperatures, show obvious
diurnal fluctuations within the surface water temperatures, while the
intragravel temperatures are more constant. During late April
(Figure 6) and early May (Figure 7) the intragravel temperature nearly
bisected the surface water fluctuations. In general, the two
temperatures are within 1 oc to 2°C of each other. The peaks of the
surface water diurnal fluctuations are often greater than 2°C above the
intragravel temperatures during the summer (Figure 9), while the valleys
are greater than 2°C be 1 ow the i ntragrave 1 temperatures during the
winter (Figure 12).
Treebar Reach (Figures 15 through 23)
The temperature station was reestablished at Treebar Reach on March 12,
1990. Surface waters ranged from a low of -0.5°C to a high of nearly
13°C. (A -0.5°C temperature at this station is probably correct. This
probe is in fast moving water which can be subject to super cooling.)
The water temperature increased from March through July (Figures 15
through 19). Temperatures then began to fall until the probes were
washed out in August (Figure 20). As at Riffle Reach, surface water
temperatures exhibit diurnal fluctuations (Figure 16}.
The intragravel temperatures range from a low of -0.1°C to a high of
just over 10°C. These temperatures also increase slowly until reaching
their maximum in July, when they began to gradually fall. The
TJ9710 - 3 -
i ntragrave 1 temperatures also show some di urna 1 fluctuation. This is
most noticeable during April (Figure 16), May (Figure 17), and the
beginning of June (Figure 18). The temperature fluctuations are never
as extreme as the surface water temperatures, but closely follow the
surface water pattern. After June, the intragravel water temperatures
show small, more stable fluctuations.
Two months of data collected by the USGS are included as Figures 21 and
22. This data represents daily averages for both surface and
intragravel water temperatures. The temperatures follow the same trend
as previous months. Diurnal fluctuations are not evident in this data
due to the averaging.
Comparison of the temperatures between Riffle and Treebar Reaches
indicate the two areas have very similar temperature regimes until May
when the intragravel temperatures begin to diverge (Figures 7 and 17).
Riffle Reach intragravel temperatures are cooler. During July the
surface water temperatures at both Riffle and Treebar Reaches approach
13°C (Figures 9 and 19). However, the intragravel temperatures for
Riffle and Treebar Reaches for July are approximately 8.5°C and 10.2°C,
respectively. By the end of September i ntragravel temperatures are
again nearly the same between the two study reaches.
Northfork of the Bradley River (Figures 24 through 36)
Water temperatures in the Northfork ranged from a 1 ow of -0.1 oc to a
high of approximately 13°C. The coldest temperatures were in the months
of February and November (Figures 26 and 35) when several negative
numbers were recorded. The water column more than likely froze
resulting in these negative numbers. Diurnal fluctuations do not become
apparent at the Northfork until April (Figure 28). They remain apparent
through August then again become less apparent.
The highest temperature, 13°C, occurred in August (Figure 32). This is
different from both Treebar and Riffle Reaches where the highest
temperatures were recorded in July. In genera 1, water temperatures
fluctuate to a greater extent in the Northfork than in the Bradley River
{Figures 14. 23 and 36). This is probably due to the larger volume of
water in the Bradley River which serves to dampen the temperature
fluctuations.
MISCELLANEOUS DATA
Several turbidity and water temperatures were collected by the Bradley
River fisheries study team from mid-July through early September. Table
1 presents the results of those measurements.
FUTURE STUDIES
Water temperatures will continue to be collected from the Bradley River
at Riffle and Treebar Reaches and the Northfork.
The reservoir began initial filling in November of 1990. Due to a very
cold November, no actual gain in reservoir elevation has been recorded.
TJ9710 - 4 -
The taking of water quality samples from the reservoir will be initiated
as soon as the reservoir actually begins to fill.
ACKNOWLEDGEMENTS
The Energy Authority wishes to thank Mr. John Morsell of Northern
Ecological Services for his help in obtaining the miscellaneous
temperature and turbidity data. In addition the USGS data provided by
Mr. Ron Rickman is greatly appreciated.
