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ALASKA POWER AUTHORITY
SUSITNA HYDROELECTRIC PROJECT
FOil:
WILDLIFE AND BOTANICAL RESOURCES
IMPACT ASSESSMENT AND MITIGATION PLANNING
HAII.ZA-EBASCO StJSITNA JOINT VENnJRE
711 H mEET
ANCHOIACC, ALA!!X.A 99SOI
BY:
LGL A1.ASlA II!SI!AlCH ASSOCJA11!S, INC.
~ W. NOJl11fEI1( lJGHTS BLVD.
ANCHOIAG£, Al.ASIA MD
~NUMIID: 1
DATt: JAil 2 1 ~
SUSITNA HYDROELECTRIC PROJECT
WILDLIFE AND BOTANICAL RESOURCES
UIPACT ASSESSMENT AND l'!ITIGATIO!\ PLA..."rniNG Sl"MMARY
Report b~·
LG L Alaska Research Associates, Inc.
Under Contract to
P.arza-Ebasco Susitna Joir.t Venture
Prepared for
Alaska Power Authority
REVISION I
FEBRUARY 198 5
,
'-
C i S 1 hlr.:i.. .1~.-'J
-'
PREFACE
This document provides an overview of potential impacts of tne
Susitna Hydroelectric Project on wildlife and botanical re-
sources of the project area, and indicates t~e status of plan-
nin~ to mitigate those impacts. The purpose is to provide a
working record of impact assessment and miti~ation planning in
the form of a summary that is updated periodically . During
the course of major enerRY development projects, the tracking
of environaental concerns from impact assesSEent through miti-
gation proposals and subsequent action can become a cumbersome
process. The followin~ summary is organized in matrix format
to ease this process and to provide quick reference to current
impact and mitigation reasoning. This record is presented to
encourage input by all interested parties and to inform
decision-makers of the current state of thou~ht concerning
relevant resource issues.
Much of the information contained in this planning summary is
based on Exhibit E of the project license application to the
Federal Energy Regulatory Commis~ion {FERC) {APA 1983a). How-
ever, many of the impact assessments and mitigation plans pre.-
sented in the license application have been ccnsiderably re-
fined since license application s ubmittal in February 1983,
with additional quantificat ion and detail achieved through
further baseline study and data analysis. ~pda tes and refine-
ments are being documented on a continuing basis in successive
revisions of the project ~iti~ation Plan for ~ildlife and
Botanical Resources {LGt. 1985) and in individual reports pre-
pared by project biologists. The planning summary provides an
ongoing tracking system for these updates and refinements, and
contains references to the appropriate source documents.
Descriptions of ongoing and planned s tudies are from the
Alaska Power Authority's Fiscal Year 1985 plan of study for
terrestrial programs .
For completeness, all potential botanical and wildlife impact
mechanisms identified in project-related documents and reviev
comments on those documents are included here . Most of the
potential impact mechanisms listed in the matri~ have been
identified by project biolof!ists on the basis of studies spon·-
sored since 1980 by the Alaska Power Au thority. Other impact
mechanisms suggested by resource age~cies a re a l so listed.
Although they have received attention, the inclusion of thes e
additional hypotheses does not iJr.ply that they are based on
results of studies by project biologists, or that the sug-
gested mechanisms are ~xpec ted to produce i c portant impacts.
A potential impact mechanism (whether adverse or heneficial)
is considered to be important if, in the judgment ~f pro j ect
biolo~ists, that mechanism is likely to produce an observable
and persistent change, not attributable t o natural fluctua-
tions, in the size or productivitv of a wildlife population ,
or if the mechanism is likely t o reduce the oaxicum sustain-
able size of a wildlife population {LGL 1985). About 21
percent of the impact mechanisms listeci in the planning sum-
mary are currently considered to be in this cate2ory. For
most of these, sufficient information alreadv exists to sup-
port ongoing mitigation planning, and additional studies a re
not considered to be necessary. The remaining potentiallv
important me chan isms are receiving furtl:er studv, and the list
of topics requiring such study is shorteninR as results
accrue.
Potential impact mechanisms not judged to be important will
not be subject to further studies or mi tigation planning
beyond standard engineering and construction practice and, in
some cases, field monitoring.
The rationale fo r determining whether a potential impact mech-
anism is or is not important is provided in Section 2 (Species
Accounts) of the wildlife mitigation plan (LGL 1!85). Thet
document is cross-referenced with this ?lanning suema ry .
Future releases of the planning summa~: will he consistently
revised to reflect current information on impact assessment
and mitigation planning as reported in the wildlif~ mitigation
plan.
The planning summary is organized to show for each potential
impact mechanism the current assessment status, on~oing or
planned studies, monitoring plans, and proposed mitigation
measures. The major column headings describe the s teps in t~e
planning process as follows:
I) Affected Species or Grouo: lists each species or group
of species of concern in t h e project area and surround-
ing region.
II) Potential Imp ac t ~lechanis!!l: br:!.efly e~p lains how spec:!.-
fic project components oay affect the lis ted speci es or
group. ~lechani sms judged to be :!.::~oortant are under-
lined .
'continued on next page)
III) Impact Assessment Status: pr~vides an evaluation of the
potential impact, including its perceived importance to
the affected species or group and any quantification of
the impact that has been developed.
IV) Ongoing and Planned Studies: provides a summary of
investigations in progress or planned for the near
future that are re'evant to refining the particular
impact assessment or proposed mitigation measures.
V) Proposed ~onitoring Activities: summarizes field moni-
toring programs that are proposed to be conducted during
project construction and operation to document impacts
and to assist in mitigating them.
VI) Proposed Miti~ation Measures: summarizes measures that
have been proposed to assist in miti~ating the effects
of the pertinent impact mechanism.
In cases where the contents of a matrix cell have been changed
from the previous revision of the planning summary, the text
is preceded by an asterisk (*).
Each cell of the matrix can be uniquely identified by column
(vertical) and row (horizontal). To identify a particular
cell, it should be cited first by the Affected Species or
Group letter; second, by the Impact Mechanism number; and
third, by column heading Ill, IV, V, or VI . For example, the
cell on page 1 describing proposed measures to mitigate
permanent loss of moose habitat due to the impoundments and
other permanent facilities would be cited as A-1/\I. This
format provides a shorthand notation that allows specific
topics within the planning summary to be cited quickly and
precisely in communications concernin2 impact assessment and
mitigation.
A Literature Cited section is provided at the end of this
document. Successive revisions of the planning summary will
include an increasing number of citations; the goal is to
provide document and page references for all project-related
reports and other pro)ect communications in which a particular
impact mechanism, impact assessment, existing or proposed
study, proposed monitoring pro~ram, or proposed mitigation
plan is discussed.
Ongoing studies sponsored by the Alaska Power Authority are
continuing to provide new and updated information pertinent to
the evaluation of potential impacts. Subsequent revisions of
this document will include information provided by these
studies and by r efinements to impact assessments a nd mitiga-
tion plans, in some cases altering the conclusions contained
herein.
A. Botanical ~esources .••••••••••••
B. Moose •••••••••..•..••.••••••••••
C. Caribou •.••••••..•••••.•••••.•••
D.
E.
F.
G.
Dall Sheep
Brown Bear
Black Bear
Wolf ••••••••••••.•••.••• • •. • · .. ·
R. l<olverine •••••••••.....•.•••••••
t. Belukha •••••••••••••••••••••••.•
J. Lynx •.••••••••••••••••••..••••••
K. Coyote ••••••••••••••.•••••••••••
L. Red Fox ••••••.••••••••••••••••••
M. Beaver ••••••••••••••••••••••••••
1i
20
22
25
2S
3 0
31
31
32
3:
33
N. Muskrat • • • • • • • • • • • • • • • • • • • • • • • • • 35
TABLE OF CO?>'TP..IS
0. River Otter ••••••••.••••••••••••
P. Marten ••••••••••••..••••••••••••
Q. Mink ••••.•••..••••..•.••••••.•••
R.
s.
T.
t'.
Weasels ••••••••••••.••••••.•••••
5111811 Mammals •••••••••••••••••••
Waterbirds
Bald Eagle
V. Golden Eagle ••••••••..••••••••••
w. C.yrfalcon
X. Pere~rine Falco n ••••••••••••••••
Y. Other Raptors and Raven •••••••••
z. Terrestrial Birds
References ••••••••••••••.•••••••••••
J6
39
40
42
43
44
45
47
48
49
49
50
52
(I)
Affected
Speciea or
Croup
(A) Botanical
Jesourcea
(11)
Potential
llopact
!lechM~in
(1) Per.anent lou of venu·
t on r~W tl ICCC!II
r a, tra.,. •• on nea • .1
odier penoanent !adlldu.
(Ill)
x...,...,c
Alaa1-t
StatUI
Penoanent loss of about "5,688
acru of pri .. rUy foreu and
shrubland veptatlon t)-pel
I APA 1983b),
(lV)
On10ins
and Planned
Studies
'1:63,360·sca1e ve1etatlon up·
ping eoopllaaitlng und«ruory
shrub speciea hal been c.-pie·
ted and ls current 1 y being
di11itlted (Jan. 1985) (APA
198'-, FY85 !uk 8). lletlands
oapping h11 been completed
(APA 198'-, FY85 Task 7).
These zup products vU 1 pro·
vide 80re precise quant lflca·
tion of veptation types and
acrea!el to be affected.
(V)
Propo1ed
Monitoring
Actlvitlel
lVI)
Proposed
Miti!lation
Me• suns
,....., 1
ll!l tlgatlon plan provide& for 11inl.aiza·
tton. recttfic.atton, reduction, and
coapensatton of i mpac ts in a vari~tv of
vays 1APA 1983a, pp. £·3·252 to 285).
~ltntclze facUlty dl~~enslons IAPA
1983a , p . £·3·291 n l ).
Consolidate structures (APA 1983<1, p.
£•3·291 a2),
Site fac n ltles ln areal of lov blozuu
IAPA 1983<1, p . £·3·291 ~3).
Site f acUlties to ctnl•lte clearina of
less abunclant ve~uation types (APA
1983a, p. £·3·291 •4).
Site focll ttles to minimize clearing of
veptation types productive as vUdlife
habitat c.-ponents IAPA 1983<1, p. E·l·
291 •sl.
Mt.nt.et ze volu. re.ouire.ents for borrow
utroction (APA 19Sla, p. £·3·291 ~).
Disposal of 1poU vtthln the impound·
menu or prev iously excavat~ areas
I APA l983a, p. £·3·292 •7l.
Acquisition of replaceoent lands for
1..8ple:entatton of habitat enhancetnent
toeasures (APA 1983a , p . E-l-292 1'12),
Avoi~1r.ce of the Prairie Creek, Stephan
Ulc.e, !'o& Lakes, and tndian River anu l
by access routlns I APA 1983a, p. E·l·
2 92 d l:.) 0 •
Siting and allgru>ent of facilities to
avoid vetlands to the oaxiln.ml _.xtent
feasible (APA 1983a, p . E-3-292 •18).
A!eftc; coordination and participation
in detailed planntn; of civil engineer·
ing measur~• to minicize potential vet-
lando !~:~pacts (APA 198la , p. £•3·292
•19),
l!in!Jo!ze lou of fores t areas throu@h
altgru:ent o£ access roads and tranmts -
ston corTidors and othe r measures (APA
198la, pp. £·)·539 n2), £·3·525 61,
£·3·526 "2).
(1)
Affected
Species or
Croup
(A) Botanical
leaources
(cont.)
(11)
Potmttal
loopKt
!lechanha
(2) Teosporar;r loos or al tera-
tlon of vegetation fr .. teapo-
rary facilities, dhturt>ed
areas, and tran•tssion 1 ines.
(tit)
loopKt
A•sea.-nt
Statui
Teaporary loss or alteration
of about 15,267 acres of vege·
tat ion CAPA l983b).
(IV)
Ongo!na
and Planned
Studiu
(V)
Proposed
!loni t o rin&
Activities
~.oni tor protress of reha-
bilitation to !dentHy lo-
cations requiring f urther
attention (APA 198l.a, p.
E-3-292 •lll.
(\'1)
Proposed
~lt!gat!on
~.easure.s
Hlniclze factl ltv dilltftsiona I APA
1983a, p. E-3-29i #2).
Consol!date structures (APA 1983a, I'·
E-3·191 12).
Site !acUities in are.11 of lov btomaas
(APA l983a, p. E-3-291 •3),
Slte f acilities to mi11imize clearing of
less abundant vegetation types ( APA
1983a, p. E-3·291 ,.4).
~lnlr.ize volume requir~ts for borrow
extraction (APA 1983a , p. E-3·291 16).
Dhpose of spoil within the liiOOUnd·
Mnta or previously excavated area.a
(APA 1983a, p . !:-~·292 •7l.
Dt.sna:nt le nonessential structures u
soon as thev are vacated (APA 1983a, p.
E-3-:92 09).
Develop a c .. prehensive slte rehabtli·
tation plan (APA 1983a, p . £·3•292
•101.
O..vdoo an envlroneental brlefinp pro~rai: for all Held personnel (APA
1983a, p. E-3-292 u l)).
Restr!c:t public 3Ctesa during constt"UC-
tion by pt!ng the access road (APA
1983a, p. E-3·29 2 D15).
Uoe ni s l~:t~s and possibly regulotory
de:sh:nation s 11nd :-easures to discourage
us@ Ot ORVs and ,;n·s (APA 1983a , p.
E-3·292 016).
Slte and allgn facil!tles to avoid W<!t-
lands to the maxi:':u::~ exte-nt feasible
(APA 19834, p . E·l-1 91 •t8l.
Agency coordination and parttctpatton
in detalled planning of c!vl\ engineer·
lns ~easures to ain!c!ze potential ""t"
lands Impacts IAPA 1983A, p. E-3-29 2
"19).
~ini=ize habitat l oss by side borrow
tect'.niques for road con s truction, spoi.l
deposition In lcpoundcenta or depleted
botTO"ol -rea&, and CC"11S01 {dation n( rro-
jtet facllltles I APA 19834 , p. E-3-526
•2).
Fertilize md 3llov reveget:ation of
dlSLurbed sites (APA 19~3a, p. E-3·526
e)).
Mint::t :e loss of for~st areas through
ali~ent o f access roads and trannb-
s ton c:orric..lors and other oea1ures ( APA
l983a. pp. E-3-539 "23, E-3·525 •1 ,
E-3-526 •2 ).
(I) (Ill (III) (IV) (Vl I I'll
Affected Potential I"!'ICt Ongoing Proposed Proposed
Species or t~ct All~ll8ft\t and Planned !'!tm itori n& ~!t ttgatton
Croup Mechanisa Status Studies Activities ~:ea.sures
Al Botanical ()) Te"'''rary lou or al cera· !~pac t s si11ilar to (A -ll vUl '1:63,360-scale vegetation 011p· Dest~ate c~nsation hnds for habi·
Resources tion of ve~tation c~r.ities occur 1 to 1 years eaTlier; ping emphasi zinlt understof')· tat ::.ana~eeent IAPA 1983a, p . E-3-292
I cont. l due to forest clearin~ opera· effects vt 11 be greatest on shn.~b species has been coeple· -1:!).
tions In the !J:Ipoundloen' zone. fo r est vegetation t)'lM!S (LCL ted ond 1s currently bein&
1985, section 2.1). digitized (Jon. 1985 ) (APA tmplov habitat ~.ana"ement :)eAsures in
1984, FYe5 Task 8l. tri~dle buin and nn other lands to
c~nsate fo r ;.er.:sanent habitat loss
(APA :983a , p. !·1·527 •6 ).
Dev e l op EX>Ose c:s.rr::tns c3pactty oodel
to allow reilnttents to !.:~pact predtc-
t ions •nd pl annea nittsr:atton •asures
(APA 1983o, p. £·3·530 •7l.
(4) loss or alteration of ve-About 2 ,104 acr es of veseta-Monitor progress o f reb~-Develop a ca.prebenstve site r~babUi-
~tatlon due to erosion re-t ion upstream of the 'Jat.ana bllltatlon to Identify lo· t atlon p l an (APA :983a, p. £-3-292
aultln& fr011 slides, flovs, Dam site and a ... 11 acre•ae cat lens re(uiring further •10 ).
and sl~~~~pa~u alonc ~:d-I n Devil :anyon viii be sub· •ttentlon APA 1983a , p.
ment shores . ject to loss and alteration E-3-192 •ul. Designate coepensation lands for habi-
t~.rough: a ) d .. ubll l zation tat :>anas-nt 'APA 198la, p. E-3·292
of til l , b ) blowdowns, •12).
c) thawing of pe,..frost, d)
desiccation of exposed soils . Fertilize and al!~..., revegetation of
and e) change s ln drainage disturbed sites IAPA 198la , p . E-3-256
patterns. tmpac:ts m.1y occ:ur •3).
I rregularly along 70 miles of
impoundment shores. El:;plo\" habitat :-.&na&ement oeasures in
aiddle basin and on other lands to
compensate for perTJanent habltllt loss
(APA 198la, p. £-J-527 •6).
Develop noose population modf'l to allow
reilnements to rtanned mitigation me01-
sures .
(5) Oa.Nge to ve~etation :-:ear Blovdo"'TI of trees may occ:ur ~onit or progress of reba-~ir.l~t t ze faciltn· dlmen s tcns (APA
cleared a r eas and along !.:~-near cleared 11reas and a long bllltatlon to ldentlfv lo· 19!3a, p. E·J -291 u t ).
poundment shores froo wi :-:d and impoundment s hores, 111 in 1 y a f -catlCins requiring fu rther
dust. fectlng black spruco stands. attention (APA 198Ja, p. Consolldato st ructures CAPA 1983.,, P•
\t:lr.d·blown dust may aifect ve-E-3-:'0 '.! ntl). E·l-191 •2).
getation through al teration of
s nO'IW'lt regimes and c:han&es !1in1=ize voluee :-equirements !or borrow
In the chemlc•l composition of extract ion (APA :oP3•, p. E-3·291 d6 l.
solls.
Dtsp c~e of spol i. \:ithin the i.t'lpound·
ments of previous lv excnv~tcec1 .uena
CAPA 1983a, p. E-j-292 •7 ).
~ve l op .1 COtllprthe !'!s lve s t o:_e r eh.1blll·
totlon plan CAPA i 98 3.1. p. £-3-192
•10).
fert!l lzt and .1li.ov reve gec.uton of
disturbed sites 'A?A 19~)•, p . E-3·526
•3l.
EJ:n,l c\' measures r<" control
IAPA 198Ja, p. E-J-~11).
r oad dust
p._., ..
(1) (ll) (Ill) (IV) (V) (\'1)
Affected Potential ~t Onto ina Proposed Proposed
SpKteo or ~t A&HS-."It and Pbnned !'.on!torlnl ~!t i gation
Croup --~-Statua Stud lea Actlvltl•• ~~e asures
(A) Botanical (6) Daup and alteration of Dust I.IIJiacts will occur within !lonitor pr oarou of reha· Sltt f acUlties In areu of low b!oeau
Re1ources veptation alon& the ace••• a !ev hundred yarda of a road; billtation to l dentlfv to· CAP., :98la, p. E·3·291 e )).