TJ9710 - 5 -
0
BRADLEY RIVER SYSTEM
MILES
(i) USGS GAGING STAT ION
A DATAPOD
BRADLEY
LAKE
FIQUIII 1
Datapod Locatlona, Bradley River, 1888-1880
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RIFFLE REACH: BRADLEY RIVER 1989
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RIFFLE REACH: BRADLEY RIVER 1990
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SURFACE TEMP
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DATE
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SURFACE & INTRAGRAVEL WATER TEMPERATURE
RIFFLE REACH: BRADLEY RIVER 1 990
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SURFACE TEMP
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15-Mar 19-Mar 24-Mar
DATE
INTRAGRAVEL TEMP
--r-
29-Mar
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SURFACE & INTRAGRAVEL WATER TEMPERATURE
RIFFLE REACH: BRADLEY RIVER 1990
9 ~----------------------------------------------------------~
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1
0 ~------------------------~--------------------------------~
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-2
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-5 -!..------------------------J
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01-Apr
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05-Apr
SURFACE TEMP
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DATE
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INTRAGRAVEL TEMP
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29-Apr
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SURFACE & INTRAGRAVEL WATER TEMPERATURE
RIFFLE REACH: BRADLEY RIVER 1990
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DATE
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SURFACE TEMP INTRAGRAVEL TEMP
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SURFACE & INTRAGRAVEL WATER TEMPERATURE
RIFFLE REACH: BRADLEY RIVER 1990
10 ,--------------------------------------------------
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01-Jun 05-Jun
--SURFACE TEMP
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15-Jun
DATE
.------------I
19-Jun 24-Jun
----INTRAGRAVEL TEMP
29-Jun
,
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RIFFLE REACH: BRADLEY RIVER 1 990
13 ~------------------------------------------------------------~
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1 1
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0 1 -Jul 05-Jul 1 0-Jul
SURFACE TEMP
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DATE
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·.--
24-Jul
INTRAGRAVEL TEMP
29-Jul
,
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SURFACE & INTRAGRAVEL WATER TEMPERATURE
RIFFLE REACH: BRADLEY RIVER 1 990
13 ,--------------------------------------------------------------,
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DATE
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SURFACE & INTRAGRAVEL WATER TtMPERATURE
RIFFLE REACH: BRADLEY RIVER 1990
13 ~----------------------------------------------
12
11
10
9 v-
8
7
6
5
4 -1--------------,----
01-Sep 05-Sep
--SURFACE TEMP
----.-----------.-------
1 0-Sep 15-Sep
DATE
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-.. \
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INTRAGRAVEL TEMP
29-Sep
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RIFFLE REACH: BRADLEY RIVER 1990
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DATE
SURFACE TEMP INTRAGRAVEL TEMP
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RIFFLE REACH: BRADLEY RIVER 1990 5 -r---
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SURFACE TEMP
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--
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15-Nov
DATE
19-Nov 24-Nov 29-Nov
INTRAGRAVEL TEMP
.,
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SURFAC & INTRAGRAVEL WAT R TEMPERATURE
RIFFLE REACH: BRADLEY RIVER 1989 -1990
13
12
11
10
9
8
7
6
5
4
3
2
1
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SURFACE TEMP
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Apr
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May
DATE
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Jun
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Jut
I
Aug
INTRAGRAVEL TEMP
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Oct
\
' '-'-
Nov
.,
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SURFACE & INTRAGRAVEL WATER TEMPERATURE
TREEBAR REACH: BRADLEY RIVER 1990
1.0 --------------l
I
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
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-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
-1.0 ---1 ---~--r ,-----T --~ -I --
1 2-Mar 16-Mar 19-Mar 22-Mar 26-Mar 29-Mar
DATE
SURFACE TEMP ----INTRAGRAVEL TEMP
,
c; c
:0 m
.....
~
u
C) w
0
I
w
I l:t:
N ::J ....... ~ I
l:t: w a..
:::!: w
1--
SURFACE & INTRAGRAVEL WATER TEMPERATURE
2.8
2.6-
2.4-
2.2-
2.0 -
1.8 -
1.6-
1.4 -
1.2 -
1.0 -
0.8 -
0.6-
0.4 -
0.2 iJ
0.0
-0.2-
TREEBAR REACH: BRADLEY RIVER 1990
:'1~1 j,. j~·l~ .... 1:1 ~~\\jj\\fl\
I I''~' I : I I I I ~
I I \'' 'I' l I I ' I 'l I I I I I -,,
'L /,t-1 I' ' : II I !I' I I I I I
I I
L
~
' J~ .. . I
\1 --, I I "lUI ~L .. ~ -~ -. ~~ ..-~ ,I
. .. I
u
~ 1.1
\j u~ ~ v v ~
:1'1 1'11 I II ,~ !I\ 1:1~ I I I I 1 I I I
11,1111111
1 I I I I I I I
I I ~ I I I
I I L I
I I
~ u \
u
\l
r
\J
-0.4 4r-------------.---------.----------.---------~--------~---------.--~
01-Apr 05-Apr 10-Apr 15-Apr 19-Apr 24-Apr 29-Apr
DATE
SURFACE TEMP INTRAGRAVEL TEMP
'T1
5 c:
:0 m
-&.
pl
0
" w
0
I
I
N w N
I a::
:::>
~ a:: w
D...
~ w
1-
SURFACE & INTRAGRAVEL WATER TEMPERATURE
TREEBAR REACH: BRADLEY RIVER 1990
5.0
4.5
4.0
3.5
3.0
! ~ 2.5 ~ ~ l I
2.0 I II n II II 11 1 ~' I I
I I
1.5 -i ~~. H'• ~1'• fl\ ~\'· IL r:l', ..
IIJ' I I, '.fl
1.o II \
I 0. 5 """"'r--------
01-Moy
I
05-May 1 0-May
SURFACE TEMP
~ ! n ,_ n j ~ I " ~'
I --
14-May 19-May
DATE
iw~.-. ~ '{ v v
I
I
I
I
~1----
25-May
~T
30-Moy
----INTRAGRAVEL TEMP
,
C5 c
:0 m _,.
:....a
u
~ w
0
w
I 0:::
N ::J w 1-
I <(
0::: w a..
::!! w
1-
SURFACE & INTRAGRAVEL WATER TEMPERATURE
TREEBAR REACH: BRADLEY RIVER 1990
10.0 ---·-----------~-· -~-·-··---~-----·· ----
9.0
8.0
7.0 l A f \ A 1\ 1\ I /-:
I
6.0 , • , .t-v,.~·~· j I
5.0 • ~ ~ ~ ~ ~ ~ ~ A MA ~' -j _, N\N·~
4.0
3.0
2.0 ~,.______
01-Jun
---T--
05-Jun
SURFACE TEMP
I --T -----, ----. -------.
1 0-Jun 1 4-Jun 19-Jun 23-Jun 28-Jun
DATE
INTRAGRAVEL TEMP
.,
C5 c: :n m
...&.
())
SURFACE & INTRAGRAVEL WATER TEMPERATURE
TREEBAR REACH: BRADLEY RIVER 1990
1 3.0 -.-----· --------------· ----------·
12.0
11.0 u
(.!) w
0
I 10.0 ,J
w
I
I a::: r\ v .,
N ::>
C)
.A ~ I 9.0
c
a::: ~ -.Af.vill
_, :tl
w
J m
0...
:;:'!
-'
w r •
~
I--h ,J
I '-,.-\J_,
8.0 I I.
I
' I
,'f\ J I
1
\ I
7.0 -I
6.0 -+------·---------r·-----· ---.------·----·--·-r··---------------r···-------~--
01-Jul 05-Jul 1 0-Jul 14-Jul 19-Jul 23-Jul 28-Jul
DATE
--SURFACE TEMP INTRAGRAVEL TEMP
u
(..!) w
0
I
w
I 0:::
N ::J
(Jl ~ I
0::: w
D..
~ w
1-
SURFACE & INTRAGRAVEL WATER TEMPERATURE
10.0 ~-
1
9.0 ~
8.0
7.0
6.0
5.0
4.0
3.0-
I 2.0 -1
1-
TREEBAR REACH: BRADLEY RIVER 1990
~:: ' -----r ---
11 L -------!J-.11'--..--J
01-Aug 05-Aug 1 0-Aug 14-Aug 19-Aug
DATE
SURFACE TEMP ----INTRAGRAVEL TEMP
,
i5 c :a m
1\) p
I
N
0'\
I
SURFACE & INTRAGRAVEL WATER TEMPERATURE
USGS DAILY AVERAGE VALUES FOR TREEBAR REACH: BRADLEY RIVER 1990 1 0 -,-----~--·· ···-·-···
9.5
9
u
C> 8.5 w
0
w a:::
:::::>
~ a::: w
D..