(cont. l roada duo to dust de!>oolt !on, zones of blocked or altered cat ions rer,:trl n, funher
erotton, leechtq of nutrltnts d ralnap aay ext~ to a aile attention APA 198la, p. Site !acU !ties ': c!n!ahe clear !na of
In drained areu, .,.ter·l oa· froa a road. E·3·292 •nl. -.~nation tyt>el ;>roduct lve u wtldl !fe
line In areu o i blocked
I
hab!tot c...,onent s (APA 198la, p. E·3· I
dralna1e, and thavin& of ad· 291 u S).
j acont perNfrost.
DevelOJIIellt of a coaprollenalve sltt re·l
ltab!l!tat!on p lan (APA 1983a, p. E·3·
292 u\0).
Desi!;!latl on of cor.p ensatlon l ands for
!mp l .,.,ntatl on o i habitat manaaet~ent
meas ~:res (APA 198 3a, p. E·3·292 tl2l.
Sit l~g and allan=ent of facilities to
avoi~ wetland• to the ux.tat. extent
feas ible (APA 19!la, p. E·3·292 tl8 ),
Aaer.c;· coordination ond parti cipation
in detailed plmni~l nf civil er.gineer·
ina =eaauru t o cin!alze potential wet·
lands !llpacu (A PA 198la, p . E·3· 292
•191.
Habitat loaa wil l be 11!n!mized by s ide
borrco" t echniques for road con1truc·
t ion , spoil deposit ion i n !npoundments
or dep let ed borrow areal, and c:onso li •
dat:on o r proj ect !ac!lltieo (APA
196ja, p . [•3•526 n2).
Fert!!!utlon and ro veputl on o f dis·
turbed lites (APA 198la, p . E·3·S26 I •3).
I
Hab i tat mana~er:t ~••urea in &iddle
blain and on o ther h .nds to Cl'lm'()ens.n e
for ;:ermanent ltobltat loss (APA 19833,
p. ~-l·S 27 •6).
( 1) Alteration of ao!l s urface !:p1ct not quantified. Chan· Expe cted lcpoct sever ity not ~.on!tor pro,ress of reha-~!n !::i ze f3c!l!t'" dicenslons (APA
albedo in cleared areas ~y &es i n 11 ~o c an produce sufficient to re-quire stud!-·· btl l t2tion to !de.nttfy to-1983a . p. E·3·!91 nll.
affect -tation. chan,es in surfac.e hydrol~, cations re(u tri n~ further
a ff~ctins the type of ve~ta-attention APA ~98la, p. Cons olidat ~ structures CAPA l q8)a , P·
ticn that bec.-es establ hhed E·3·192 •lll. £·3·:~1 c•3l.
(APA 1'18la, p. E·l·227l.
Site :acUities ~o ~iniclz~ clearlnK of
vtt~etati on types ;>roduc t l ve as vi ldlHe
lt ab!tot c011ponents 'APA 1983n , p. £·3·
2q1 u S ).
Deve lop a coepreher.s ive s ite rehablll ...
tat!on p l3n (APA :98 33 , p . £·3·192
•101 .
.... s
(I) (11) (III) (IV) (V) 1\'t)
Affected Potetial l..,.ct Onpina ... .,.,Md Proposed
Species 01' X.,..t ...... _t ....S Plennecl !lonitortna !!lt!gation
Croup -i-Stat,.. Studies Actl•ities ~sures
(A) lotuic:al (8) Increued inddec:e of Elqlected t.pact Hwrity not ~t clurln& vUl not belrln un·
~-rces diseaM 01' inHCt infasuttons IUfficient to require study. til ~ or l years before flllin11 pat·
(cont .) d1M to clurtna acthittes . c:ll .. o i waetatton vtll be left W~til
just before flll ir.a I APA 198la, p.
E·l·HS •1).
Clear l =po-..:s p rior to flood i na
and r...,ve floatl ~i debris to reduce
na.:ards to c r o1s i r.g fAPA 198la, p.
£-]·)~0 .,).
Burn s lash plies to minimize effects of
insects and dlleue (APA 198la , p.
E-l -:71 and S09).
( 9) Incre&M<I rhlt of fire A qu.ntitative prediction of !lonitorint viii include Devel op an anvircmoental brieflna• pro·
lr• lncnaHCI liuun ac:clvt -the ut...,t of lnpact vtll not attention to potential ara !o r all fie!~ personnel (APA
tie• aDd euler ac.c .. a. be undertaken . fire haurda. 198loa, p. E·l-292 •lll .
Develop a COIIIprehensive site rehabill·
tat l on pl., (APA :98la, p. E·l-292
•• 10).
~strict public acceaa durtna construe:·
tion ~y ptinc :he acceu road ( APA
198la, p. £-3-292 •15).
Uae of siena and rosalbly reculatory
desianationa and =easurea to discour ...
UH oi ORVs and .U'\"s (APA 198la, p .
E·l-~92 •16).
Phased iapl..,tati on o f the project
Recreation Plan •"1 t h interagency review
and concurrence 'i.PA 198la, p . E-l -29 2
#17).
Prohibit public acce ss to !Dmedllte
proj e ct area durlrc constTUCtion !APA
19833, p. E·J-5)l. n14 l.
(10) Alteration o f veaetat ion !J:oact not quantified but not Ex pected !Japact Hveri t y not No c iti got i on •proars to be feo a i b l t.
d .. to Uoodln1 alona lcpound· expected to be a a lpiflc:ant s ufficient t o nqulre s tudy .
...,t ahorea and delta foru· l oss; •~ alteration o f vep-
t ton where crHiu enter tile utton types vU I occur.
~ts .
(11 ) Alteration of ""ljtat ion lcpact not yet qu.nt l fled . Oovns t re.a vegetat i on l tudtes ~ttor c.hanse• !n dcwn ... Deve lop -.se J>Ot'Uiatlon IIOdel to allov
succeaalonal fattema n 3own -conducted ln s..-r 1984; in· 1treaa vent a ti \·• cover reH:o:eDtnt l t f' r1t!~ation Jne&IUHI (APA
at re• fiOOdJja tna Chii t o .tow pact an:l yst a currently ln (APA 198la , p . E-l-523 198la, p. E·l -~:? •7).
rq:ulat ion reiiUl tarn c hitl "' pro~fesa (APA 198 4b, FY85 Task -zl. fE!-[n nre • m!i!!ol~· ana 15). De s i plate compen sation lanc!s for habl -
u Kourln1 eUecta. tat ::anac-nt !.\PA l98la, p . E-3-292
U 2l.
Papfi
(1) (ll) (111) (IV) (V) l VI)
Affected Potftltbl IlapKt Oni!Olns PropoMd Proposed
SpKIU or I..,.ct Aases-.nt and Plmned Honltorin~ ~tt!Ra t ion
Croup IIKlumlsa Statu Studies Ac t!Yitlu ~.e.asures
(A) Botanical (12) Alter ation of ftJt!tU!on Ef!ec.ts uy extend 2 ailu lllpllCt -~-vlll be ad · No spKiflc ... ttortns ac· Use o f ~ltUevel lnt.ake s tructures on
le.sources c-ltleo clue to cllut!c frca the reservoirs and would dressed and clorl fled throul!l> t!Yities a re planned . the ~ma to ut.ntair: downst reaa river
I cont.) chanps near the reservoirs. be aost noticeable alona the l..,.ct uns-.t refi_,t tet!l1l:eraturu u close to not'llla l 31
s out.h shores. Probabl y Utftlt (APA 1984b, FY Iuk 5). poss i ble (APA 19Bla, p. E·l -526 •5).
of ef feces on vesetat ion haJJ
not been quantified.
(ll) Dau1e to W1derstory ve-!~:~pact not quantified , but Impact noechaniA will be ad· !'1onltor chanps I n dCMI· ~lt i gat lon not er.pec ted to be required;
getation fr .. rl..e Ice and rl"" Ieins wll 1 be limited to dresaed and elarlfhd throul!l> s treAID veptative cover probably not feasible in any case .
hoar f r oat depoaltlon caus ed the t.IDMd iate area around the lmpact aase•..ent reflne~~ent (APA 198la, p. E-3·523
by paralotent fog banks near spl\lwaya. Hoar frost ls ex-(APA 1984 , FY85 Iuk 5). •2 ).
the reeervoir s and open·vater pe:cted near open water but is
reachea dovnat re•. not expected to be an !Jipor•
unt negative l oopact .
(U) lncreaae I n d-se and l"l'act not quantified . Monitor proarus of reha· Develop a c.-preher.slve s ite rehab Ill·
alteration of ftlt!tation c011· bUitatlon to Identify lo· tat lon plan (APA :98Ja, p. E·l-~92
...,ltiea due to increase In cati ons r{:irln& further •10).
uae of off·road vehicles r.ear attention APA 198Ja, p.
project facilitleo . E·J -~92 •ul. Dev~lcp an ~nvtr~ntal brie£in1JS pro·
gr .t:> :or all Holt personnel (APA
1983a, p . E·J·!92 nlJ).
Restrict public access durin~ cons true-
tion by pting t~e access !'Dad ( APA
l~eJa, p. E-3-292 •15 ).
Use o f signs and pos s ib l y ngu\atol")'
designations and =easures to dtscouu gf"
use of ORVs and A.l\"s (APA 1983a, p .
E·3·29~ •16).
Ph•sec lmplementatlcn of the project
Recreation Plan .,.ith lnter.1aency revi ew
and oon currence (APA 198Ja , p. E·J-292
•1 7 ).
Proh i bi t public access t o l.mmedla t e
pro j ect Area duri:'\§ construct i on t APA
1983•. p. E·J·53lo nl4l.
(U) R..,al of overstory ve· ••111 affect abou t 6,017 acres Deli;:n t ransatss l:m corridors to allow
setatlon In foreated portions 1:,557 froe Heal y to Fo!r· selective cutttn~ o f t rees and to ac-
of the u·an•tsaton corridors. banks, l,<.Oto from Healy to ccm:c ~ate uncleared lov shrub a nd tun-
'.o:t llov, 1,~74 f r 011 Wlllov to dra \"f:§et3tl on wit~l n rights-o f'-wav
Cook Inlet, 46 fr011 l:atana to (APA :98Ja, p . E-3·292 *8).
D•v !l Canyon, and 462 fr ..
Devil Ca nyon t o Gold Creek l of Ecp lc·: selectl •:e c!~arinR tn t r3nn.h-
h.abt t ats contatni nK trees, sior. conidors. ;:-en:it tinQ: s e r11 l vege-
-;troductns an increase tn tat i ~ up to t O ": !n he i ~t (APA
shrub-type ve s•t~tlon. ' 198l•. p. E·l·Slt o.41 .
!
(16) &lockaae of aedlolent l npac t not qu-.ntifted. · Oownstreae t.mpa c:t assessment Collect data on chnnges t n ~f th:at t on not ff"3sib le .
tran~rt __ o_y tne lapou:ndments Is currentl y I n pro~rua (APA downstrea• vP.getattve c o,·· ... ncrea1e e ro1 on own· 1984b , FY8S !3sk 15). e r (APA 198la, p. E·3·S23
atre .. 1 aUecrlns ve~ation t2l.
on hlana. [n die n J!r.:lln .
(1)
Affected
Specho or
CToup
(A) lotaniCJol
leaourc:ea
(cont.)
18) !Coole
(11)
Potontlal
101p8Ct
llecNnl•
(17) Potontlal ....,..al or al·
teratlon of llabltata for en·
danpred pl.,t speclu.
(18) Luchtna of potontlally
toxic heavy Mtall, ouch as
•rcury, fro. flooded soli s
and veptat ion into the reser-
voir ~t.
(1) Clearln1 of veaetatlon In
e t are• re-
dUCe v nter C.4rYV ns capac tv
prlor to tlOOCiln&.
(llll
IO!p8Ct
..... ~t
StotUI
101p8Ct not quant lf led . llo
enclanpr.cl specleo """ been
found In surveyo to date.
I~t not quantlfled. ~y
affect prtaarlly pr.clatory
fish, raptors, and carnivorous
.-ala.
Clearins vlll r.cluce winte r
carryin& capacity of the tm·
pouncllllent zone 2·3 years prior
to fllltns (APA 198la, p. E·
3·398, Table £.3 .145; LCL
1985, p . 2 .2·8\.
(IV)
Onsolna
-Planned
Stud leo
I
Prev!OUJ otlldleo prOYided tuf·
flclont lnfonutlon for !Jipact
a11e118ent . llo further stud·
, ••• planned.
A literature seuch -analy ·
s is of the potential for
leacbtns fro. soils -ftp•
tatlon Into tapoun~u II In
prosreu ( Aquatlc f"t85 Task
51).
lteftne.Dt of popuhtlon (APA
1984b, f"t85 Talk 16) and car·
rytns capacity (APA 1984b,
f"t85 Talk 11) -ell to better
estiute illpac.ta on eooae and
deteraine acreage of habitat
coapensation is being conduc-
t.cl.
(V)
I'Toposecl
llonltorln&
Activit leo
llo I:IOftltortna planned; en·
danpr.cl species not known
to occur in pTOject area.
-for I:IOftltortna vtll
be deteratned. based on
ilrpact uaessc.ent.
Monitor brovse production
on landa enhanced for
8001e brovoe (APA 198:la,
p . £·3·525 t lll.
Pap 7
(\'1)
Propos.cl
Mlti&at ion
~.eaaurea
Stu f acilities to •tntalu clearl ns of
less abundent ve£etatlon typeo (APA
1983a, p. [·3·291 "").
Oesi~~t tran•taston corrtdors to allow
selecttv• cuttina of trees and to K·
c-.late undlstcrbed lov sllrub ana
tunclro veptatlon vltbln rll!hts·of·Wiy
(APA 1~8:la, p . £·3·292 •8).
Use of slsna and possibly re~~alatory
desianattono end ""a1ures to dtocouratt
use of !JtVs and Al\"1 (APA 19833 , p .
t-3-292 •16).
!1ltl1at1ve .... uru not phnn.cl at tbll
t iM.
lllpOUn-nt clearins will not besln un·
tU ~ or 3 years before fllllna; pat·
ches of veaetatlon vlll be left until
just tefore fll l!nw IAPA 198:la, p .
E·3-~2S •1).
Desil'fta te ca.pensation lands for habl·
tat anapment measures (APA 198la, p.
E-3·292 •121.
Employ habitat managetl'lPtlt Deasures tn
middl e basin and on other lands to c~
pen sote for penr.ar.ent habt tat loss (APA
1983a, p. E-3·527 "6).
Page 8
(1) (11) (Ill) (IV) (VI (\'I)
Affected Potential l"'l'act Ongoing Proposed Proposed
Speciea or lll!'act Aaaesaent and Planned 11onitorins ~ltiga.tion
Group !lechani• Stat.a Studies Activities ~easures
(Bl !'looee (2) Penanent habitat lou due Kabitat·based assess llleftt is in • Reflne~~ent of population Monitor brovae product ion Impoundment clearing will not begin un·
(cont .) to the ~ffttt s and other prosress; re f'ine.ent of IROOie (A PA 19841>, FY85 Taak 16) and on Ianda enhanced for til 2 or 3 years before filling; pat·
eerunent ac ties . carrying capacity -el will carrying capacity (APA 1984b, 10001e brovae (APA 198le, ches of vep:tation vill be left until
quantify estluted impact us· FY85 Task ll) -el• to better p. E-3·525 4'lll. just before filling (APA 198le, E-3-
nitude (APA 198 3a , pp. E·31ol2 eattaate iapacts on 80oae and 525 nl).
to 414 ; LCL 1985, p . 2.2·8). detel'lline acreage of habitat
c.-pensation ia beins conduc-Selective clearinSJ in trans•tsston cor-
ted and planned, 1:63,360 ridor, peraittin~ seral vegetation to
s cale veaetatton uppt.na and grow up to 10 ft in height (APA 1983~,
digitizing O"'!'haaizing under-p. £-3-526 •4).
atory 10001e forage ia current-
ly underway and is seheduled transnisston corridors will provide al -
for COII!Iletion in Jan.ary 1985 most i8 ,l00 acres of vinter habitat of
(A PA 1984, FY85 Task 8), A r easonable quallty (APA 1983a , p . E-l-
brovae inventory (APA 1984b , 528 , Tabl e E.3 .:~5l.
FY85 Task ll) planned for
FY85·86 wil I support the on· Habitat enhance.cent meaeurea in middle
going carrying capacity model basin and on replacement lands to cc:a-
devel~t . I dentification pensate f or perr..anent habitat loss (APA
a nd asaeeaMnt of candidate 1983a, p . £·3·527 ll6).
compensation lands 11 underway
(A PA 1984~, FY85 Iaak 12), Ac ~uisltion of rep laceeent lands f or
Field studies of down stream lmplecentation of habi tat enbanc ...... nt
disturbed areas are planned 110asures (APA 1983a, p. £•3•292 -12).
(APA 1984b, FY85 Task 14).
Continued IIIOftitoring of 1100se
habitat use and winter snow
severity (APA 1984b, FY85 Task
10) are underway.
Impac t s will be further ad-
dressed through icpact assess-
ment refinement (APA 1984,
FY85 Task 5l.
I
I
(1) (11) (III) (IV) (V) (\'tl
Aff•cted Potential !~~pact Ongoing Proposed P~oposed
Specie• or Ioopac:t A.sless.ent and Planned Monitoring Mit!~ation
Group !lech•i .. Statue Studiea Activities !-!easures
(B) Hoose * (3) Pel'llallent lo10 and at· • Borrow areas and vavel * Refin-nt of population ~nitor brows~ production Minimize habitat l oss by side borrow
(cont.) teratlon ot IIOOH habitat witt bema for road• and railroad (APA 1'184b, FY85 Task 16) and on l ands enhance<! for techniques f or road cons truction, s poil
occur aa a result ol .:cess vi 11 rettOVe about 1, 100 acres carryins capacity (APA 1984b, 10001e browse I APA 198X., deposition In !r.lpoundlllents or depleted
road and railroad con-ldor (447 hal of vei!f!tation. Di· FY85 taak 11) -els to esti • p . £·3·525 •lll. borrow areas, :met consolidation of
constructlon1 maintenance. and rect loss of forap may be re· •te tapacts on 110ose and project facilities (APA l983a, p.
~· latively small, but effective deteralne acreace required for £·3·526 h 2).
toss may be sreater If diltur· habitat coepensation is being
bance results in avoidance conducted. 1:63,360-scale Fertilize and all c1.1 reve~r;et~tion of
(LGL 1985, p. 2.2·9). vei!f!tat!on upping and dig!· disturbed sites f A?A l 9 83a, p. £·3·526
tizinl to include ac:ce•• A3).
corridors and emphasizing
underatory moose forage is Employ habit:lt r.:anaiJement r.teasures i n
currently under way and is middle basin and on other lands to com·
scheduled for coepletion in I pen•ate for per.::anent habitat toss (APA
Janua~ 1985 (APA 1984b, FY65 l98Ja, p. £•3•527 n6).
Task 8 • A browse inventory
(APA 1984b, FY85 Task 13) I Incorporate changes to design and
planned for FY85·86 wilt s up· alignment of access road to reduce
port the ongoing carrying Impacts on 1000se (APA l983a, p. £·3·533
capacity -•1 developooent. •lll.
Identification and 3saessment
of candidate compensacion Minimi ze loss of f oresr a reas through
lands is under way (APA 1984b, a l ignoent of access road and tra nsmts·
FY85 Task 12). s ion corridors, and o ther measures ( APA
I111pacts wi 11 be further ad·
t983a, pp . £-3·539 •n, 525 •1 to 526
•2).
dressed through impact aaaess·
ment refineme nt (APA 1984b, ~lnirt:tze loss ar.d alteration o f habt·
FY85 Task 5). tat , particulart;· less abundant hab!·
tats and sen s iti·:e wildlife hobitats
(APA l983a , pp. E-3·291, 292 -1·11).
Dest~nate lands fer habit at management
measures (AP A 1983a, p. E-3·292 •12).
Avoid the Prairie Creek , Stephan lake,
Fog L1kes • a nd !r.dtan River a reaa by
3ccess r outing f A ?.!. lqe:-a, p . E-3-292
:1 \l..' 0
Dest2n and a li~ :'C3ds o1nd r3! I road to
mtr.i:r:i z:e impac ts on \oMt ands !APA
1983a , p. E-3-292: r:l8, 9 ).
" ( 4) Illpeded drainage caused • Altered surface water drain-* IllpaCt severity no t suff!· ~tni r.ize loss o: :oren areAs throutr.h
by a ccess road and r a i t r o ad age will cause very localized cient to require s tudy . alignttent Of AC CPSS rOl l o1nd transmis -
bema mav alte r moose hat::~t:at r:IOOSe habitat alteration. s ion ..:o rridor, ~::.d oth• a:easures (APA
as a resUlt of ftoodin~ of There i s equa l likelihood tha t l983a, p . £·3·539 "2 3, _25 c l to 526
forest or shrub land areas . either higher or tower quality ••2 ).
habitats witt result. ~o net
ic:portant impact 11 antic!pat· OestRn and aU ~n r oads and railroad to
ed (LGL 198S, p. 2.:-9). minio ize impacts nn t.."t tlands lAP A
1983:., p . E-3-29: ro l S. 19) o
'
(1)
Affected
Species or
Croup
(B) !loose
(cont .)
(It)
Potential
loopac t
llechanln
( S) TH~p<>rary loos of vinter
habitat vlll occur on bor rov
sites.
• (6) Habitat quality -y tt!JII•
porart ly decrease near the re·
aervotr aarsins as • result of
loc:allv hil!h densities o f
1100ae dtaperalng from l.l:pound·
eel areaa.
• (7) Accidental fires rosult·
tng from huaan acti vities may
temporarily degrade some moose
habit at.
• (8) Loss of coose habitat
due tc erosion of f.l:lpmmdl:lent
s hore lines vi 11 continue fo l -
lov!ng flooding.
(111)
loopact
AaaeaiMnt
Statua
• Winter habitat for an uti·
uted 37 11001e vill be affec·
ted baaed on pre llllinary car·
rytn~ capacit)· data. Reveae·
tat!on Is likely to restore
these areas aa eooae habitat
~:!th in 2-~0 years follovtna
disturbance (APA l983a, Table
E.3.14S; LCL 198S, p . 2.2·9).
• Huvter browsing of shrubs
srowtna near the resef"\•otr
aarstna vi 11 occur as winter-
ing coose congregate. Over·
brovs!ng of the shrubs !s not
considered l.mportant because
of the lov densities of
shrubs. Habitat ~uality vill
not be subatantially reduced
below the current low levels
(LCL 198S, p. 2.2·9).
* F1res may degrade some moose
habitat over the short term,
but regenerated vegetation on
burns will provide productive
coose habitat several years
later (APA 1983a, p. E-3·398,
!3ble E.3.14S; LCL 198S , p .
:.:-10).
• Er osion resulting from
•lidu and flovs wil l be con·
fined to the lei!Dediate shore-
lines, Were colonization of
disturbed soils by plants ben·
•flc!al to 1r.00se could s upply
Corace that wlll offset any
adverse impact with a net ben·
eficial !llpact (LCL 198S, p.
2.2·10);
(IV)
Onsoins
and Planned
Studieo
Reft,_.,t of population (APA
1984b, FY8S Taolt 161 and car·
rylng capacity I APA 1984b,
FY85 Taolt ll) -Is to Uti·
:ute Urpacts on .-oos e and
deten:tine ac.rea~e requirement•
for habitat co.pensation is
being conducted.
• Reflneeent of population
(APA 1984b, FY8S Task 16) and
carrying capc1ty (APA 1984b,
FY85 task U) models to est1·
aate impacts on moose and
detenDi ne acreage requirements
for habitat ca~~pensatton is
being conducted .
A literature review of habitat
enhancement t echniques has
been conducted. Field studies
o f downstream disturbed areas
are planned lAP A 1984b, FY85
task 14).
• Previous studies provided
sufficient t.nfomation for t ::~
pact assessment. ,;o further
studies are planned.
(V)
Proposed
Honitorinl
Activities
Monitor brovse ~roduction
on l ands oanaaed for eoose
brovse I APA ~9B•, p. E·
l·S:S nU).
~.oni tor browse product ion
on lands canaged for moose
brovse (APA 1983a, p.
E·3·S2S u U).
.. ,. 10
(\'t)
Proposed
Mit!gati on
·:easurea
* Habitat loss wU 1 be l:linimtzed by de·
post tin~ spot 1 ~n i=pound~nts o r de·
pleted borrow Areas, and consolldat Lon
oi p r oject fact Et!es (APA 19A3a, p.
E·3·S26 •2l.
Fertilize 01nd .1l:ow r eveqetation of
disturbed sites 1 APA l983a , p. E-3·5:6
•3).
Eaploy habitat ::ana~aent aeasures in
a tddle b11tn and en other l 1nds to com-
pensate for perr.anent habitat loll (APA
~983a, p. E·3·S27 n6l.
Designate lands :or habitat 11111\ag..,.nt
•asures (APA 1933a , p. E-3-:92 •l2l.
Desl!"' and align reads and railroad to
•tnilllize impacts on wetlands CAPA
1963a, p. E·l -292 •18, 19).
Impoundaent clearing will not begin un·
til 2 or 3 y ears before !1lltng; pat·
ches of vegetat!co will be l eft until
just before fillin g CAPA 1963~. l'·
E·3·52S •ll.
Employ habitat :--..ar.age~~ent oeasures in
middle bas i n and o n other lands to
cocapensate for per:'11 nenc habtt.1t loss
(APA 1983a, p. ~-3 ·527 6 6).
Oesi~ate lands :or h nbltnt mana~ement
meas ures CAr A lC:~!.J. p. E-3-292 ''1.2).
Prohibit public :.:s e: of access road and
airfield ~u rin~t co:'\struction lAPA
1983•. p. E-3·51~ "12, 14 l.
Oevelcp .1n envtr~::;.ental briefin5tS
pr o~rnm for nil :l•l d personnel (APA
198la, p, E-l-29::! ul)),
Emplov h.1blt.1t :-ar.1cement oea sur e s in
mi ddle bas t n and on o the r lands to com·
pensatc !or pen:aner.t h OJbit.J t loss (APA
1983.1 , p. E -l ·S~:" ul 1, lt.).
Desi~ate lands :or habitat c:lna~tetc.ent
~neasures (APA 19Sla, p. E·l·292 •l2l.
(l)
Affected
Spe<:iao or
Croup
(Ill Moose
(cont.)
(tl)
Potet~tlol
t.pect
Hechanl ..
* (9) Habitat ~Ht'f for
110011e vii~ ~rove alon! the tranml•• on ne corrl or be·
cause veptatlon viii se ma in·
tolnid in earlv succeeaional
staaes .
* (10) Alteration of 11001e ha·
bltat dovnatrea of Devil l:An·
von viii occur due to altered
seasonal and annual flow re·
atits of the Suaitna RiveT.
* (11) l.oc:al clialtlc char.ges
resulttna rr .. the t.pound·
Hnts lncludlns lncrused S\111"
•r rainfall , increased winds,
cooler ~r teeperaturea,
increaa~ early winter snov·
fall, hoar frost depos it ion on
vegetation tn winter, delayed
spring plant 'henology, and
chanaes in plant species com-
position may reduce habitat
carrying capacity for .,oose.
(Ill)
t..,..t
AII4!SS'IIent
Status
* About 41,~21 acru 116,810
ha) of foru~ed vegetation
w111 be cteored. Regrowth
w111 be penoltted to a ttain a
... tmum hellht of 10 ft () •l
before rec:leartns . this re·
pres•nts a baneflcia1 Impact
for moose populations vinter-
lns •Ions the trans•lsslon
llr.e corridor (I.CL 198~, p.
2.2·10).
• Decreased •~r flows, and
decreased frequency and sever ·
ley of s.-r floods. wn l
promote ~croachment of plo·
neerlns veputlon (e.s . wU·
lows). Hawver, in the ab·
sence of frequent disturbance
all succeuional stases of
veaetat ton vi 11 advance'
r~sulting in habitat values
declinlns over tliiM! (LCL 198~,
pp . 2 .2-10-lll.
• The l.ltpounnents wlll IIOder·
ate local seasonal tempera-
tures. Effecu vlll be toea·
llzed around the upoun-nts.
with the NXt.u. effect at the
prevallins windward shoreline.
Slight, but 1-aourablo pre·
cipttation increases of s uaner
rainfall and early winter
snowfall t:~aV occur . Hoar
f rost depositon may form on
vegetation near the impound ·
ment .. r glns prior to lee for ·
mation on the reservoir s ur-
h.ce, but ceaaurab le increases
above pr e-project con ditions
would be negligible . Cooler
s pring teeperatures .. y delay
phenoloslcal developooent.
St10erous other local f actors
cOilbine to aake changes in
ph~ology difficult to attri·
bute to cliaate alterations.
Other project·lnduced factors
oay posltl\·ety influence earl y
plant developMnt. Clilutlc
changes are not expected to
measureabl y reduce habitat
CArrying C3pacity f or moo~e
(J.CL 1985, pp . 2.2-11-1 2).
(IV)
On~tolns
and Planned
Studl•s
A literature rnlew of habitat
enh ance~~~ent techniques hu
been co"'Pleted . Fleld studies
of disturbed areas are planned
(APA 1984b , FY8~ Task 14) •
Reflnr.oent o f down s tre.., vege·
tation lcpact •ueasment to
better assess effects on moose
habitat .. u I continue (APA
l984b, FYB~ T~sks ~. 15, 23).
• Prev i c us scud tu provided
s uffic le~t !nfonsat lon for
tapact .a:ssess~~enc. No further
stud i es are planned.
(V)
Proposed
!tonitcrina
Actlvlttu
Col lect dat~:~ C1"' change.s !r
downstre.• veset&t!ve cov·
er (APA 1983a, •· £·3·
523 *2l.
(VI)
Proposed
~ltl Fatlon
~.easures
Pap u
Select!. ·e clearing tn transmi ssion cor·
rider, lH!nDitti!'lg seral vegetation to
grow up to 10 ft i n height 'APA 19 83a,
p. £-3-526 .U.).
U~ of multilevel intake structures on
the dau t o .. i ntdn downstrea river
tecperature.s as close t o nor11al as pes·
slble (APA 1983a, p. E·3·526 *5l.
Hab i tat enhancel:'ent meas ures in middle
basin and on rep lacement l an ds to com·
pensate for per.:-.anent habitat lou (APA
1983a , p. £·3·527 f 6).
(t)
Affected
Specie• or
Croup
(!) !loose
(coat. l
(It)
Potential
lmp.ct
!lechanlsa
• ( 12) Open .nd var.er vater
in downstre• are•• may .alter
pbnt phenol"'Y and affect
spring foralt and cover !or
IIOOSt.
Ill) Vegetatlcm Icing (hoar
frost) downstream mav render
a~ b rowse unavailable, and
•t•boltc deaands of 11001e m.ay
increase as a result.
(14) Drlftlna snow fr011 the
frozen i.l!l'poundaent surface aay
preclude use of a narrow ~and
of winter browse along t he
impoundment shore,
(lS) Drifting snow In the
transmission line corrtC:or ma.,·
p reclude use of winter browse:
(ttl)
Iap.ct
Aaseasaent
Status
* Open and warDer vater in
early sprint would ser\·e both
to retard river ice develop-
r.ent in l.1te vtncer and to
r.-elt eY.isting river tee
faster. Both would tend to
prnmote early, rather than
! .1te, deve l opeent of vegeta·
•lon (l.GL 1985, p. ~.~·!2l.
• Open water may be pre~ent
down to about Gold Creek .... ith
bo th dams tn operation. Al·
thou~ accumulat ton cf hoar
frost may ruke some b rowse
unavailable, it is unlike1~
that this vi 11 occur because
of the relatively narr<N lead
of open vater . ~se are not
knC'IWn to .avoid eating browse
wt th hoar frost. at tacheC.
Hoar !rost accumuLates on ve-
!Jet.at ion under current condi-
tions and is not 11keh• to
appreciauly increase aS .1 re-
sult of the project CLCL \98S,
p. 2.~·12).
• :'he lr'&gnitude of the effects
of s now drifting fret: the fro·
zen lmpoundcents v! 11 depend
on s everal f actors. Any snow
accumulations that occur are
-*Xpected nn the south and west
~horellne s. ~o st of the
drifting snow will be inter·
cepted by the decreastng re-
servoir levels and the result ·
!.n R ice shelves and cracks
I thlt are formed. It !s un-
like ly that s u !Hctent quanti·
ties of snMI will accuoulate
a l ontt impoundcen t shore 1 tnes
to res trict Mvements .;,f moose
o r cover brows~~: that m.av be
growing there (LGL J08 5; pp.
~.:·12 ·13 ).
• Ve getation vUl be pe rmitted
to reach 10 f• In hel0ht be·
fore re-c l earin'-the t ransmis-
sion corrtdor. · !-!~intenAnce oi
thi5 dense shrub growth will
Intercept blowing snow O.r.L
1985, p. ~-~·lll .
(IV)
Ongoln1
and Planned
Studios
!epacc severity not sufficient
to reoutre study.
• tcpact se-verit\· r.ot s u£!1·
cient to reQuire. s t udy.
• l11pact severity not s u ffi-
cient to require study.
• I~tp.a.ct s evPrity r.ot suf!t -
cient t o re1u1re s tudy.
(\")
Propcsed
~ltorlng
Actlvltlel
(\"l)
Propos~d
~tt!SJ3tion
·~easures
Pop 12
I t:se of !!:Ultile\·e l ~:'!:take structures on
the dms to aai~t.tin do ... Tistrea• river
tcesperaturf's as c ! ose to r;on&.~l as pos-
1 slble (APA 1983a, ?· E-3·526 •5l.
t.:sc of I!I'Ulttl e •:el :~tJ.~E: structures ('n
the dams t o ~.air.:.air. c!c'l.mstreao river
teeper.atures as c!~sP. t J r.onnAl as ?os-
slble IAPA 1983a, p. £·3-526 "5\.
Select!ve clear:::: !n ::~e trJ.n scissi~~n
corridor, ~r=-.itt:::s:. s~!".l 1 ve~e t 3t~:-r.
to ~rC'\oo' t:p to :o :": i r. ~ei~ht '"P·'
198 3a, p. f ·3·o ~~ ·~>.
~!i ntmt ze lo~~ <'f fore~r Jreas t hrout:h
ollignr.~ent "f accl!ss ro.1l! and tr:Jnsr.~ts
s ion corridor, .1:-.d ... ~rher :!:ensures ( APA
lfHi33, p. E·3 -;lo ,.!3l.
Pa~ 13
(1) (It) (III) (tV) (V) (Vt)
Affect@<! Potential lllpact Onsotns Propos@<! Propos@<!
Speciu or lllp8Ct As sea-t and Plann@d Monitoring Mitigation
Croup Mechant .. Status Studies Activities ~easures
(11) Moose (16) Delay@<! •lUng of snow • Ibis t..hct is not expectl!d • t11pact severt ty not suffl-
(cont.) drifts ln a narrow band along to occur LCL 1985, p. 2.2-13) cient to require study.
both impoundllent shore lines (see also t~~pacts B-ll• and
and the transaisslon corridor B-15).
uy reduce availability cf
spring forap.
( 17) Snow drifts .. y i•pede • Ibis t..pact is not expected * Impact severity not suffl-I
movements south and southwest to occur. The value of the ctent to require study. I of the reservoir and reduce Fog Lakes area will be unaf-
the value of the Fog Lakes fected by drifttn~ snow (LCL
area as winter nnp. 1985, p. 2.2-13) see also
Impact B-14).
(18) Open water and/or ice Sollll! moose mav not cross the * Previous studies provided Collect records of 1m-Clearing of impoundments prior to
shelving ln the f.llpoundllents tmpoundllent di.e to lee block-sufficient information for poundment crossings and flooding and removal <lf !loatlng debris
may block access to tradt-age and visual barrier ef-impact asessment. No further impoundiiM!nt-caused mortal-to reduce hazards to crossing (APA
tional calving and wintl!ring fects. Moose wi 11 probab 1 y studil!s are planned. ity during open-water pe-1983a, p. E-3-530 "9).
areas. alter seasonal movements and riod CAPA 1983a , p . E-3-
crossings to maximize use of 524 ol14).
surrounding browse and forage
supplies (APA 1983a, pp. E-3-
40'1-410; LCL 1'185, p. 2.2-13).
(19) Open water dovnstrem may * Moose are unlikely to cross • Previous studies provided Use of multileve l Intake structures on
restrict movements across the open water in winter I most sufficient information for the dams to maintain downstream rivH
river and to island wintering crossings were from May to impact assessment. No further temperatures as close to normal as pos-
areas, and attempted crossings November [APA 1983a, p. E-3-studies are planned. Sible (APA 1983a, p. E-3-526 A5).
of open river areas in winter 4101). Open water leads occur
may lead to .,rtality. under current conditiOI's along
most of the Suaitna River dur-
ing the winter, which effec-
tlvely functions to H mit many
river crossings (LCL 1985, p.
2.2-14).
(20) Disl!lacl!lllent of moose * Decreases in numbers or pro-~.oc>se calf mortaHty study Collect lnfon:atlon on
durtnf reservoir ltlltns -:ears ductl vity oi 11100se caused by (APA 1984b, FY85 Task 9) and wolf pc>pulatitns through-
and a teratlon ol .,vements project-relat@d increases in r.IOOSI! population modeling (APA out construct ion and into
6etween winter and s\lllller predation could be caus@d by 1'184b, FY85 Taslt 16). operation (APA 1983a, p.
ranfe alter 2rolect c~!etion these artificial local tn-E-3-525 "7).
cou a Increase 2reaat on creases ln densities. This
rates. ~osel&lv arlv{ns r:oose would probably increase the Collect infonnatlon on
~ulat ons to [ow [eve[s direct mortality of moose, bear populations and dls-
......., eli mav 6e malntalnea there especially calves. Ibis ef-tribution of bear harvest
by continued predation. feet would probably dloinlsh (APA l 983a, p. E-3-534
or disappe:1r after several <114).
vears as relative densites of
Ored&~tors and moose bec31e
stabilized (LCL 1985, p. 2.2-
14\.