~ w
f-
8
7.5 ----------,
7 ~-j
I
6.5
6 -,--,----. .I I I I I I I I I I I I I I I I I I I I I I I I
01-Sep 06-Sep 11-Sep 16-Sep 21-Sep 26-Sep
DATE
--SURFACE TEMP ----INTRAGRAVEL TEMP
.,
5 c
~ m
N
:-'-
u
'-' w
0
w n::
I :::>
N ....., ~ I
w
D..
~ w
1-
SURFACE & INTRAGRAVEL WATER TEMPERATURE
USGS DAILY AVERAGE VALUES FOR TREEBAR REACH: BRADLEY RIVER 1990 7.0 -----
6.5 \
\
\
\
\ 6.0 ------,
5.5
5.0
4.5
4.0
3.5
3.0 -,--I I I I I I -~
01 -Oct 06-0ct
SURFACE TEMP
\
\
\
\
\
I I T
11-0ct
\
\
\
\
\
\
\
\
\
\
--\
\
\
\
\ ,_---\
\
\
\
\---
I I I I -T----.----..,---.---T---.--· ... I----·· ---T --
16-0ct 21-0ct 26-0ct
DATE
----INTRAGRAVEL TEMP
,
B c :::n m
1'\)
!'l
u
C) w
0
I
w
I et:
N :::J (X) 1-I <(
et: w n.
~ w
1-
SURFACE & INTRAGRAVEL WATER TEMPERATURE
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
-1.0
12-Mar
TREEBAR REACH: BRADLEY RIVER 1990
, I
I
11-Apr 11-May
SURFACE TEMP
I
I
I
....... ,,,
/
/
~----T--r-··-----T--
11 -Jun 11 -Jul 1 0-Aug 23-Sep 23-0ct
DATE
----INTRAGRAVEL TEMP
,
5 c:
:::.0 m
~
l'--l
u
D w
0
I
w
I 0::
N ::::>
1.0 ~ I
0:: w
0..
~ w
I-
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1 989
3 ~----------------------------------------------------~--~
2
1
0
-1
-2 (\
-3
-4
-5 'Jill Ill Ill Iii I I I I 11111111111 I II I 1111111 I IIIII It 1111111111 II I 1111111111 I II 111111111111 I I Jill I 111111111 I 111111 I I tllltlll I Ill~
01-Dec 06-Dec 11-Dec 16-Dec
DATE
--SURFACE WATER TEMP
21-Dec 26-Dec 31-Dec
.,
C) c
:0 m
I\)
~ .
0.9
0.8
0.7
0.6
0.5
(.) 0.4
C) 0.3
w 0.2 0
I 0.1
w 0 I 0:::
w :::> 0 !;{ -0.1 I
0::: -0.2 w a..
~ -0.3 w
1--0.4
-0.5
-0.6
-0.7
-0.8
-0.9
-1 ' I I
23-Jan
1---r
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
r--r-·1 I I I I I .--r Tj -'l --, ---.-r-r--r·--r 1 r· -t· r--, --T-r--.
25-Jan 27-Jan
DATE
-SURFACE WATER TEMP
29-Jan 31-Jan
,
C5 c:
:::0 m
1\)
(11
u .
" w
0
I
w
I a:: w :::J ....... !;{ I
a:: w
11.
::.:!! w 1-
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
0.8 -
0.6 -,...,
0.4-
0.2 -
0
-0.2-
-0.4-
-0.6 -' I I
u 'w I
-0.8-
-1 -I . .
-1.2 -
-1.4-
-1.6 -
' • • • • • " •Tm~~p rm mm·•rmTTTfnTO mmrmnn•1nrm m nmm • 'lm n n • n nn='l"~ -1.8 -
-2 ....
01-Feb 06-Feb 11-Feb 16-Feb
DATE
SURFACE WATER TEMP
21-Feb 26-Feb
-n
C) c
::0 m
1\)
!=»
(.) .
" w
0
I
w
I 0::::
w ::::> N ~ I
0:::: w a..
:!! w 1-
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
2 ·-----
1.8 -
1.6 -
1.4 -
1.2 -
1 -,.., n n
0.8-
0.6-,........, L-.J ~~.....~
0.4-
0.2-
0
-0.2-
-0.4-
-0.6 -
-0.8-
-1 rTTTTTTTT.TrllllTlTITJTTTTTlJliTIHnHTJTHTifltriJI II lllHTTTl 111111 IH II lfrllJ llrJH 1111111111 IITJllll I I lrl I II H1 I I I 'J
01-Mar 06-Mar 11-Mar 16-Mar
DATE
--SURFACE WATER TEMP
21-Mar 26-Mar 31-Mar
,
Ci c
:xJ m
1\.)
:...a
u
" w
0
w
I a::
w ::J w ~ I
a:: w
0..
~ w .....
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
3
2.8-
2.6 -
n
2.4-
2.2 -
2 -n n
1.8 -
1.6 -
n I I n I II I I u u I I I I I I II I I
1.4 -
1.2 -
1 -t--1 n I ,.....--, n n ~'--' u '--' u
0.8-
0.6-
I u L_j u UU'--''--'L..J L.J L.J L.J
0.4-
0.2 -
0 'I I I I I II I I I I I I I I I I I I (II I I I I I I I I I I IiI I IIIJ I I I I IIIII I I II I I I I I I J I I I I I 111111 I I I I ill I Jllll I 11111111111111(1 I I I llllllli I I I I I I I
01-Apr 06-Apr 11 -Apr 1 6-Apr 21 -Apr 26-Apr
DATE
SURFACE WATER TEMP
'T1
5 c
:D m
N
pl
I w
""" I
u
" w
0
I
w
~
::::J
I-
4:
~ w a...
~ w
I-
7
6
5
4
.3
2
1
01-May 03-May
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1 990
, 1 , 1 , ~-, 1 1 1 , 1 1 1 1 1 ~-1 1 1 1 , 1 1 1 1 1 1 1 1 1 1 1 1 , -r-.
05-May 07-May 25-May
DATE
SURFACE WATER TEMP
27-May 29-May 31-May
,
Ci c
:0 m
t\)
<.0
u
" w
0
I
w
I 0::
w ::::> c.n ~ I
0:: w
0..
~ w ._
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1 990
12 -------------------------------------------------------------.
11-
10 -
9 -
8
7 ~ ~~A A~~~
6
5 --tl \ I \ I \1 \1 \1 \1 U U ~ ~vv~ ~
4
_--__ 'I V V
3 'liilllillilliilliilliillillilliillllliiJIIIIIIJJiliilllliil[liilln
lTll TT I I TJI ITTl ITTT1TTTTTTTTll-rTTTT
0 1-Jun 06-Jun 11-Jun 16-Jun
DATE
SURFACE WATER TEMP
21-Jun 26-Jun
I I l C I I I I I
, -C) c
:0 m
(..)
~
(.)
'-' w
0
I
w
0:: I ::J w
~ 0'1
I
0:: w
0...
~ w .......
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
13 ,-------------------------~~~~~~~---------------~
12 -
11 -
10 J. l 1\ 1\ ~ l 1\1\1\1\1\ 1\ ~
9
A
8
' 7 -i I I II ~ II II I I I I I ~ ~ \I ~ ~ I I II
~ \1 \1 . t I I 6 _,
5 l,' '''II liliillllllllll I I I ITTTnWmTTf' ITlTTTTTTTTTI rTTTllTTTrl I IITTTT I IIITTTlllTllll' I nrnT II I l"fJlllll nrniTTTmm
11-Jul 16-Jul 21-Jul 26-Jul 31-Jul
01-Jul 06-Jul
DATE
SURFACE WATER TEMP
!!
G') c
:xJ m
(.rJ
:-"
u
C)
w
0
w
I et:
w :::J
'-.1 .....
I -c{
et: w n.
:::E w .....