(I)
Aff•cted
Specie s or
Croup
CBl ~o•e
(cone.)
(Ill
Potencial
I ~~~pact
Hechanlsll
(21) I ncrease In IIIOrtallt\" of
QOOSe oa~ occur due to hunt{ns
a nd po"c ins.
(22) Ice shelvi ng o r fl oating
debris may cause direct !""..or-
tality to moose attempting to
cross the impoundment .
(23) Increase tn mortaU~,. mav
occur due to train and auCorr.o:.
bile collisions caused t.,· in-
creases in traffic Lev elS.
(Ill)
lll!'act
As sessment
St3tUS
• HuntinR can be regulated by
the app ropriate state agency ,
but increased poaching result ...
ing f r om increased access is
difficult to control (APA
l983a, Toble E.3.1~5l. ~oose
are currently poached alon~
the Susitna River; increased
access ~ill almost surely :~n
tagon lze this Illegal cake of
animals in the :absence of 1n·
tensive e nforcement !':!easures
(LGL 1985, P· 2.1-l~).
* l!nder current conditions ,
moose are occassionallv in-
jur~ o r kill ed as theY cross
the river. The numbers of
rr:oose accidently \c.Uled e ach
year as a result of impound -
~ent hazards is unlikely to
exceed 1~ of the population
occurring within S miles of
o;he tmpoundr.~ent. This impact
could be expected t o decrease
even further t hrC\ugh time { A.PA.
1983a, p. E-3-~11, Tabl e E.3.
1~5; LGL 1985, p. 2 .~-!41.
* During construction .1nd o p-
eration of the access r oads
.1nd railway, it is likely that
some moose will be killed .1s a
result of co llls ions with ve-
hicles and trains (APA 198 3o ,
pp. E-3-~77-~78, Table E.J.
1~5). Moose will suffer high-
er r:~or t.1lity rates du r ing the
construct iJn period. However,
most of the conditions neces-
sary for producing a crlti ca.l
problem wi 11 not occur dur i ng
winter over most of the len~th
of the access roads and rat 1 -
wavs {LGL 1985 , pp. 2.~·ltt
:5i.
(IV)
Ongoing
and Pl.1nned
Studies
Further data collection and
analysis regarding current and
future use of wildlife in the
project area Is planne d (APA
198~, Social Science FY8S
Recreation !:tsks 4 -6).
* Impact severitv not suffi-
cient to require. s t udy.
* Previous studies pro,•lded
sufficient infomation for
impact assessment. ~o f u rther
studies are planned.
(Vl
Proposed
~ltorlog
Activities
Collect recor~s J£ irn-
poundr-~ent crossings and
impCtUndment -ca.used mort a 1-
lty durin~ open-·Jater pe-
riod (APA l98Ja. p. E-3-
524 ,t4).
Collect mortalltY data en
road and rail r C'ad cell L-
s lcns (APA l963a, p. E-3-
523 d l ).
I Vl)
P r oposed
~!i.ti~ation
'~easures
Page l~
Public access ::o access road and air-
field prohibited during construction
(APA l983a, p. ::-3-5~; LCL 1985, p.
2 .2 -:!0 •12, tt.l .
l:se of projrcc facil !ties or equiprr.ent
by 01:1p l oyees a nd far.>ll !es f~r h unting
and trapping "ill be prohibited (APA
1983•, p. E -3 -53~ •l~; LGL 1985, p .
2 .~-20).
Recomendations fC'Ir restrictions to
hunting regulations to r educe h unting
pr essure (APA l983a , p. E-3-5~ •l~).
Discouragement oi of!-road recreational
vehicle activity, and phasin~ in o£ re-
creational plan to limit recreational
impacts on v eget.at ion and wildlife i APA
l~83a, p. E-3-!92 •16, 17).
Clearing o f l~poun dments prior to
flooding and re~oval of floating debris
to reduce hazards t o crossing (APA.
1983o, p . E-3-530 ,9 ).
Poss i b le contTol s <'n volur.~e, speed, .1nd
frequency of .1ccess road t raffic f AP.'-
l983a, p. E-3 ·534 dl2).
... e 15
(1) (ll) (ttl) (IV) (V) (Vl)
Affect ed P~eDtial ltlp.ct Oncoin& Proposed Proposed
Species or ltlp8Ct Aaee a-.,t end Plamled Monitorin& !-litigation
Croup llectl•l .. SUt UI Stud lao Activltltl Meaaurea
(I) -· (2~) Drifted -alons ran-• There la ev idenc.e thAt .aoae * 18pac t eewrlty not euffl-Collect 1110r tal! ty data on Cbanp1 In desll!ft and all_.,t of oc-
(cont .) road and r o.d acceaa cOJT tdor s aay elect to vallt 011 r -y• cient to require study. road and rail road collt-ces1 ro..S to reduce l8pacts on IIOOH
and ..-y be.-uy ~de and ran road track• that have slons (APA 1983a, p. E-3-(APA 1983&, p . E-l-533 •lll.
-u of -.. -/or sub-been pl-for mow r .. oval 523 •ll.
ject til• to lllll'•r r i ll< of (APA 1983&, PI'• E-3-479 t o Posatble controls en volume, s~d and
collleion .,rtallty. 480), but there 11 no evidence frequency of acceu road traffic (APA
to •uae•t that -~~ would be 1983&, p. E-3-5 34 •n>.
lntecap&bly trapped by drifted
or plowed s now alone thoee
corrlclon (LCL 1985, p. 2 .2-
15).
(25) Alteration of _ .. dll-• Activitiea alona access cor-tcpact severity not s u fficient Collect nortaUtv d ata on !!ajor ground activit)' vnl be prolllblt-
trlbutlon qy occur due to rldore vnl probably dllturb to requ t re study. roed and r an read co 11 1-ed near seneltlve wi l dlife areal durtna
corridor traffic ..cl d lstur · the norwal acttvtttes of SC81!: slana (A PA 1983a. p. E-l-HftSltlve periods (APA 1983a, p . E-3-
bane e. IIOOH attftlt'tln l to croas cot'-523 •ll. 532 •10).
rldon, particularly durtnc
the con•t ruc:tton period &nd Cbanps In design and allgnMnt of ac-
durtna hunting seaeon CAPA cees road to reduce t.~acts on eoose
1983&, p . E-l -479 . Table (APA 1983&, p . t-3-533 •Ul.
£.3.145; LCL 1985, p. 2.2-15l.
H.,...ver, .. jor cllsruptlor.s of Possible controls on vol\Allt, speed, and
s easonal •t.&ratt.ons are un -f r equencr o f acceu road traffic ( APA
1 ike\ y to occur (LCL 1985, p. 1983&, p. E-3-5 34 •12).
2.2-15).
Publ ic access to access r oad a nd air-
field p r ohibited during constructlon
(APA 1983&, p . t -3-534 •12 , 14).
Planning and devel opme nt of an env iron·
mental briefings pro1ra• for a ll field
personnel (APA l983a , p. E-3-292 •13l.
Avo idance of the Prairie Creek, Stephan
Lake , Fog Lakes, and Indian River areas
by occeu routin~ I APA 1983•, p. t-3-
292).
Discouragement oi off·road recreational
ve h icle activity , and phasinp: in of re-
creational p lan to limit tmpnc t s on \'e-
getation an d wildlife (APA l983a, p .
E-l-292 "14),
I
(1)
Affected
Specie• or
Croup
Cal l1ooae
(cont.)
(II)
Potentiel
I-t
Mechenisa
(26) lncreue in l!l"OW>d-bued
human activity (ro.ct tr&f !ic,
v tttaae acttvttiet , da con ·
stTUCtton ) may preclude use of
so.e areas by ~s.e, parttcu·
larl y ~~nsttive areas such as
cal v ing sites and vtnter habt-
tllt.
(27) Increase in aircr aft
overflights may stress a nicals
or preclude use of some a reas.
(28) ?rlor to filling, clP.ar-
c ut area• i n t he l.mpoundr:ent
mav inh ibit aovements due to
slaah piles and hUIIan distur-
bance.
(III)
I11pact
Asses 111ent
Status
.. !'!ooae appear t o be 110re tol -
erant of disturbances than
cost unsulatet, particularly
if d isturbances are predict-
able, neutral, stt&uU, such
as mov tn1 veh icles. Areas
near source• of disturbance
voold probably continue to be
used if facilitie s sites a r e
r estricted to as nall an area
as possible, if huntl n~ froa
project fac il ltiea is prohib-
ited, and tf I!IOOSt! a re not
directly .1pproacht<1 and haras-
sed by machines or project
per sonnel (APA 198la, pp.
E-l-402-40), Table E.l .14 S;
LCt 198S, p . 2 .2-1S).
• Airc r aft enrout:e to or from
the Watana airstrip uy c ause
~inor dilturbancea to moose ,
but .1111ple evidence of h.abltua-
t lon to .1ir craft overflights
s uggest that litt le or no 1:1-
p•ct vlll occur (APA 1983•,
pp. E-)-40) to 404, Ta b le E.3.
14S ; LCt 198S, p . 2.2-1Sl.
* :lotsy a nd un-predi c table ac·
t ivittes will probably cause
avoidAnce of the active clear·
lng >rea (APA 198la, p. E-)-
40), Ta ble E. ).14Sl. However,
ooose are expected to utilire
!ora§e newlv made availabl(' ~n
c!eared areas. Slash piles
t.:i 11 b e burned, and are not
exoect ed t o inhtbtt move~~~ents
o(ooose ltCl 198S, pp. ~.2 -
I S-l 6l.
(IV)
Onaoinc
and Plann~
Studiea
Previous s tudlea provided tuf-
ficlent 1nfomat1on for \~~pact
•ssesscmt . No further s tud-
i e s are planned.
Previous studies provided suf-
ficient ln fo.-..atlon fo r Impac t
asaessr:ent. No furthe r s tud·
ies are planned .
Impact sever ity not sufficier.c
to require study.
(V)
Proposed
~onttortns
Activities
IVY)
Propos~
p.4i :!3atton
Measures
Pa~e 16
'l&jor ~ound >Ct\v!:y vii i b e prohibited
nea r sens i t i ve wildlife are:.s ~ur!ng
s ensitive period s 1 A.PA 1983a, p. ~-l
Sl2 "10).
?ublic .:.ccess to access road ind 3lr-
field ;:rohibtted c uring construction
(APA l95Ja, p. E·)-~)4 •12, 14).
Us. of project r~cilltles or equi pt~ent
bv eti'D lovees and !Al'Ut:s f or huntina ~nd ti-apPtn@ wt 1! '>e pr oh i bited f APA
198la, p. E-3-Sl'-•141.
If needed, recoa:end..stions to ;J)f&C for
r estrict ions to ht:nt !n~ resul at!C"ns to
r educe hunting pTessure (APA 198la, p.
E-l-S34 t \4).
Oisc our .tgn::ent o f off·r~d recreat!onal
vehicle activit ~, and phasin~ 1:1 n f re·
cre;tional plan t" limit recreati onal
inpacts on veseta:.!on and wildlife t APA
198)a, p. E-l-292 •16, 17).
.o\ircraf t will mair:ta i n mtnt.r:nm alt i -
tudes of 1000 ft above ground le\•tl
durio~ H lghrs lAP A 198la, p . E-;-531
•10).
P1ann1ng un d dt\'f!lopment of an environ-
mentAl br iefin@s :rogram f o r .tll !teld
personne l (APA 19Ela , p. E-3·292 :t\3).
tcpound=tent clear ~n c: ._.Ill not ~egi n un·
til 2 o r l year s ~eforf" fllltn~; ?at·
ches o f ve~etatic~ ._.t 11 be l~i:: u:1ti 1
just be i orc flllbo I APA \9~)a , p.
E·3·5=5 u t ).
":~jor ~round .lct!·:'!.':\" '"'ill be or.:-~ibi
ted ;.ear !ller.siti·:e •.:i.ldllfe arrn.s dur-
in~ s er.sitl'.·e pcr :.,d s (A?A 19'-Jt , p.
:-)-;): •10).
'·~ 17
(I) (It) (Ill) (IV) (V) (VI)
Affected Potent Ill lllpltt Onaotng Proposed P~oposed
Specleo or lapac:t Assess.ent and Planned Monitoring ~lltlgltlcn
Croup Mechlllls• StltUS Studies Activities ~:f!as ures
(B) Moose (29) Incr eue In disturbance • Ihls t.pact Ia difficult to Ihts t.paet ~:~e<:hanl,. will re· Public access to .1c:ces~ road .:1nd air·
(eont.) over the entire baoin uy oe· quantifv (APA l983a, Table eeive further attention during field prohl~lted during constriction
cur due to lncrea1es in hwun £.3.145\. Except for r ec:ru· iapact assess-.ent re Hne.ent (APA 1983a, p . E-3·534).
recreational activities. tional hunting which c"" be (APA l984b , FY85 Task 5).
regulated by ADF~, this Ia· Use cf project !ac!lities or equipment
pact is no t expected to reduce by ec;>loyeu and f310 1.lies for hunting
r.oose productivity or populo• and :upping wU! be prohib ited (APA
tion n..,bers in the Susitna l983a, p. E-3-534).
Basin (u;t. 1985, p . 2. 2·16).
Planning 11.nd development of an environ-
mental briefin gs program for a ll Held
personnel (APA l~8 3a, p. E-3-292).
Discouragement o i ofi-road recreational
vehicle activity, and phasing in of re·
creational plan t o limit recreational
illlpact on vegetltion and wildlife (APA
1983a, p. £-3·2~2).
(C) Caribnu (l) Pemanent losa of 0.3' of • Imp1ct not expected to be Continued studies of 100vements
toul range (lov quallt~· graz· Si8"ificant (LCL 1985. p. and range use (APA 1984b , FY85
ing h1blt1tl due to the lc· 2.3-8). Task 22).
poundments and transaiss icn
corridors.
( 2) Temporary al tent i on and * lr::r.poct r.ot expected to be Continued studies o f IDOVement< Reve~etation and fert ilization o£ dis·
penn~nent lou of o.~ of SiJ;T~iflcant (u;t. 1985, p. and ranRe use lAP A 1984b, Fl85 t urbe~ sites CAPA :983a, p . E-3-526
s.-er r1nge for bu lls ~ue to 2 . 3·6). Task 22). il3).
borrow sites.
(3) Decrease In range values * Dl fftcul t to quant tfy; but Continued stud i es o f movements Public access t o access road 3nd air·
due to i ncreased risk oi fire. not expected to cause a signi-and range use ( APA i984b , FY€5 field p rohlblte~ ~u<lng construction
fi<ant decrease in total range Task 22). CAPA l983a, p. E-3·534 1112 , 14).
availability (u;t. 1985, p .
~.3-8 ). Discouragement o: o££-road recreational
veh!cle activity , and phasing in of re-
creatlonal plan to lil>lt recreational
Impacts on vegetation and wildlife CAPA
1983;;, p. E·3·l92 "16·17).
(4) I ncrease in accident :~or ... • Impact difficult to qUIIItl.fy Continued studies of ..,ve· * Collect data on caribou Clearing of illlpcur.dcents prior to
tallt\• associated vitli ice or predict; may be serious, or ments, range use, population movemertts and populJ.ticn flooding ~nd rec:oval of floating debris
ali elvtns 1 arUtins ice t t ows 1 :::ay result in little adverse s i ze , and productivity; con-size, especially 1U re-to reduce hozards to crosalng (APA
lloatins debris I ana exter.s Ive l o pact (LGL 1985, p . 2.3·8). tinued studies of movements \l i laces to impoundment 198 3a, p. E-3·530 "9).
mua llats a l ona tlie !!J!cund-upper Sus itna-Ne nana s ubherd crossln~ CtCI. 1985, p .
ment shore. and Its populath ~ size (APA 2 .3-8). * Sutpott o i the proposed Nelchina Pub-
i984b, FY65 Task ~2). 1 tc t's e Are:~, or of projects to offset I Collect recor ds of lr.l-population limiting factors (e.g., pre-
poundment c rossin@:S am! datlc~ or hunt!~~) on the Ne lchlna herd
impoundrr:ent-caused r:ort a 1-i n r:ea rbv l reas could be used to com-
ity durin g open-water ?e-pensate for projecc -rel:~ted l o sses,
rlod (LCt 1985, p. 2.3-Sl. should they ocrur (u;t. 1985 , p. 2.1-B).
(I)
Affected
Species or
cr.,..
(C) C.rtbau
(cont.)
(lt)
Potet~tlal
blpact
~i-
(5) Inc:ruaed lepl ha"ut
leW!ls .. y noult f:n. in·
created road accua by hunter-.
to caribau r•nce.
(6) Increased 110rtallty c:ay
reoul t fron increaoed road
acceu by llleaal hunters to
caribau ran&•·
(1) Increase lft collision mor·
tallty due to construction
traffic and increased recrea-
tional traffic.
(8) Disturbance o£ calvlftg
covo by aircraft overfligh ts
aay cause direct calf aorul-
ity.
(111)
IIOpKt
Asseo_,t
Sta~
• Becauoe caribau lnlntina lo
reaulated by penit, incnaoed
acceoo vUl affect only the
diltributlon of lepl lnlnters,
not their total ..-u. The
lllltllOWI n-r of anlull
lepll y harvested in the pro-
ject vlclnlry vUl not l n·
crease unless ao warranted by
the ADF6C (LCL 1985, p.
2.3-8).
* Increased poachins may occur
but not expected to cause pop·
ulatlon effects (LCL 1985, p .
2.3-8).
* Icpact difficult to predict
but not expected to cause pop ·
ulatlon effects (LCL 1985, p.
2.3-9).
• Project nnt expected t o slc·
ntficAntly !ncrease harass ·
eent, particularly vith rel"-
latlon of proj ect aircraf t
(LCL 1985, p. 2 .3-~l.
(lV)
Onaolfta
-Planned
Stlldieo
Sufficient lnforutlon Ia
a•allule for lapeer predic-
tions.
Sufficient lnfo,..tlon '•
a vallule for Impact predic-
tions.
Continued studios of movevnts
and ranee un of herd and sub-
herds I APA 198ltb, F'l85 Task
22).
Suffic ient lnfot"ttltlon Is
avallable for iapact asaess-
..,nt and altlptlon planning.
No studies are planned .
(V)
PropoMd
11onitorlftc
Actlvttieo
Colloct 110rtallty data on
road and railroad colli-
sions (APA 19Bla, p. E-3-
523 .1).
lyt)
Proposed
~it!2atton
~asures
Use of project fac !lltlel or equl p:~ent
by eoployees and ;.:ollle o for huntlna
a.'ld trappln~ will ~e prohibited 'APA
1983a, p. E·3·5l4 "14).
Public act:ess to access road and a ir·
Held prolllblte<! ~urlng conotructlo n
(APA l983a, p. E·3·5l4 .tl2, 14l.