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
14 .-------------------------------------------------------------~
13
12
1 1
10
vvv vv ~~v~v ~ ! ~ 9
A h A
8
7
6
5 , ................... 1'' 11111111111 IIIIII(IIIIIIIIIIIIIIIIIIIJII IIIIIIIIIIIIIIIIIJIIIIII II I illillllllliil 11111111111111 I 11(11
01-Aug 06-Aug 11-Aug 16-Aug
DATE
--SURFACE WATER TEMP
21-Aug 26-Aug 31-Aug
'TI c;
c
:::0 m
(..)
~
u
'-' w
0
w
I 0:::
w :::::> co ~ I
0::: w a...
:::E w r-
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
11 -~-~---~~------------~~ -------
10
9
8
7
~ v vvy\jJV A 6
A A A l
5
4
3
2 I 1 1 1 1 1 1 rrT~lTTTTTTTTfTTTTTlTTTTTTTTTT"lTJTTTTTll n rriTTTTTl flTTI TTTTrt n ITll"TTTTJ mTn~ 1 n 1 IT 1 n 1 n 1 Ti liTrTr TTTI 1 1 1 1 1 1 I
01-Sep 06-Sep 11-Sep 16-Sep
DATE
SURFACE WATER TEMP
21-Sep 26-Sep
'T1
B c
::0 m
U)
U)
u
"' w
0
I
w
I 0::
w :::> 1.,0 !;( I
n:::: w a..
~ w
1-
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990 6 .......--·
5
4
J
2 vw v v 1
0
-1
-2
-3 ' I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ~,.~~rt~ rTTTTTT-.T ITTTJ''"ItTTTl
01-0ct 05-0ct 09-0ct
DATE
--SURFACE WATER TEMP
1 J-Oct 27-0ct
,
5 c
JJ m
w
~
31-0ct
0.9 -
0.8 -
0.7 -
0.6 -
0.5 -...,
u 0.4 -
C) 0.3 -
w 0.2 0 -
0.1 -
w 0 I a:::
-to-:::J
0 ~ -0.1 I -
a::: -0.2 w -
n.
~ -0.3 -w
I--0.4 -
-0.5 -
-0.6 -
-0.7 -
-0.8 -
-0.9 -
-1 I •I I
01-Nov
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1990
--· -------·----------~~----·--·------··-·------·--~----·------
~
I I .
06-Nov
. . I .. . .. . I
11-Nov 16-Nov
DATE
-SURFACE WATER TEMP
,.....,
·• . ... I • " •
21-Nov
------. --
loj
• I I
26-Nov
I •I I I
.,
Ci c
::0 m
tN
(11
12
1 1
10
9
8
0
'-' 7 w
0
6
I
w 5 0:: I ::J ~
~ 4
.....
I
0:: w
3 D...
~ w
1-2K
1 '
I
0 _j
-1 -t
-2
Dec Jan
WATER TEMPERATURE
NORTHFORK OF THE BRADLEY RIVER: 1989 -1990
.T ..
Feb Mar
T ··r ·r T 1
Apr May Jun Jul Aug
DATE
SURF ACE WATER TEMP
I
Sep
I
Oct
-n
5 c :n m
w
!'>
TABLE 1
Water Temperatures and Tubidity Measurements for
Bradley River Near Treebar Reach*
DATE WATER TEMP. (C) TURBIDITY (NTU)
JAN 26 84
JUL 17 10.0 27
JUL 18 11.1 23
JUL 19 10.6 25
JUL 24 11.1 27
JUL 25 11.1 31
JUL 26 10.6 25
JUL 31 10.0 32
AUG 01 10.0 31
AUG 02 9.4 31
AUG 07 10.6 29
AUG 08 10.0 30
AUG 09 10.0 26
AUG 14 10.0 36
AUG 15 11.1 36
AUG 16 11.1 33
AUG 21 10.0 40
AUG 22 10.0 37
AUG 23 10.0 39
AUG 28 8.9 57
AUG 29 9.4 40
AUG 30 8.9 42
SEP 04 9.4 39
SEP 05 10.0 38
SEP 06 9.4 40
SEP 11 9.4 40
SEP 12 9.4 41
* Source: Bradley River Salmon Escapement Monitoring Study, 1990.
TJ9710 -42 -
REFERENCES
A 1 aska Power Authority,
Hydroe 1 ect ric Project.
Engineering Corporation.
Mitigation
Report
Plan, 1985. Bradley Lake
Prepared by Stone & Webster
Alaska Energy Authority, Bradley River Water Quality Report, 1989.