Dilcouragfllflnt of off-road recreational
'lehicte activity, and phasln& in of re:·
cnattonal plan to li.Jai.t recreational
tmp.cts on veptatlon and v1ldl He CAPA
1983a, p. E-3-192 "16-17).
Use of project hen ltles or equlpoent
by employee• and ;acUies for huntlnl
and trappln& vlll ~e prolllblted I APA
1983a , p. E-3-S:\1. nl2, 14).
O..n@es In deolgn and allsnooent of ac·
Cf'SI road to reduce ~cts on caribou
and other specter (APA 1983a, p . t -3-
533 •11).
* Ust o f buses ar.~ prohi bition of ~r
sonal vehicles on :he access r oad dur·
!ng construction 'tGt 1985, p. 2. 3·9).
Public access t o access road and .lir-
fleld prohibited ~"r i ng construction
(APA 1983a, p. t-;-;]1. •12, 141.
Dlacour.Jgemtnt oi ;-ff·ro3d recreational
vehicle activity, aod phasln ~ lft cf re -
creattonal plan tc limit recre:2tt onal
lcpacts on ve•etot!on and vlldllfe (APA
1983a, p. E-3·292 "16·17).
Atrcraft wi 11 uir.:3in •tnillruD al:!-
tudes o f 1000 ft atove grrond le,•tl
durl nt !liGhts, ar.tl possibly 2000 f t
over c alving areas 'APA l98la, p. £-3-
416 .md 531 •10).
Aircraft landtn ~s ·•ill be prohibited
within calving areas in Ta lkeetna ~.oun·
talns, lS ~y-30 :une (APA 1~8lil, p.
E-3-Sll flO).
Planni ng and deve lrp.,.,nt of nn e nviron·
cental briefings program f or all fie ld
personnel (APA 19Sla, p . E-3·292 "Ill.
Po~e 19
(1) (It) (lU) (IV) (V) 1\"t)
Aff ected Potetltial I ~~pACt Oaaoina PropoMCI Proposed
Spectu or I ~~pACt Atses-.tt ....t Plat11'1ed !!onitorinl! !'!!t!Jatlon
Cr oup -i-S tatuS Studies Activities ,.,.e asurea
(C) Caribou * (9) I n creaMCI predation mo r · * Impact .. y or .. y not be llll· * Collect data o n car ibou * Qlan,es in desian and alillftl'le nt of
(cont.) tality on caribou prevented portant , depend ina on d~ree JDOVftlents and populat ion access road to r e duce l.mpact!: on cart. •
fr .. reach ina areas they nor· of Mrd .,vement r est ric tions she (APA 1983a , p. £·3· bou and other specleo (APA 1983o , p .
ully use. caused by project fac:i lit los 523 •3). E-3·533 •lll.
(LGL 19851 p . 2.3·9).
(10) Potential affects of t he * lcpac:t diff icult to quantify Continued s tudies o f .,Vftll!nt Collect data on caribou Clear in' o f il:lpoundments prior t o
illpoun.-..,t aa a barrier t o or predict; altered 8(We.fttl of Mrd, ranp use , population _,ts ....t population flood!.~& and re110va1 of floatic.g debris
.,.,_to ioc:lud.l: a) reduc:· are not Hllc ly to procluc:a pop· size, and produc:tivity; con• she, especially a a re· to reduce hazarda to cross ina I APA
t ion in the frwqu..,c:y of ulation·1eve1 effects (LCL tlnued studies of .,_ts of lates to !Jopourtdltent 1983a, p. £•3·530 •<9).
cross11111 of the \Oat.,. U:· 1985, p. 2.3-10). upper Susttna·llenana sutlllerd croaaiog (APA 1983a, p.
~t area vith consequent ....t its population s ize (APA £-3-523 "3) •
I dec:reasea in uoe of portions 198lob, fY85 Task 22).
of the ranp; b) isolation of Collect records of U:-
subherds havinf separate calv· ~t crouioas and
ina around•; c increased lmpoundr.ent·caused 100rtal·
enersr expenditure due to ity during open·vater pe·
lenathened eiaration r outes, riod (APA 198 3a, p. £·)·
posaibly r .. ulti na tn r educed 521t •5l.
viability of neVbo m cah·u
and other conaequencet of
reduced pllyaical cond ition .
(ll) Drifted """" aouth and * lapact not quantified, but Continued s tudies of INJYe~~enta Collect data on caribou
southwat of the reeervoir uy not expected to be stanlficant of Mrd (APA 1984b, FY85 Task ..wecents and population
block ..,.,_ts to por tions of (LCL 1985, pp. 2.3·5 and 10). 22l. al.z:e, especially as re-
ttl@ ranp. latea to icpoundloent
crossing (APA 1983a, p.
£-3·523 •3).
Co llect r ecords of te-
poundllent croaalnaa and
tmpounc!D:ent·caused 1110rtal·
ity during open-water ,e-
riod (APA 1983a, p. E·l·
521t nit).
(12) Blockap or alteration of * Blocked crouing of the ac· Cone inu~d stud t ea of :DOveeents Co llect data en caribou 0\anses ln design •nd allgntDent of 3 C '"
herd aoveaents by the access cess road is not anticipated and population s s ize of sub· .:ovn.ents and populatlcn c e ss r oad to reduce lcp:tcts on caribou
road . t o c:wse population-level herd (APA 1984b, fY85 Tas k s ize (APA 1983a, p. E-3-(APA 195Ja , p. E-3-~33 "Ill.
effects (LCL 1985, p . 2.3·10). 22). 523 nl.
• Use ~i buses anC: p rohibition o i per-
sonal ..-ehlcles on the access r oad C:ur·
ing construction I LGL 1985, p. 2.3-9).
(13) Avoidance of construc tion * Impact not quant if ted but Continued studies of move~~ents Co l lect d ata on caribo u tcpou.~c!=ent clear !~~ \Jill not begi n un·
sites and clearing operations, not expected to r tosu 1 t in an y o f herd (APA 1984b, FY85 Task move.ents and population til ! ~r 3 year s before f illln't; pat·
pa rticuhrly by cova and col· population effects (LCL 1985, 22). ~~~e .. ~~:A 198.3a, P: £·3-ches o! \'egetatlrr: \o'lll be le f t untll
ve e due to hwun disturb an ce . p. 2 .3-10). j ust ~einre fillin g (APA 1983a, p . E-
3·525 ul).
Clearing activities will be prohibited
near concentr3t1ons of lftigrating c.1ri·
bou during sensitive \.riods (APA
1983a. p. E-3·532 u10 •
(1)
Affected
Specleo cw
Croup
(C) Caribou
(cont.)
(D) Dall
Sheep
(ll)
Potential
l.,act
llecbani ..
(1.4) lncreaoed -rl)' demdl
particularly to presnmt cow
(or c.,... vtth calvu) due to
dllturtw>ce by connruction
traffic on the access road be-
._ the Denali Hipay and
Wauna.
CIS) Overfllal>tl by aircraft
uy advenely illpact caribou
throuat> lncr~ased eneriY
coou. Hill> levels of Clstur-
bance uy affect productivity
Csroup• vith feules and cal-
vet are mat tenaltln).
(16) ~nee• 1n ranee us•,
dllruption of msratlor. ;:at-
terns and abando.-.ent o ! tra·
dltional c.alvtns areas r..ay re-
sult frc. an increase tn re-
creational activities and an
increase in non-project devel-
opment activitiea, both facl.l-
i t.ted through increased ac-:
cess.
( 1) Partial Inundation of the
J oy Creek mi neral lick. !nun·
dation vil 1 cov er over 2=\ of
the lick surface area during
the months of uximua use . At
aaxlona 1-cll:!ent level In
October, lt'l'\. of lick surface
111\l be flooded.
(2) Arus of the lick be !ow
lUX!Jma fill level uy suffer
s oee leaching and erostcn ,
uking thla area leas valuable
11 • lick site.
(111)
l.,act
..... _t
StatUI
* Iapect not quantified, but
not expected to reeult In pop-
ulat l on-level effecu (LCL
1985, p. 2.3-10).
• lDpact not quantified, but
not upected to be olsnificant
1! pilou uintain oufflcient
altitude (t.CL 1995, p.
2.3-10).
• Difficult to prodict but not
anticipated to caus e popula-
tion-level !~>poets (t.Cl 1985,
p. 2.3-11).
• Cnlikely that sheep will
discontinue use of the lick
due to partial inundation (APA
1993a, pp . E-3-419 to 420,
Table E.3.lt.8). ln addition,
s ites to be inundated account·
•d for only 2 .6\ of licking in
1983 (Tankersley 198/o). Im-
pact not anticipated to be
!Ciportant (t.Cl 1985, pp. 2.1.-6
to 7 ).
* Erosion cay tncreasf' avaU·
ability of aloerals, however
this Ia not anticipated to
affoct the quallty of the lick
slgniflcantly. l~ct of
leaching has not been fully
quantified (t.Cl 1985, p.
2.4-7).
(IV)
Onaolnl
and Pbnned
Stud leo
Continued studieo of _,tl
of th~ herd and S\lhllerd (APA
19841>, fY85 Talk 22).
SufHclent lnfo,...,.tlon !1
anilo.ble for il!pOCt aooeu-
Mnt and •ltisatlon planntnc.
No fun:her studlea are plan-
ned.
Cont1nuod studies ot .aovH~entl
and range use (APA 198/ob, FY85
Task 22).
* Sufficient lnfomaticn is
available for impact assess ·
ment and ,.itigatlon planning.
* Sufficient lnforutlon Is
available for tapact •saesa·
.eat a.nd •itlptlon planning.
(V)
Pnopoled
llonitorlns
Activities
Collect data on caribou
.,_u and pop~latlor.
otze (APA 198Ja, p. E•l-
523 •3).
Collect data on caribou
moveeents and populatiO!\
size (APA 1983a, p. E-;-
523 •3).
Collect i n forma t ion on
sheep use of the minera:
lick after inundAtion I.;PA
1983&, p. C:·l-S24l.
Coll•ct lnf~rmation on
sheep use. of mineral licit.
and on luch lng of soi: s
after lnundat !on ( APA
1983a, p. E·3-S24 •51.
'Vll
Proposed
!'lltlaatlon
Measure a
Paae 20
Chanses ln deolgn >nd all..-nt of ac-
cess road to re<tuce itrpacta on caribou
(APA l983a, p. E-3-533 •11).
• Use o f buoas and prohibition of per-
sonal \·~hiclea on the access road dur-
in& conotructlon 'LCt. 1985, p. 2.3-9).
Aircraft vill ulnutn •In-oltl-
tudes o f 1000 ft abon around level
c!urln§ fl!al>tl, and poostbly 2000 ft
over calving areas (APA 19R3a, pp. £-
3·416 and 531 •10).
Aircraft Iandin&• will be prohibited
vithln calvlns area in Talkeetna Moun-
ulna 15 May-30 ;une (APA l983a, p. E-
3-531 u10).
Plannlnc and devel~t o f an environ-
Mntal brleHnss prosrom f or all flel~
personnel (APA 19S3a, p. E-3-292 •nl.
Changes in duicn and al1ar-nt of ac-
cess ro.d to reduce i~cts on caribou
and e ther species (APA 1983a, p. E ·3-
533 •11).
Public acce1s to access road and air-
field prohibited during construction
(APA 1983a, p . E-3·531. M12, 14).
Discouragement of off-road recTeational
vehicle octlvity , and phnsing In of re-
creational plan to llmlt recreat!onal
impacts on vegetation and wlldlife (APA
19!3o, p . E-3-292 u H-l7l.
tf needed, exposur!! o f new sotl at J4y
Cree<. :tlneral lie~ (APA 1983&, p. E-3-
S34 "lll.
I! r.eeded, ~xposure o f new son lit Jay
Creek ~lin.ral I !ck (APA 1983 , p. £-3-
534 u 1)).
Po~ 21
(I) (11) (Ill) (IV) (V) 1 \j)
Affected Potential Iepact Onaoinl Proposed Proposed
Species or l111>act Asse1..-nt and Planned Monitorinl Htt 1 ~at1on
Group llechania Status Studies Activities l'!'!asure•
(D) Dall (3) Watana iiOpOWI-nt may de· * Impact not expected to be hapo:~;ct severit)' not s uffichmt
Sheep lay aprinc phenolol)' and lead s igntricant (LGL 1985, p. t o require study.
(cont.) to tncrea1ed anov ac\allation 2.4-7).
i n south·fac ins s lopes of
Wa tana Hills.
(4) Increase in a ccident oor· • Unliltelv to cause mortalitv Collect information on
tality due to ice shelves on of t'lore than a few s h eep, noi sheep use of t he mineral
tower sections of the Jay expected to cau se population-ltck after inundat !on
Creek •ineral ltck in early level i~~~>ac t s (LGL 1985, p. (APA 1983, p . E-3-524).
spri n1. 2 .4-7).
* ( 5) Increased legal harvest * To t a l nu.ber of legally bar·
l evels may r esult from in-vested sheep regulated by
creased hunter access to Dall ADF&C and should not increase
sheep range . s ubstantially CLGL 1985, pp.
2 .4-7 to a).
* (6) Increased ooor taltty NY * I nc rease in Illegal harvest Use of project fac :lit ies or equl p:llent
result f rom increaaed access not expected to be significant by emp loyees and !ar.U ies for hun ting
by poachers to Dall sheep t~ overall population l evel s and trappln~ will be rohibited (APA
range .. CLGL 1985, p . 2.4-8). 1983a , p. E-3·534 "14 •
If neede d, recOII'IC!endat i ons for res eric-
t ions to h unt ing :-e~rula tions t o reduce
harvest pressure 'APA 19e3a, p. £-3·534
~14).
(7) The liatana t.poundment may • Sheep may cross open wa t e r Collect records of im-• Clearing o f hr.ro·.mdment s prior t:o
b l ock some movemen t to lic k o r ice , move upstream 1 mile poundmen t crC'SSin gs An d flooding and removal o f floating debr is
sites o n the east side of Jay before crossing, or not c r ess impoundment -cau sed mor ta 1-to rel.uce hazar ds :o crossing f APA
Creek. the impoundme n t , potentially it~· during open-water pe-1983a, p. E-3-530 "9). Special at:en-
reducing the availabi\1 ty of riod (at Jay Creek) (APA tion ':\l removal o f debris in t he :owe r
lick sites on the east side of 1983a, p. E-3-524 •<.). J ay Cre ek area wi 1 t be ou:complished
Jay Creek. However, the main (LCL 1985 , p. 2 .L-c 2\.
lick on t h e west s ide of the Collect inio macion f"n
c reek wi ll reoain available , sheep u se of mineral lick I f needed, exposurt! of ne\ol' soil a:. J a y
thP.refore not r esulting in an and on l eachin t o f soils Creek ::i neral lief. t APA 1983a, p . £·3·
i <.portant le,·el of iiii>&Ct (LCL After i nundation (APA 5 34 u l~l.
1985 , p. 2.4-8). 1983a, p. E-3-524 •5l.
( 8) Increase d .. ubolic energy Impact not quantified but not Suffi cient Info rmation Is Ai rcr a f t will ma lr.tain min!r.lum a l ti -
requlre~~ent s and a bandoneent expected t o t• s i gn ificant If a vailable for impact assess-tudes o f 1000 f t ato..,e g r ound le\'el
of s ome areas due to aircraft height restr ictions are main-r..ent and mitigation planning. duri"S fl ights (;.FA 1983a, p . E-3-5 )1
overflights . tained (APA 1983a, pp . E-3-418 ~o studies pl anned. n l O).
to ~1 9, Ta ble E.3 .148l.
Planning :and dev elC';n:~ent of an en•:·i r o n-
rcental b r i cfin~s p rC~sram fo r al l :teld
per sonne l (APA 19:3a., p. E-3-292 ':1 3).
Pa11e 22
(I) (II) (Ill) (IV) (V) f\'1)
Affected Potential TIIJ)aCt Onaotn11 Pr0110ae<1 Proposed
Species or l..,.ct Asses11111!nt and Planned ~itoring Hit!l!ation
Croup Meehan in Status Studies Activities Measures
(D) Dall (CJ) Disturbance of lheep uti-Impact not quantified. Dis-
I
Impoundment clearing schedule to be
Sheep Uzing lov elevation winter turbance will occur only over determined in consultation with re-
(cont.) and spring habi tau due to im-the short-term period of im-source agencies (APA 1963&, p. E-3-526
poundllent clearin11 activities. pounclllent clearing and will n1).
probably not produce a serious
population effect (APA 1983&,
Table E.3.148).
(10) Disturbance fr011 aircraft * Icpact not quantified; but Sufficient information is Collect infonnation on Aircraft will mair.tain minilll11111 alt1-
lanalnu 1 dearln~acdvltles 1 not expected to be significant nvaUable for impact aueu-sheep use of mineral lick tudes of 1000 ft above ground level
and rec!'eatlonal ats near with planned project controls, ment and mitigation. No stud-and on luching of soils during fllghts (APA 1983a, p. E-3-531
tfie la% ~ree~ mineral licit mal provided there is little re-ies planned. after inundation (APA nlO).
affect us use IJy sheep. creational disturbance. Fre-1983a, p. E-3-524 tS).
quent visits could result in * Aircraft landir.~s and boat traffic
abando=ent of the lick with will be prohibited within 0.5 mile of
resultant changes in distri-Jay Creek licks, l ~ay -15 July (APA
button and local population
levels (APA 1983&, p. E-3-420,
1983a, r· E-3-531 "10; LCL 1985, p.
2.4-11).
Table E.3.148; LCL 1985, p.
2 .4-6). *Major ground activity (includir:~ boat
and floatplane use l will be prohibited
within 0. 5 mile of Jay Creek llcks, 1
May-15 July lAPA l9~3a, ~· E-3-532
"10; LGL 1985, p. 2.4-ll •
* Impoundment clearing will avoid the
Jay Creek tick area from 1 May-15 July
(LCL 198~, p. 2.4-11).
(E) Brown (1) Pemanent loss of SOlie Of radio-collared brown bears Continued studies of habitat Collect infomation on Habitat enhanc.,er.t and protection mea-
Bear r;rins !ei!illns haliltat aue to pr.,sent in the project area, use and timing, den site char-bear populations o>nd dis-sures on replace!:!ent lands to compen-
poundments. 5()<·, in 1980 •nd 61' in 1981 acteristics, and season~~l food tribution of bear harvest sate for permanent ~abit~t loss may
mo,·ed l"to the future impound-habits f APA 1984b, FY85 Task (APA 198a, p. E-j-534 bene!it burs (AP A l 983a, p. E-j -527
"'ent zones in spring. This 17). "14). ••6).
loss is apect"'d to be "'""t
important to brown bear popu-
lations in spring wllen great-
est use of inundated and ad-
jacent ar..aa occurs. Some us"
also occurs in sum~er and
fall. (APA 1983a, p. E-3-420
to 425, Table £.3.149).