Bradley Lake Hydroelectric Project. Federal Energy Regulatory
Commission Project No. P-8221-000.
TJ9710 -43 -
TJ9710
ATTACHMENT NO. 1
Letters of Correspondence Between FERC and
the Alaska Energy Authority
-44 -
'. '
FEDERAL ENERGY REGULATORY COMMISSION
FEB 1 3 igso
·-'
. ..J -
-:.(.=~ -
Mr. David R. Eberle
Alaska Energy Authority
P.O. Box 190869
Anchorage, AK 99519-0869
Dear Mr. Eberle:
WASHINGTON 0 C 20426
Project No. 8221-015--Alaska
Bradley Lake Hydro Project
Alaska Energy Authority
We acknowledge receipt of the 1989 Bradley River Water
Quality Report that ycu filed pursuant to article 33 en
January 4, 1990. The report generally complies with the
environmental requirements discussed in the 1985 Bradley Lake
Hydroelectric Project Mitigation Plan. However, we have concerns
regarding some of the water temperature data you submitted.
Three monitoring stations were in use, and significant
malfunctions were reported at two stations. Tree Bar Reach only
reported data for two months, while the North Fork datapod's
information for May, June, and July were erratic. At Riffle
Reach, differences in water and gravel temperature were reported
which you said''··· [did] not appear to be reasonable." These
problems made the data on water temperature both limited in
amount and usefulness.
We fully appreciate the difficulty of collecting field data,
particularly in Alaska's rugged country. However, the
information contained in this year's report makes it difficult
for us to assess the project's possible impact on salmon
reproduction. Next year's report must contain far fewer gaps and
unexplained errors in temperature data. Changes in field
procedures may be needed. For example, datapods could be
maintained more frequently to ensure their proper operation.
Please respond with your plans for improving the water and
intragravel temperature data within 90 days of the date of this
letter. If you have any questions, please call Mr. Peter Lickwar
at (202) 357-0656.
CG r r:. ESPONDENCE DISTRIBUTION
ACTION: COPIES:
~
L"'i ::...Q<H~: _ .. )!I ,
Sincerely,
J;) (_ --~).))/ (_/
VJ. Mark Robinson
Director, Division of Project
Compliance and Administration
cc: Mr. Brian Alee
Alaska Department of Fish and Game
P.O. Box 3-2000
Juneau, AK 99802
Mr. Larry Dietrick
Alaska Dept. of Environmental Conservation
P.O. Box 0
Juneau, AK 99811
Mr. Rowan Gould
u.s. Fish and Wildlife Service
Alaska Regional Office
1011 E. Tudor Road
Anchorage, AK 99503
Mr. Jonathan Pollard
National Marine Fisheries Service
Box 1668
Juneau, AK 99802
Mr. Robie Russell
Environmental Protection Agency
1200 6th Avenue
Seattle, WA 98101
Mr. Dave Trudgen
Alaska Energy Authority
P.O. Box 190869
Anchorage, AK 99519-0869
Alaska Energy Authority
AEA/FERC/0190
April 20, 1990
Mr. J. Mark Robinson
Director, Division of Project
Compliance & Administration
Federal Energy Regulatory Commission
825 N. Capitol Street, N.E.
Washington, D.C. 20426
Subject: Project No. 8221-015--Alaska
Bradley Lake Hydroelectric Project
Bradley River Temperature Studies
Reinstallment of Treebar Reach Temperature Station
Modification of Monitoring Procedures
Dear Mr. Robinson:
In response to your letter of February 13, 1990, the Alaska Energy Authority
has instituted the following changes in an attempt to improve the quality and
consistency of data collected from the water temperature stations located in
the Bradley River and the North Fork of the Bradley River. On March 12, 1990
the Treebar Reach temperature station was reinstalled in the Bradley River.
This station is recording surface and intragravel water temperatures.
In addition, the Energy Authority has increased the monitoring effort to
reduce data gaps. In the past, the datapods were serviced about once every
six weeks. This monitoring effort will be increased to once every four weeks.