(2) Impoundeent clearing will Impact not expected to be sig-Continued studies of seasonal Collect information on tmpoundment cleari~g will not begin un-
affect habitat qunlity for nificant in the 2-3 years be-food habits (APA 1984b, FY85 bear populatlono and dis-til Z or 3 years ~efore filling; pat-
brown bears in spring. fore filling (APA l'i83a, p. Task 17). tri button of bear harvest ches oi vegetation ·•ill be ldt until
E-3-422, Table E.3.149). (A PA 1983a, p. E-l-534 _lu st before filllr.g (APA 1983a, p. E-
itl4). l-~25 "I).
( 3) DlsTlac..,.ent of bears from May affect cub survival, in-Conrinuf!d studies of seasonal Collect in formation on
2reaenc•v usea fia61tats ~esl!e-crease predation pressure on habitat use and food habits bear populations and dis-
ciatlv in 11 2rliia, llal; result ungulates, increase intraspe-( APA 1984b, FY85 Task 17) • tribut ion of bear harvest
In loca[lv more det~se 222ula-cHic mortality, and decrease (APA 1983&, p. E-3-534
tiona ana 'Teater lntr.ns,ec{ .. reproduction. 1114).
Fie C2!2;!t tlon anCI scrl e [n
83Jacent areas.
(I)
Ufeeted
Speciea .,.
Croup
C!l Brown
Bear
Ccont.l
(lt)
Potntt.al
lapa<:t -i-
(Itt)
Itopact
A.ssesatent
StatlU
(4) Lou or alteration of bib· l•pac:t not quantified. Babi·
I tat clue to borrow s ites. tat values uy increue on
recla!J:Ied areas clurtns early
s t aps of plant succession
IAPA 198la, p. E-1·421 to
l.22l.
( S) Potential !~~~pact on den·
n ing areal due to tepoundment
shore eroaton.
!!!!!·
( 7) Reclucttons in upstreu: un-
plate prey populations "'"Y
<:auae corresponding reductions
In available food supply for
bears, especially in the
sprtna.
( 8) Pouible reduction In
avaUabll tty of animal prey
(e.@., sahoon, IIUOSe) and veg-
etable foods in dovnstrem
reaches.
(9) l.owr population s izes and
decreaHd re-crul~t of bear s
ln t-he study area -y result
In fever subadults fr001 the
study area available to d ls-
perae out to and populate ad-
jecent areas.
(10) Increase In 110rull :" of
&ears due to attr action to
h~n refuse and reveaetated
area• near conatructlon sites ,
and the re•ultant increase In
the lncldiilce of h,..n/bur
encounter• 1 retultin' in de·
struc:t{on of the "or endlna
Gear".
lCJl)ICt may occur on potcr.ttal
or unknown den sites, but has
not been quantified; not ex·
pected to be significant (APA
l98la, Table E.1.ll.9).
lm,..ct not quantified and dif-
ficult to predict (APA 1981a,
pp. E-1·426, 481 , 484, Table
E.1 .1l.9).
lcpac t not quantified CAPA
i:~~,:9~~· E·J-l.25, l.26, Table
~ttigation for salmon and
coose may negate this aspect
of the l1Dpact . Altered plant
succf!saion r..ay reduce or in-
crease plant foods available
to bears.
tcpact dlfflcul t to quantt!y,
but uy affect nearby popul a·
t ~ons . ·
lcpact not quantified and dtf·
rtcult tr p r edict (APA 1981a,
p. t-1-S23 to loll., T~ble t.1.
149).
(IV)
Onaoins
and Planned
Studies
Continued studies of babitat
use and tbin& CAPA 1984b,
FT85 Taat 17).
Continued studies of den site
characteriltics ( APA 198lob,
f'I8S Task 17).
Continued studies o f aeuon&l
habl tat use and a:o..-e:oenu (APA
1984b, FY8S Task 17\.
Cont inued studies or seaaonal
food habl t1 of bears C APA
1984b , FY85 Task 17). !loose
calf morta 11 ty St~dy (APA
1984b , FYBS Task 0 ).
Downstream r;,oose studies (APA
198lob, FYBS Task 23). Oovn-
streo hydrologic and vegeta-
tive studies (APA 1984b, f'/aS
Task 1S). Sal11on studies (APA
t98l.a, Aquatic f'ISS Tasks 12-
16 ).
Opportuni s tic lnforl:lltlon on
dispers al in the course o!
I'Uked bMr studies (APA
198lob, FY8S Task !7 ).
Sufficient lnfon:atlon Is
avat table for impact asaeas-
soent and •itlgatiMI. No stud·
les planned.
(V)
Proposed
!lonitorins
Activities
Collect records of tm-
pciiiiiGent crouings and
1.8poundltent·caused 100rtd-
tty during open·vater pe-
riod (APA l98la, p. t -3-
S24 ... ).
Collect data on changes in
downst ream veget3tlve cov-
er (APA 19~1a , p. E-1-521
•2).
Collect lnfon:oatlon on
bear populat ton• and dis-
tribution of bear harve~t
(APA 1981&, p. E-1-514
"14 ).
rvn
P~oposed
~!tt~tion
~easures
Pap 23
ll.obltat lou vUl be 10lnilolzed by stde
borrow t Khnlques for road construe·
tlon , spoil depos ition I n lcpoundcents
or d~leted borrow~-sa, and c c nsoll-
dotlon o f project !1. .lltles (APA
1981a, p. t-1-~26 rl2).
Reve t;etation an~ :ertiliz.uion of dis -
turbed sites (APA l 983n, p . E·3·526
•1).
Clurtna lmpouneents prior to flooding
and reeoval of !loating debris to re·
duce ~nards to c~os•lng (APA 198la, p .
E-3·530 09).
U.pacts f r otD dec:-e ase:d prey a vat labtl-
ity should be r~uced by Masure s to
mttiglte impac ts tc ungulate popula-
tions fAPA 1983a, ?· t-3-SJ6 •16).
l mpacrs f r om decreased prey ;Wa tlabfl-
ity should be re~uced by measures to
mitigDtf impacts :o s all!lon .ln d un@:ulate
populotlons (APA !981a, p. E·l-SJ6
o16 l.
Education pr cgr a::, ond strict garbo,e-
contro l ~:easures and e n forcerent to
pre\'tnt c rea';ion of nuisance 3nlc.lls
(APA l 9S3a, p. E·l-53S •1Sl.
Planning and deve 1 J ptrtent of an environ-
mental brlefln .. r rogr:un £or all Held
personnel (APA l9a1a, p. t -1·292 •11).
Paae 21o
(I) (lt) (Ill) (IV) (V) (VI)
Affecte<l Potential t.pact Onaoinc Proposed Propose<!
Species or I.,..:t Asses58ent .nd Pbnned llonitortna Hitig.tlon
Croup !!«ban in Status Studies Activit tea Heasurea
(£) lrovn (11) Cruter suaceptlbillty of Kuntlns ;>olicy for the project Sufficient infonutlon is Collect lnfonution on Public access to access road and air-
Bur burs (p.rtlcubrly hablt,..te<l area currently allows liberal available for t.pact assess· bear populations and dis· field prohlblte<l durlns construction
(cont .) burs) to hunUna and ~chins brown bear harvest levels Mnt .ad altlaation phnnlna. trlbutlon of bur harvest (APA 1981., p. £-3-534 tl2, 14).
aortdity due to l.aprove<l ac-Which em be reaulate<l In the No studies are planned. (APA 1983a, p. £-3-534
cess in the area. future . losses to poachers t11o). Use of project facUlties or equlpcoen t
vtll be an unavoidable adverse by employees and faailles for huntlns
i•pact (APA 1961., pp. £-3-and trapplns will be rohlbited (APA
423, 4 26, 484, Table £.3.149). 1983a, p. £-3-534 n4 •
If needed, reca-endatlons for restrtc-
tiona to hunting regulations to reduce
huntins preuure (APA 198la, p . £-3-5 34
tl4).
Disc:ouraaeMnt of off-road recreational
vehicle activity, and phasing in of re-
creational plan to liait recreational
l.apacts on vesetatlon and wildlife (APA
1981., p. £-3-292 •15-17).
(12) Avoidance of traditional lapact includes loss of feed-Continue<! studies of habitat Collect infomation on Possible controls on volume, speed and
use areaa caused by lnc:rea•e ln1 habitat Mar ac.cesa corTl-use and Uatns (APA 1984b, bear population• and dis-frequency of access road traffic (APA
in huaan activity at construe-dora, vU lages, airstripa, and FY85 Task 17). tribution of bear harvest 1983a, p. E-3-534 •nl.
tion sites and operations fa-bon'ov sites. Soee bears aay (APA 1983a, p. £-3-534
c!lltlu. be displace<! or alter their t 14). Avoidance of the Prairie Creek and
.wsents; others uy habltu-Stephan Lake areas by access routlns
ate and lead to h~aan /bear (APA 198la, p. £-3-292 114).
lnter-octlon probleu (APA
1983a, ~· E-3-42t., table
'::.3.149 .
(13) Disturbance fr0111 access Significant lii!J>act not expec-Continued studies of den site Collect information on den Ground activity vlll be prohibited
corridors, vll lages, air-ted because brown bear dens charact.eristics (APA 1984b, locations throughout con-within 0 .25 miles of known active bear
strips, and clearing of trans-are typically at higher elevo-FY85 Task 17). struction (APA 1983a, p. dens 15 September-15 Hay (APA 1983s, p.
million line 10ay d isplace tlons than proposed project £-3-524 &6). E-3-532 110).
bears fr011 current denning facilities; Identified dens
areae. are not in the viclnlty of Plannina and development of an environ-
such f&cllltles (Hiller 1984, mental brlefinss program for all field
Table 23 and Fig. 8). personnel (APA l983a, p. £-3-292 •13).
(lt.) Overflights or haras S111ent * t-,act difficult to q ... nti-Sufficient Information 11 Alrcroft vlll aalntaln •inl.llull alti-
by aircraft uy disrupt fee<!-fy , however some habituation available for l~ap1ct a1sess-tudes o f 1000 ft above around level
1n1, restins and dennlng ac-to overflights would be expec-aent ond mitigation planning. durlna flights (APA l983a, p. E-3-531
tlvltles. ted. No studies are planne<l. t10).
Plannlna and devetopeent of m environ-
~~~ental brieflnss prosr• for all f ield
personnel (APA 1981., £-3-292 al)).
Pa~• 25
(1) (11) lltl) (IV) (V) (\'1)
Affected Potenthl l"l'act On coins Proposed Proposed
Species or I ..,act AsaesSMnt and Planned ~nitorin~ M!.ttutton
Group IIKhani• Status Studies Activities '~easures
(F.) Brown (15) Recreational disturbance Impact not quantified, but Continued studies of seosonsl Public access to acces1 road and air-
Bur fac{litatl!d bv Increased ac-could be slsnificant. Most habitat use and food habits field orohlblted ourln1 construction
(cont.) cess uv cause avolaiiice ol slsnlficant Impact vould like-(APA l9114b, F'Y85 Task 17). (APA 1983a, p. £-3-534 112, 14).
tr4dltlonal use areas and mav ly be froa recreational actlv-
l eail to Increase in Fiuun16Ur lty In the Prairie Creek-Avoidance o f the Prairie Creek and
Interact Ions. Stephen Lake area --a trod!-Ste'phan Lake areas by access routi ne
tlonal area for s.-r feedins (APA ;.9@3a , p. £-3-292 114).
on sal1110n (APA 1983a, p . E-3-
421, Table £.3.149). Dlscourasement o f off-road recreational
vehicle activity , and phaslns 1n o! re-
creatlonal plan to llalt recreat i onal
l "l''ct s on veKetatlon and vUdllfe IAPA
1983a , p . £-3-29 2 •16-17).
(F) Black (1) Permanent loss of hlsh 1/lll exclude black bears up-Continued soonitorlns of black Collect tnfor:1atton on Habitat enh.anceeent and protection nea-
Bear t:!!tv forest F.abltats due to stream fro. \latana Cretk. and bear population• and 80Ve.efttS bear populations and dis-sures on replacec~ent lands to c0111pen-
nC!iiiii ta. slsnlficantly lower popula-In the area Is planned (APA tribution of bear harvest sate f or peraanent habl t a t loss will
tlons In the project area (APA 1984, F'Y85 Taak 171. (APA 1983a, p. E-3-534 provide soae benefits for black bears
1983a, p . E-3-427, Table £.3. #14). (APA 1983a, p. E-3-S27 16).
lSO).
( 2) Loss of covu and foraaln! Ihls vill be realized prior to Continued 1110n1tor1na of black Impound~>ent clurlr.s will not begi n un -
areal In foreat habitats due Impounc!Mnt filling due to bear populations and move.nts til ~ or 3 years before filling; pat-
to lJii)OUf\aHnt clear1ns. clearina activities (APA In the area Is planned (APA ches o f vesetatlor. ~o~l ll be l eft until
1983a, p . £-3-~28, Table £.3. 1984b, F'l85 Task 17). just ~efore Hlllr.~ (APA 1983a, p . £-
150). 3-S25 01).
(3) Temporary l o ss of forest Impact represents a tempora ry Continued studies of black Hab itat loss will be minimized by side
hsbltats In borrov lites . loss of habitat for black bear populations and movet!M!nt;s bonov technique:• for road construe-
bears. Revesetatlon will pro-(APA 19@4b, F'Y8S Tuk 17). tlon, spoil deposition In Impoundments
vide s pring for .. e during o r depleted borrow areas, and consol1-
early successional stages, And dation o f proj ect f oc llltl es IAPA
re@rovth of forest will pro-198la, p. E-3-S26 u2).
vide continued habitat for
bears (APA 1983a, p. E-3-427, Revegetation and !ert il!zat lon o f dis-
table £.3.150). turbed s ites ( APA 1983a, p. E-~-;26
•3).
!llnleize loss and aiterat l on of habl-
tat, particularly l fss abundant habi-
tats a nd sensltve 111ldl!fe habitats
(APA l983a, p. E-!-291 •1-lll.
(~) Penoanent lou of so:oe den Of known black bear dens In ldentlficatlon of active den Collect lnfonoatlnn on !lajor ground actl\'lty will be proh ibit-
sites due to l!poundllen:s. 2nd the project area, S4~ were in sites of black bears wU 1 con-b l xk bear den locations ed vltl:ln 0 .25 •lies of all knovn ac-aue to d[sturbance and dis-the Watana and 6\. vere in the tlnue (APA 1984b, F'Y84 Task throughout construc:tio:"l tive bear dens bet\.-.en 15 Septecber and
2lacsent lroa construction Devil Canyon Impound.,.,nt zones 17). (APA 1983a, p. £-3-524 15 !'.ay (APA 1983a, p. £-3-S32 h 10l.
:tnCI ;nratlon laciiitles and (!'Iiller 1983). •6).
activ ties.
(5) Poulble f.llpac t on den !~~pact not quantified; paten-Continued studies of den site Collect lnfonoatlon on den
sites due to l~nt shore tlal or unknovn den situ uy characteristics (APA 1984, locations throuJhout con-
eros ton . be affected but t.pscts are F'Y85 Task 17). structlon (APA 1983a, p.
not expected to be shnlflcant E-l-52~ ~).
(APA 1983a, Table £.3.150).
(l) (II) (Ill) (IV) (V) IVl)
I
Af'ected Potential lmpact Clngoins Proposed Proposed
Species or l"Pact Assessment and Planned ~ltoring !'litigation
Group Hechanisa Status Studies Activities ~asures
I
(F) alack (6) Habitat alteration along Pos:ttve and negative iapac:ts Continued studies of black Collect infomation on Selective clearing i n transmission cor-
Bear the tranniss ton corridor. on black bears. Loss of for-bear habitat use and 110ve•nts bear populations ant C!.s -ridor. ?Cmitti r.g sera\ vegetation u p
!cont.) tit habitats along the corrl-(APA 1984, FY85 task 17). tribution of bear harvest to 10 ft I n hel~t (APA l9!3a, p. E-3-
dor will constitute so.e habt-(APA l96 3a, p . E-3-)}4 526 •4 ).
tat t oss, althoush spring for-•14).
age within the corridors wlll !1in t:~ize loss of :orest areas through
p rov ide added food (APA l 983a, al icroent of access road and transmts -
p. E-3-4Q4, table E.3.150). stC'In corr i dor, and othf'r ~esures (APA
l9B;a , p. E-3-539 •23).
( 7) Reduct ton In avallablllty tmpac t not quanti fled, but not lmpact sever! ty no t sufficient Co llect i nfomation on
of low shrub habitats in expected to be s i gnificant t o require study . bear populations and <!is·
sprin~ due to delayed melting (APA l983a, Tabl e E.3.l50). trlbutlon of bear harvest
of snow drifts south and IAPA 1963a , p. E-3-534
southwest of the impoundment. 014).
( 8) Reductions In prey ropula-Proj !Ct impacts on soae food Continued investigati ons of Collect lnfonutlon on Impacts from decre a sed prey •vallabil'"'
tions, If the~ occur !e.g., res01arces of black. bears are bear food habits vii l better bur populations and dls-lty should be reduced by measures t o
salmon, eoose , vould nega-as y•H uncertain, and bears docu:ment important food trlbutlon of bear ha:"Vest mitigate impacts to salr.on and ungulate
tively l"Pact black bears In may not be adversely affec ted sources for b 1ack bears (APA (APA l993a, p. E-3-534 populations (APA 1983a, p. E-3-536
dOWftltre• areas. IAPA 1983a, p. E-3-429, table 1984b, FY85 Task 17). n4l. •16).
E.3.1 50).
(9) Increased avallablllty of No noticeable llrpact expected lmpact severity not sufflcier.t Collect data on changes in Use of multllevel intake s truc tures on
early spring forage dovnstre .. on black bears (APA l983a, p. t o require study. downstream veCietative cov-the da::~s to maintain downst!'eam river
fr011 l•poundlr.ents due to al-E-3-429). er (APA 1983a, p. E-J -523 teeperatures as close to norc.al a s pos-
teration of vesetation phenol-•2). sible (APA l983a, p . E-3-526 45).
ogy.
(10) Decreased availablllty of lDI~act not quantified but not Cant inued refinement of down-Collect data on chan~es t n
early succes1ional vegetation expected to be signiHc•nt strelll!l h ydrology ".odellng ma y downstre ao ''egetative cov-
typel due to r i.ver hydrC~logic (APA 1983a, p . E-3-4~9, Table better enable prediction of er (APA l983a, p. E-3-523
changes dowstream of the im-E .3.150). effec ts on black bears (APA t2).
poundiDenta. 1984b, FY85 Tas l<s 5, 15 and
23).
Pogo 27
(l) (It) (III) (IV) (\') (VI )
Affect ed Potential lODpact O.golng Proposed Proposod
Species o r l•ct Assesseent and Pl annod Monitor i ng Mlt l~>tlon
Croup Mech anism Status Studios Acttviti!s ~asures
(F) Black (11) S... Ind irect habitat ll:lpact not quantlfiod, al-Contlnuod s tudios of habit at Collect tnfomat ton on t cpo~.::1doent clearing wil l not begin un-
Bear loaa (especially ber ry ror a o-though s.,.., habltuat ion to use and black bear move.eents bur populations and dis-til 2 o r l yett r s before f U ling; par-
(cont .) in& s hrubland) and poss!blo huun act ivities will occur (A PA 1984b, FY85 tuk 17). t r ibution of bear harvest c h es of vege t :~t ion wil l be left until
blocbge o f llOVements to 1o -(APA 1983a, p. E-3-427, T1lblo (APA 1983a, p. E-3-534 just boforc filling (AP A 1983a, p. E-
port ant tt.bi tat areas due t o E .3 .150l. •14). 3-525 u 1 ).
avoidance of construct ton
sites, access roads , icpound-
I
Possf.tl e controls on volUDe, speed and
aent c l earin g activities . and frequency of access ro:td t raffic (APA.
recr eational use o f t he area. 1983a, ?• E-3-534 •12).
Publ tc access to access r oad and air-
Hold proh!bitod dur in~ construction
(APA 1983a, p . E-3-534 "12).
Avoidance of t h o Fog L.1k .. nnd Indian
River areas by access r outing (APA
1983a, p . E-3-292 •141.
Di s cC'u r a geme nt of o ff·road recreational
vehicle activity, a nd phasing in of re-
ereational plan to limit recreational
impacts on vogotation and vUdli fo (APA
1983a, p. E-3-29 2 n16, 17).
(12) Broken ice and/or leo lapact not quantlfiod but not Continued study or boar habi-Colloct records of U.-Clearing of impoundoents prior to
s he l ving, open v ater i n the expected to bo signlficont tat use and movt>ments (APA. poundment crossings a nd flooding and roeova l o f floating dobris
t.pounct.nta, roads, and other (APA 1983a, Tab1o E.3.150l. 1984b, FY85 task 17). iapoundme:nt ·cau sed mort a 1· to reduce hazards to c rossing (APA
facUitioa uv block or hindor ity durinw open-water pe -1983a, p . E-3-530 •9).
access to hab ituall y used rlods (APA 1983a, p . E-3-
a real C e ·I · , aeaaonall )" used 524 #4).
feeding areaa).
(13) lncr oaae i n i n ter specific Impact difficult to quantify lnves tig3tions of bear move-Collect infomRtion on
COODpOt l t l on with and prodat ion (APA 1983a, table E. 3.150). me nts and mortalitv sour ces be.:~r populations and dis-
by br own bea rs and i n t r aspeci-are continu i n g (APA 1984b, tribution of bear han·est
fie competition amon g b lack FY85 Task 17). (APA 1983a, p. E-3-53~
bear s duri ng dispersal from 414 ).
illlpoundalon t zonos •
(14) Lover populati on sizos !~:~pact d ifficult to quantify, Oppor tuni sti c information on
and decr eased recruitur.t of but 1118)' affect nearby popula-disper sal in the c our so or
bears in the study a r ea ~y tions. aarked boar studios (APA 1984b,
resul t in fever subadults from FY85 Tas k 17).
the study a r ea available to
dis perse out to and populate
adjacent areas .
(l.S) Increase in IIOrt al!.tv of Destruction o f some black Sufficient !nforcation is Education progr .:u:s and s trict ~arba (l:e·
bears due to attr act ion t~ hu-bears likely during construe· a vailabl e for impact assess-cont:-ol measures a nd enforcec~en t to
aan refuse, revegetat ed areas tion phasos (APA 1983a, p. mont and mitl~ation planning. p r e\·ent c reation of nuisance nn ic.a.ls
near construction s ite s , and E-3-427, table E.3 .1<n ). No studies a re planned . (APA l983a , p . E-3-535 •15).
increases tn huaan/~r en-
COW"'ter s, resulting i n de-Planning a nd develcpme nt of an environ-
struction of the "offendintt mental briefinRS program for oll Hold
bear ". personnel (APA 1983a, p. E-3-292 •lll.
Pa~e 28
(I) (tl) (III) (IV) (\') (\'l)
Affected Potent ill I "Pact On~ins Propoaed Proposed
Specht or ltopact Aases58eflt and Phnned Monitoring Mit l ~atlon
Croup lleehmi• StatUI Studies Activiti es ~asures
(F ) Black (16) Greater suoceptibUity of Hunting mortality can be re-Sufficient infol"'lltion II Collect infomation on Use e f project facilit ies or equipment
Bear habituat ed bears to hunting gulated, although i ncreased available for lllpact assess-bear populations and dis-by e.::ployees and families for hunting
(cont.) and poaching I'IOrtality. poachin& losses uy represent Hnt and •itigation plmning. tributton of bear harvest and :upping will be rolliblted (APA
an unavotdab le adverse ~act No studies are planned. (APA 19S3a, p. E-3-S34 1983a, p. E-3-S34 "14 .
IAPA 1983a, Yable £.3.150 • '*14).
I f r.H:ded, recC~~CDer.dations for restric-
tions to hunttn~ regulations to re~uce
hunt !"~ pressure 'APA 1983a, p. E-3-534
~14 ).
(17) Disturbance froe aircraft Impact not quantified, but not Sufficient Information Is Aircraft will mal"taln "'1r!Jow:l altl-
overflights NY dilrupt normal expected to be significant avall3ble for impact asseaa· tudes of 1000 ft above ground level
feeding, reatlng and denning (APA 1983a, Table £.3.150). ~ent and mitigation planning. durl r.~ !lights (APA 1983a, p. E-3-Sll
activities. No studies are planned. u 10).
(C) Wolf (1) Pen:>anent loss of l!!!rtlons I=;»act represents an absolute Continued studies of wolf pack Collect lnfo,.,.tion on
ol territories ol at least s t.x habtt.at losa for wolves, but slus and distributions (APA wolf populations throu@h-
packs . is unlikely to affect local 1984b, FY85 Task 28). out construction and into
wolf populations. \Oolf num-operation (APA 1983a, p.
bers are currently highly E-3-525 •17).
regulated by trapping and
removal for IE)e unagement
pu~ses (APA 1983a, p. E-3-
431, Table £.3.151).
(2) Inundation of parts of lzcpact vt 11 occur over the Continued stud les of wolf pack Collect lnfo,.,.tlon on
ranses of six packs will cauae short tera, wtlen ungulate prey sizes and distributions (APA wolf populations through-
upheaval of the historical populations are also under-1984b, FY85 Task 28). out construction and tntc
distribution of packs due to ~Ina shifts; effects are not operation (APA 1983a, p.
associated socill strife. expected to be significant E-3-525 •7l.
(APA 1983a, p. E-3-431, Table
E.3.151l.
( 3) Reduction of carrvlnt Impact not quantified (APA Co ntinued studies of wolf pack Collect tnfomatton on Is:pac t s f r om decreased prey •vallabll-
caeacitv ol 11tolves aue to re-1983a, pp. E-3-430 and 431 , sizes and dis tributions (APA wot f populations through-lty to \o'Olves should be reduced b~ mea-
auction ol 11001e tan<l otfier Table £.3.151). 1984b, FY85 Task 28). out construction and into sures ~o miti~ate tcpac.ts to ungulate
prey) camlna capacities. operation (APA 19!3a, p. populations (APA t983a, p. E-3-536
Studies of 1100se calf DDrtal-E-3-525 ~7). n6l.
l ty and of wolf predation
during a severe winter (APA Habitat enhanc8en': measures for aoose
1984b, FY85 Tasks 9 and 10). In &.e :>lddle basin and on replacment
lands :o compensatE !or perNnent !'labi·
tat less (APA 198j•, p. E-3-527 <>6).
(4) Increase In wolf numbers Short-term beneficial Impact Continued s tudies of wolf pack Collect Information on Ir.:poundt~ent clearing will not begin
near the I"PPUndment zones due (APA 1983a, p. E-3-431, Table sizes a nd distributions (APA wolf populations through-until ~ or 3 years before filling;
to d isplacettent of .oose £.3 .151). 1984b, FY85 Task 28l. out construction and into patches of vegetation wi ll be left
caused by lepoundment clearing operation IAPA 1983a, p. until ~ust before :nun, (APA 19@:!3,
activities . E-3-S25 •7). p. E-!-525 •1).
(5) Presence of the 1Jopound-Impact not quantified (APA Continued studies of wolf pack Collect records of t.-Cleorlng of lmpound:>enta prior to
Hilt and clu facllltlea uy 1983a, Table E.3.151l. dlstr1~ut1ons (APA 1984b , FY85 poundllent cross in@.• and floodln1 and reiiOVal of floating debris
hinder IIOVeooent of ..-packs Task 26). l•poundunt-caused mortal-to rtc!uce hazards to crossing (APA
to caribou and 1100se calving lty durin~ open-water 1983a, p. E-3-530 .,g ).
areea. period (APA 19B3a, p . E-
3-524 "4).
Pa~e 29
(I) (Ill (Ill) (IV) (V) (VI)
Affected Potential !Jopact OniJOtnc Propoaed Proposed
Species or lJopact Asaes..-nt and Planned ~ltorin& !litigation
CrOUJI ltechan1• Stnu. Studies Activities Mea au rea
(Cl ~lf (6) Wolves aay uM the acceu lleneHclal l-et not ~rtl· I.,act severity not sufficient
(cont.) ro.d to their t>enef1t when Hed; not expected tc be str to require s tuc1y.
hW\tlng unplate prey. n!Hcant (APA 1983a, Table
E.J.1Sll.
( 7) Open voter dovnstree f r ooo l a:pa ct not ~ntlfied; M t Continued studies of volf pack
the daas aay hinder .:we.cents expected to be stcnlftcant dlnrlbut lons (APA 19841>, FY!5
of wol ves. CAPA 19834 , Table E.J .151). Task 28).
(8) Increased 110rtall~ of Hunttns of volvea can be re· Sufftc!en t 1nfon:ation 11 Use ~: p roject facilities or equtpant
wolves aue to fiuntrn •• 2!!•ch-plated, but increase<~ poach· avallable for t..pact aaae aa-by r.:ployeea and faD IIIes for hunt t ng
Ina , ana trappinR. ina louea aay represent an unt and Dittaatlon planntna . and :rawtn& viii be rohibited (APA
unavoidable adverae t.ap..ct No srodtes are planned. 198Ja, p . E·J-534 al4 •
(APA 1983a, p. E·J·485 and
518, Table E.J .151). 1! needed, rtc~ndationa for restrtc·
tiona to hunttna regulation• to reduce
hunti ng p r essur e (APA 1983a, p . E·J-534
.o]l,).
(9) llolvea a re likely t o avoid $"""' h abituation vill likely Continued studies of volf pack Collect tnforcatlon on den Crou".d activity v i ii be prohibited
artu of intense huaan acttv-occur; l8pact not expecte d to distri bution• (APA 1984b, FY85 loutlons throuchout con· vith L~ 0.25 alles of known active wolf
tty {e.a., e:onstn:.ction areas) be aicniftcant (APA 198Ja, p. Task 28!. atruction (APA 1983a, p. dens o r rendezvous sites betVH:n 1 ~y
or heavy road t r a ffic , at E·J·4JO, Table E.J.151). E-3·524 •6l. and 31 July I APA l983a , p . E·J-"2
leut Initially. 410 ).
Possible controls on volume, speed and
fre~~ency of acceu road traffic (APA
1983a, p . E·J·534 •12).
(10) Disturbance of wolves by lD!pac t not quantified (A PA Continued studies of wolf pack Collect lnfonnation on den Aircroit vill maintain minlr:tum alti·
hwsan activ ities or aircraft i~~~~ht E·l-430, Table distributions (APA l984b , FY85 locations throughout c on-tudes of 1000 f t above ground level
a t den sites could lead to pup Task 28). structton (APA 1983a, p. durto~ overfll~ta CAPA 198Ja, p. E-3-
IIOrtallty 1f the dens are E·3·524 06). 5Jl u10),
abandoned during the early
weeks of a pup's life. Aircraft land tngs will be prohib ited
vithlo 0 .25 01 U ea of known active wolf
dens o r rendezvo us sites during 1 May
to Jl J uly (APA l99Ja, p. E·J·5ll 410).
Ground a ctivity viii be prohibited
vithln 0.25 •lles of known act ive volf
dens ~r rendezvous s ites between 1 ~y
and :1 J uly (APA 198Ja, p . E·J·5Jl
¥10).
Plar.ntn~ and deve lo~t of an en vi-
rom:ental brieflnat prosr~a for all
flel~ penonnel CAPA 1983.1, p. E·J-292
•U l.
(lll Wolvea aay habituate to Deatructton of tc.e nuisance lapact s everity not suffici ent £ducat ion procru. and atrict csrbar;e·
b...an use areas and have the valves uy occur 1f aitl&atlon to requi re study. control •aaurcs and enforctMnt to
potential to becc.e nuisance •••urea are not enforced {APA preve nt creation of nuisance aninals
antaah, increaslns the like· 198Jo, ~· E·J·IoJO, Table (APA !98Ja , p. E·J·5J5 •15).
lihood of de•truction of the E .J.1Sl , howver, thla tapact
"offendtnc volf". Ia unlikely to be aicniftcm~t
l n theae heavily exploited
wolf I>OI'Ulationa.
(1) (lll (111) (IV) (V) I Vt)
Affected Pountt.l Iotpact Ongoing Proposed Proposed
Specteo or lotpaet Aasess~~ent and Planned Honltoring Hit!~ation
Croup Meehan in Status Studies Activities ~asures
(C) 1/olf (12) Dioturbance •~ den sites I•pact not quantified (APA Continued studies of wolf pack Collect i nfomation on den Publ ~c use of Kcess road and airfield
(cont.) fr~ increased access for re-1983a, ~· t-3-430, Table distributions (APA 1984b, FY85 locations throughout cor.-pr~.!b ited dur i n~ construction ( APA
creational activities c ould t.3.1S1 . Task 28). structlon (.IPA p. E-3-5 2• 1953•, p . E-3-534 •12 , 14).
lead to IJU1> 110rtallty if dens •6l.
are abandoned du.rtng early Disc:ura~;eaent of offroad recreational
....,ka of a pup's llfe. \'et:icle .ttth•it )', and phastns i n of re -
c:-eat ~ona l pl.tn :o ll~tt recreiltionat
lapae<s on vegetati on and w!I Gl!fe ( .IPA
198:a, p. E-3-292 •16-17).
(H) 1/ol verine (1) Pen:oanent loss of winter Winter habitat for severo 1 Opporwnistic collection of
lora!!i! Fi a61t.at aue to ilr volvertnea vU 1 be lost; chan · data durin@: vol! surveys.
poun tl. au in aoveeents t dens 1 ties
and productivity will affect
surrounding populations IAPA
1983a, p . t-3·432 to 433,
Table t .3.l51).
( 2) Secondary loss of small Difficult to predict whether Iepact severity not sufficient
.... t and arouse prey bases. lncreaaes ln ungulate carrion to require study .
Changes in prey density will availability vill offset
affect -u, population loues of aaller prey (APA
denlitiu , and productivity. 1983a, ~· t-3·433, Table
E.3.152 •
(3) T011p0rary increaae ln lmp.~ct repreaenta a short·terr.t Impact severity not sufficient
availability of prey in areas beneficial effect (APA 1983a, to require study.
adjacent to t..poundment clear-Table E.3.1S2).
tna zonea.
(4) Increase in carrying capa-Impact represents • small but Impact severity not s ufficient Selective clearin;. in the transmission
city of t he transmiasion cor· beneficial effect on wolver· to require study. corri dors, permtttins seral vegetation
ridor for 0100se and ptarcl ~an inee (APA 1983a, Table up to 10 ft in height (APA 1983a, p.
may benefichlly i"'l'act wol-E.3.1S2l E-3-;26 •4l.
verines.
( 5) Increase in 110rtalitv due Impact not quantified but Sufficient information is lf nee<!e d, recoc:cendations for restrtc-
to li untlna1 tra22lnl!1 ana likely the 1110st illportant ill-available for impact .useas· tlons to hunting and trapping regula-
poach ins. pact on vol verines. Hunting ment and mltigtation planning. tions to reduct h&rvest preuure (APA
and trapping can be regulated, No studies are planned. 1983a, p. E-3·534 •14).
but poachin& uy represent an
unavoidable adverse Impact Use o f project facilities or equipment
(APA 1983a, p. E-3•486, Table by t :ployees and !acilles for hunting
E.3.152). and t rapping wi II be rohibited (APA
1983a , p. f.-3-534 •14 •
Pub l !c access to access road and air·
fiel~ prohi~!ted durins c<'Dstruction
(APA t98 3a, p . E-3-534 #12, 14).
(6) Disturbance -habitat Iapact will be •i•ilar to Opporwnistic collection of IllpO\lndllent clear in& wt 11 not besin un-l011 'ue to ~t c[e.ar-(K)(1) and will occur 1-2 data during wolf suneys. til ! or 3 years before filling; poe-
na v ii at.,acevoverlnes , years prior to t..pound<lent ches of vegetation wU 1 be left until
P!rticularlx in Vlnter. Hllins (APA 1983a, Table just before fillin& (APA 1983a, p . t-
E.3.lS2l. 3-S25l.
l
Page 31
(1) (11) (Ill) (IV) (V) (VI)
Affected Potential I mpact Ongoing Pr oposed Proposed
Species or I mpact Assessment and Planned Monitoring ~litigation
Group Meehan is• S t at us Studies Activities ~easures
(H) '~olvertne (7) AI teration of uoe patterns Conflicting data on home range Opportunistic c ollection of I (cont.) due to presence of the to-boundari es of wolverines and data during wo l f surveys.
poundments and changes in hoM terra!n features Nke this l.m -
range bounda riel. pact difficult to predict; not
expected to be s ignificant
(APA 1983a, p. E-3-432).
(8) Avoidance of all areas of tcpact not quantified ; not ex· Opportuniatic collection of Pos~ible controls on vol ume , speed and
h111111n activity (including ac-pected to be significant u n-data durin& wolf surveys. fre~uency of access road t r affic (APA.
cess road during heavy traffic less high levels C'f recrea· 1983a, p. E-3-53~ ul2).
periods and areas vith high tlonal di sturb~nce occur (APA
levels of recreational acttv-~~~~~s2t E-J-486, Table Public access to access road and air-
ity), at least Initially, fie ld proh!bitec dur!na construction
causing sotee chan1es in use fAPA 1983a , p. E-3·534 1112).
patterns o r preclusion of u se
in some areas. Dtscouragetnent oi off-road recreational
vehicle activity , and phasing 1n of re-
creational pl an to U11it recre ationa l
imp•cts on vegetation a nd vUdlife (APA
l98~a, p. E-3-292 "16-17).
(I) Belukha (1) Water teeperature changes Water teeperatures will not Impact severity not sufficient Use of mu l tilevel int3ke structures on
at t he .,outll of the Sus!tna chanae s!anif!cantly at t he to require study. the ~a:ns to air.tain downstream r i ver
River due to the project uy r iver mouth; impact not expec-te~perature s as close to normal as
affect calv!na. ted to occur (APA l983a, p. possitle (APA H~3a , p . E-3-526 t5).
E-3-433 ).