Occasionally, poor weather conditions prevent helicopter acccess to the sites
(particularly the North Fork). In the past when poor weather prevented access
to the sites, the datapods would generally not be serviced until the next
scheduled visit. From this time forward, should weather prevent access to the
da tapods, the he 1 i copter wi 11 be re-schedu 1 ed the fo 11 owing day or the first
day that weather will allow safe site access.
To further help your analysis of the temperatures in the Bradley River we have
enclosed copies of data collected by the U.S. Geological Survey (USGS) at
their gage house temperature station. They too have had problems with
i ntragrave l data integrity due to washouts. However, their surface data
record is quite complete and should prove beneficial in your analysis. The
enclosed graphs depict daily maximum and minimum temperatures of surface and
i ntragrave 1 water temperatures for water years 1986 to present. Should you
wish to receive this data in tabular from, please contact Mr. Bruce Bigelow at
the Anchorage office of the USGS at (907) 271-4153.
= PO Box AM Juneau. Alaska 99811 (907) 465-3575 = PO Box 190869 701 East Tudor Road Anchorage. Alaska 99519-0869 (907) 561-7877
AW8069{1)
Mr. J. Mark Robinson
April 18, 1990
Page 2
We believe this adequately addresses the concerns outlined in your letter.
The actions taken should improve the overall quality of the temperature
database. We appreciate your coiTITlents on this matter. If you have further
comments or concerns, please call Dave Trudgen at 235-6004.
Sincerely,
I ~\I ~/(J 1//L'' ~./v-_df I~ ~
David R. Eberle
Project Manager
DT:DRE:amw
cc: Brian Alee, Alaska Department of Fish & Game
Larry Dietrick, Dept. of Environmental Conservation
Rowan Gould, U.S. Fish & Wildlife Service
Jonathan Pollard, National Marine Fisheries Service
Robie Russell, Environmental Protection Agency
Thomas Arminski, Alaska Energy Authority
Peter Lickware, Federal Energy Regulatory Commission
AW8069(2)
FEDERAL ENERGY REGULATORY COMMISSION
.-.. ......... !
~-·
Mr. David R. Eberle
Alaska Energy Authority
P.O. Box 190869
Anchorage, AK 99519-0869
Dear Mr. Eberle:
WASHINGTON. D C 20426
Project No. 8221-015--Alaska
Bradley Lake Hydro Project
Alaska Energy Authority
Thank you for your letter dated April 20, 1990. By letter
dated February 13, 1990, we acknowledged receipt of the 1989
Bradley River Water Quality Report that you filed pursuant to
article 33 on January 4, 1990. However, we expressed some
concerns regarding gaps in the intragravel and surface water
temperature data.
Your letter outlined the measures you were taking to avoid
future problems in data collection. You stated that the Treebar
Reach temperature station had been re-installed on the Bradley
River, and is recording intragravel and surface water
temperatures. Also, the service period for datapods has been
decreased from six to four weeks. In the past when poor weather
prevented access to datapod sites, servicing was delayed until
the next scheduled visit. Now servicing will be re-scheduled for
the following day or the first day that weather allows access.
You also forwarded surface water temperature data from the
U.S. Geological Survey's station on the Bradley River as a
supplement to your data.
The actions you have taken should ensure future compliance
with article 33. Thank you for your cooperation in this matter.
If you have any questions, please contact Mr. Peter Lickwar at
(202) 357-0656.
Sincerely,
I UA\h l ~-Ail'
tJ. ;J;; Robinso
,D· ector, Divi ion of Project
'C mpliance and Administration
cc: Mr. Brian Alee CORRESPONDENCE OISTRIBUTJm.:
Alaska Department of Fish
and Game
P.O. Box 3-2000
Juneau, AK 99802
ACTION:
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Mr. Larry Dietrick
Alaska Department of Environmental
Conservation
P.O. Box 0
Juneau, AK 99811
Mr. Rowan Gould
u.s. Fish and Wildlife Service
Alaska Regional Office
1011 E. Tudor Road
Anchorage, AK 99503
Mr. Jonathan Pollard
National Marine Fisheries Service
Box 1668
Juneau, AK 99802
Mr. Robie Russell
Environmental Protection Agency
1200 6th Avenue
Seattle, WA 98101
Mr. Dave Trudgen
Alaska Energy Authority
P.O. Box 190869
Anchorage, AK 99519-0869