(2) Food suppl!es o f belukhas Salmon decreases would at aost Impact s everity not sufficient Impacts from decreased prty availabil-
may be decreased due to alter-be 5-s-. of Sua!tna river to warrant further s tudy. !ty w!ll be rect~f!ed by 11easures to
at!ons or blockage in the stocks; impact not expected to mit!~ate impacts :o salmon populations
ava!labil!ty of spavn!na ~e s!gn!fic~nt (APA l983a, p. (APA ~983a, p. E-3·536 n 6).
streams for sal11011 . E-3-434).
(J) lynx (l) Pemanent habitat loss due Impac t v!ll r esult In loss of Continued surveys of furbearer
to i.ll~dments. habitat for probably all lynx distribution v!ll Improve 1m-
(a fev animals), v!thtn the pact assesSIM!nt and citilation
middle basin (APA l983a, p. planning (APA l984b, FY85 Task
E-3-440 to 442). 26 , sub task 1).
( 2) Loss of habitat in tm-Short-term Impact that will Continued s urveys of furbearer Impo~ndmen t clear~ne wi ll not begin
poundment areas due to clear-precede habitat loss due to distribution will i mprove 1m-unt!! 2 o r 3 yea:-s before filling;
ing operation s. lr.>pc,ndment filling (APA pact assessment and mitigation patc~es of vesetation will be left
l983a, Table E.3.157). planning (APA l984b, FY85 Task unti! just be fo~e !!ll!ng (APA 1983a,
26 , subtaak 1). p. ~-3·525 #ll.
( 3) loss of forest habitats Impact will result i n loss o£ Previous studie.l have provided Selective c lear!:-:.@ in the transaisston
due to the transmission corri-3831 acres of forest habitats sufficient !nfon~~at!on for corridor, pemitt!ng seral vegetation
dora. useful to lynx (APA l983a, iJil)ICt a1sessment. No further up to 10 ft In height (APA l983a, p .
Table E.3.86). studi~s are p l anned. E-3-~26 •4).
~l!nio lz e toss ar.d alteration of habi-
tat, particular!:: less abundant habi•
tats and sensiti•:e wildlife habitats
(APA l983a , p. E·3·291 to 292 fl·lll.
Pa~e l2
(1) (Ill (Ill) (IV) (V) 'I"!)
Affecte<l Potential l"!>OCt On&olng Propose<! Prcposed
Species o r Iorpac t AssesSDent and Planned ~.onitortng !'!it ~~a tion
Croup llechantsa Statu.s Studies Activities ~!ea su res
!
( 4) Loss of habl tat due to (J) Lynx Re:e:oval of 3,341 acres of Previous studies have provided I ReveRetation and :ertillZat ton oi dis·
(cont. l borrow sites and other areas spruce forest habitats. Re-sufficient inforaation for :urbed sites (APA l9Sla, p. £-l-52 6 •ll
that will be reclai-. Vt@:ttat ion will probab \ "! not lapact assesseent. ~lo further v ill ~rovtde sooe :oraginlt habitat
return habitat to spruce ca~~-
mun!t tes during the license
studies are planned. prior ':O forest Sl.!cce sston .
peri od (APA l98la, Table
F..l.l57l.
(5) lmpound010nts v iii blc ck RediStribution of h 0111e ran su Th is 11111act IIIOChantsm vill re· Clearing of f..alpou"dcents prior to
movements and impede dispersal to confon:1 to impoundment
of lynx. shores will occur (A PA 198la,
Table E.l.l5i),
cei ve further attention during flooding and removal of fl o ating debris
i mpact 3ssesamen t reftnements to r educe hazards to c r ossing ( APA.
(APA l9B4b, FY85 Task 5l. 1983a. p . £-l-530 u9) vtll aid ~!sper-
sal but will not cocpletely miti gate
barri er effects.
(6) Increaae in the inci~ence Ic:pact not quantified but not I1111act severity not sufficier.t Collect mo rtalitY data on
of road kil11 due to p resence expected t o be significant to requir e further study. road and railroad colli·
of the access corrido r . (APA 1983a, Table t.l.l57l. sions (APA l98la, p. £-)-
525 •ll.
(7) Increase in .or-taltt .. · due I Hunting and trapping can be Surveys of trappers are con· Uae of proj ect hctl ities o r equipoent
to hun.tlnc , trapp£ns 1 ana resulated. but poaching losses tinuing to doctment current by eeployees and fa.:~ii.ies for huntlna
poach ina. cay represent an unavoi dable harvest levels (APA 1984b, and :rapping wtll ~e rohibited f APA
adverse U:!pact (APA l98la, FY85 Task 201. 198la, p. £-J-5):. •14 .
Tabd £.3.157),
t f needed, reco:~:endatlons for restric-
tlor.s co hunting and trapping regu la·
tions to reduce harvest pressure (APA.
l98la , p. £-3-S):. ul4l.
(8) Avoidance of SOliN! areas Lynx are uncommon and v11 1 be This i Cit)act mechanism will ~taj co~ ~round 3ct!::1ty will be pr ohtbt -
near i n ten se human activit i es able to avoid developed areas. r eceive· fur t h er attent ion ted ~ear sen sit!.ve wildlife areas dur-
(e.g., con•t ruction zones) due Not expected to be a signtfi-dur i n g impact assessment !ng senotttve per!ods CAPA l98la, p.
to disturbance. cant tm~act (APA 198la, Tab le reftnments (APA 1984b , FYB5 E-l -53! flO).
E.l.l5i • Task 5l.
Pr ohil.l ition o f access during construe·
I tion, d 1tcourager-e~t of offroad recrea-
tior.a.t vehicle acti"lity, and phasing i r:
of r ecreational ;:!an to lil'it recrea·
tiona l impacts on \"egetation and wUd·
ltfe f ~PA 198la, r• £-l-292 ,'15·11).
IKl Coyote (1) Incruae in coyote populo· lmpact represents a beneficial Continued surveys of furbearer
tion uy occur nur developed effect on c oyotes (APA l 98la, distribution, inc l ud i ng dovn-
areas. p . E·l·439l. stream areas, wi ll docU~~ent
chanRI!S in coyote populations
(APA l984b, FYB5 7ask 26 , sub·
task ll.
(Ll Red Fox ( 1) Habitat alteration• due to liiJlaCt represents • beneftcbl l"Pact severity no t sufftc!en c Reve<etat i on and !ere lllzation of dis•
t.,Duodaent clearing and re· effect on foxes (APA 1983a, to requi re further s tudy. turto~ site• (APA l 983a , p. £-l-526
c l aimed l and s vill increase Table E.l .lS6l. •ll.
prey avatlabtl tty.
(I) (II) (III) (tV) (V) (\•I)
Affected Potent tal tmp•ct Ongoin R Prcposed Pre posed
Species or lllplCt Assess~nent and Pl anned !lonitoring Hit~~~tion
Croup Meehan 151ft Status Studies Activities ~easures
(Ll Red Fox ( 2) Open water downstrez:. may Ir.p.act not quantified but not Impact sever ity not sufficient Cse of Cl.llttlevel ~ntalt.e structures on
(cont.) hinder mov~ts in v tnter. expected to be significant to require study. the du.s to u intli:: dovnstreu river
(APA l98la, Table £.3.156). tesnperatures as c!ose to nol"U.l as
~ossibl• (APA l983a, p. E-3-526 •5l.
( )) Increase !n oortalit•: C::ue Hunting •nd tn pptn~ c.an be Surveys of trappers ~re con· t:se of pro!ect fac ~ 1 !ties or equtpoent
to Fiunttns 1 tra22ins 1 ane reiN l a ted, but poaching losses tinuing to docu.nt current by e~loyees ar.d fa:ilies for hunting
poaching &.ly represent an unavoidable harvest levels (APA l984b, and trapping will ~· rol>ibited (APA
ad·,•rs• I.Jlpact (APA 1983&, p . FY85 !ask ZOl. l983a, p. E-3-534 "l~ .
E-l-439, Tabl • £.3.156).
If needed, rec.c::~CZe:":dAtions f or restric-
tions to hunting ar.d trapping regula-
tions to reduce harvest pressure 'J.PA
l983a, p. £·3·534 n l4).
(4) Habituation of fox•• to May represer.t ,a.n important h:-This t.mpact mechanism will re-Education prt"'g racs and strict ~rbage
tnaan presence eay lead t o pact on local fox populations ceive further attention duri n~ control measures •r.d enfo rce~nent to
increase in mortality due to (APA 1983a, p. E-3-440, Table impact asses51Mnt refinements prevent creation ef nuisance ant.J:als
destruction of proble~~ E.3.156). (APA 1984b, FY85 Task 5). (APA l983a, p. E-l-135 015).
animals.
( 5) Abandonment of some d•n Some negative effects uy oc· Surveys of fox den use in Co llect lnfon:.atlon on !ox ~ajor ground actl·:i:y will b• prohibi·
sites ma:y occur due to h\Can cur but habituation to human areas of potential impact den locations throughout ted near sensitive wildll fe areas dur·
disturbance. activities is very likely; im -(APA 1984b , FY8S Task 26, construction (APA 1983a, ing s•nsitive periods ( APA 1983a, p.
pact not eJ~Cpected to be signt-subtask 3). p. £-3-524 •6). E-3·532 •10).
ficant (APA 1983&, p . E-3-439;
Tob l• £.3.1~6).
(:1) Beaver ( 1) Permane nt loss of habitat lr.poct Is of ::1inor signiH· Beaver Cilche surveys .:tay be Develooment of do· .. ~stream beRvttr carry-
ior a few beaver due to ic-cance to .1rf'a populations due extended to lnc lude t h e 1.m-ing cnpacity mod el to yield better L.m-
poundments and other pern:anent to the small nw:bers affected poundment zones to confirm pact predictions a:-td refinements to
facilit i ••· (AP A 1983a, Table E .3.153). numbers of beaver affected nitigation measures (APA 1983a, ?· £-
(APA 198~b, FY85 !as~. 18, sub-3·537 •18).
I
task 1l.
Enhancement of s l c-.:ll\s downstrenr.: f rom
D•v ll Ca nyon (APA :9S3a, p. E·l·SJ7
"19).
Page 34
(l) (11) (Ill) (tV) (V) (VI)
Affec tl!d Potential Iorpact Onsoing Proposed Proposed
Spe<:les or Iorpact Asses58ent and Planned Moni t orln& Mitigati on
Croup llechanl .. StatU8 Studies Actlvltles !'teasurea
(H) Beaver C 2) Lou of s.-habitat for Iotpact 1s of otlnor slanlfl-Previous surveys have provided Collect Information on llab ltat loss vlll be alnil:llzed bv side
(cont .) both species due to slltatlon cance to a rea populations due sufficient lnfor&atlon for beaver dlstrlbut ion In borrcv techniques for road conacTuc·
of ponds, alteration and to the saall nuober s affected lapact assesSMnt. "o further De-.n Creek and In down-tl<'n, spoU deposition I n lapoundcents
dratnase patterns, and distur· (65 beaver) (APA 1983a, pp. work ls planned. streUI floodplain (APA o r depleted borrow a reas, and consol i ·
bance near access roads and E-3-434 to 436, Table 1983a, p . E-3-525 #Sl. dat lc" of project facU it lea (APA
borrov pits (pr iarlly In the E. 3.153). 1983a, p . E-3-526 •2l.
Deadun Creek area).
~!odl!icationa of borTow requ lreaents
and techniques to n t n imize loss o£
habitat £or aquatic f urbeare r s ( APA
1983a, p. E-3-536 n17).
Devel opment of do\o'TlStream beaver carry·
l ng capacit y model to yield better 1,-
pact predictions and refinements to
r.>itlgatlon measures (APA 1983a, p . f.-
3-537 •18).
'Enhancement of slou~s downstream froa
Devil Canyon (APA 1983a, p . E-3-537
"19).
~ant:1tze \oas of fores t areaa thrcu~
alllf"Ctnt of access road and transots·
sion corridor, and other eeasur es (APA
1983a, p. E-3-539 •23).
~inlaize loss and alterat ion of habi·
tat, ;>a rticularly l ess abundant habi·
tats and sen slth·e ._.ildllfe habitats
CAPA 1983a, p. E-3-291 to 292 •1-lll.
Design and alignment 11easures tc "In!.-
olze lopacts on wetlands (APA l983a, p.
E-3-292 ~18, 19).
( 3) Increased wi nter flews 1 lcpact r epr esent s a bene£1cinl Add iti onal Information wlll be Co llect data on changes !r. Development o f downstrerun beaver c3rry·
s t a bitlz eCI llows 1 and I~ck of effect on beavers and wi 11 obtained f rom down stream hy· downstream vegetative !ng capacity model to yield better !m-
Ice cover vUI Sener[t SeavP r probab l y c ompensate for losses drologic and vegeta.t ion model· cover (APA 1983a, p . E-3-pact predictions and refinemen ts to
downstreiUD. due to the impoundments and l ng (APA 1984a, Aquatic FY85 523 t2). mltloatlon measures (APA 19e3a, p . E-
other fac Ulties (APA 1983a. Task 4A ; APA 1984b, FY85 Task 3-53i u18l.
p . E-3-434 to 436, Table 15). Collect information on
E.3.l53l. beaver distribution in Enh ancement of s l oughs downstreac from
Efforts to reftne the beaver Dea dman Cr eel< •nd In the Devil Ca nyon (APA :983a, p. E-3-537
population IIOdel and Held dovnstre3lll floodplain (A?A ••19).
s tudies to provide lnfor&atlon 1983a, p. E-3-525 •8>.
for IIOdellng v ill continue
I APA l984b, FY85 Tasks 18, 19
and 20).
(4) Oovnstr...,. daUy flow Shot"t ·tera flow fluctuations Infon:>ation froa lce--ellng Developee:n t of dovnscreu beaver carry-
fluctuations aav freeze out or i n winter are not anticipated efforts is being incorporated !ng capacity IIOdel to yie ld better Ia-
flood beaver lodges and/or to be of • magnitude detrleen-in the beaver 110de 1 (APA pact ?r e dtctlons ar.d re finements to
food caches tn vinter. tal to beaver survival (APA 1984b, FY85 T3sk 19). nit!~ation measures (APA 1983•• p. !-
1983a, p . E-3-469). 3-S37 ul 8).
Page 35
(I) (11) (lit) (IV) (V) (\'1)
Affected Potent h i Impact Ongoing Propo1ed Pro posed
Species or Impact Assesntent and Planned Monitoring 11!tigation
Croup Meehan is• Status Studies Activities ~easu res
(!1) Beaver ( 5) Increase in mortal it\' due Hunting and trapping can be Surveys of trappers are con-Use of proj ect facilities or equipment
(cont.) to huntlns, trapping, and regulated, but poaching losses tinuing to document current prohibited to employees and hmll !es
poach ina. N.Y represent illn unavoidable harvest levels (APA 1984b, for ~.unting and trappina (APA 198la, p .
adverse impact (APA 198la, p. FY85 Task 20). E·l·Sl4 ol14).
E·l -436, Table E.l.15ll.
tf needed, rec0ftle4!ndattons for restrtc-
tions to hunting and trapping regula·
tions to reduce harvest pressure (APA
198la, p. E·l-534 ul4l.
(N) Muskrat (1) Pemanent lou of habitat Ir.pact is of minor sian if i-Enhancement of slou~hs downstream from
for 5·10 muskrats due to !m· cance to area populations due Devil Canyon (APA 198la, p. E-3·537
poundments and other per."".anent to the small numbers affected "19).
facilities. (APA 198la, Table E.l .1Sl).
( 2) Loss of some habitat fo r lc:pact is of minor sianUi· Previous surveys have provide d Habitot loss will be minimized by side
muskrats due to siltation of cance to area populAtions due sufficient inform.ation for borrov techniques !"or road construe-
ponds, alteration of drainage to the small numbers affected impact assessment. No further tion, spoil deposition i n impoundments
patterns, and disturbance near IAPA 198la, pp. E·l·4l4 to work is planned. or depleted borrcw area:i , and consoli-
access roads and borrow pits •:.~. Table E.l.15ll. dation of pro ject :acilities (APA
Cpri~:~arily in the Deadllan 198la, p. E-3-526 "2).
Creek area).
~odiftcations of borrow requirements
and t echniques to minimize loss o£
habitat for aquatic furbearers (A PA
198la, p. E-l-536 u l7).
Enhancement o f s l oughs downstrellll fro11
Dev11 Canyon (APA 198la, p. E-3-537
#19).
Hinitlize loss of forest areas through
ali@r--:~ent of access road and transmis-
sion c orridor, and ether measures (APA
198la, p. E-l-5Jg "23).
Mininize loss ar.C alteration of habi-
tat, part icularly less abundant habi-
tats and sensitive wildlife habitats
(APA 198la, p. E·l-291 to 292 •11·11).
De siil' and al igr .. ":ent measures t:o mini-
rr.ize !opacts on · .. ·etlands (APA 198 3a, p.
E-3-192 ~18, 19),
(l) tncre11ed winter flo"s, l01pact represents a beneficial Additional information w1!1 be Collect data on chRr.t;e s in Enhance:nent of s l oughs downstream from
stabirized llow~ and lacK of effect on muskrat and will obtained from downstream hv-downstream vegetative Devil Canyon (APA Hel>., p. E·l-537
ice cover will nefit a:uskrat probably compensate for losses drologic and vegetation mode l~ cover (APA 198la, p. E-3-~19).
downstream. due to the impoundments And in g. 523 #2).
other hcllities (APA 198la,
: p. E-3·434 to 436, Table
' E.l.15ll.
r,ge 36
(1) (Ill (III) (IV) (V) r•:I)
A ff~cted Potent131 I ~~~pact Ongoing Proposed Propos ed
Species or Impact Assessmen t and Pl~nne:d Monitoring Mlt!g•tlon
Croup Mechan ism Statu s Studies Activities ~easures
(N) Muskrat (4) Increase in mortalit:v due Huntin3 And trapptns can be Surveys of trappers are con· l!se of project fac1.11t1es o r equi~nt
(cont.) to 'huntina 1 crae2Ina1 ana regulated, but poachtn1 loases tinuing to doc~ent curr ent prohibited te" eeployees and faoiltes
poachlns. cay represent an un~votdable harvest level s (APA l984b, for hunting and trapping (APA l96la, p .
adverse 11rJtaC t ( A.PA 1983a, p. IT85 Task 20). E-3-534 •14).
E-3-436, Table E.3.l53l.
tf needed, recorr:rer.dations for restrtc-
tions -:o hunting &:"ld trappi:lR res;ula-
tions -:o reduce harvest pres sure (APA
1 983a, p . E-3-534 "14).
(0) River (ll Pc runent less of r barlon • Ellalnatlon of 86 •lies (138 '* Set aside othe!' l ands used by river
Otter and .1au.atic ri'ler otter ~.ab i -U) of uinstem river habitat otte:-to prevent f urther decline of
tats In die 2ro2osed i.c~cund-ar.d 39 •lies (65 luo) of strem otter habitat.
.-nt zones. habitat (APA 1983a, p. E-3-84
and 129).
• (2) ltablut alterations The total area of habitat Additional lnforcotlon vlll be • Collect data on chanses
dovnstre• of the impour.~-likely to be lost to otters obtained froa d~'Tistre .. hy-in downstream vegetat h ·e
eents. because of reduce d flows has drologic and vesetation stud· cover (APA 1983a, p. E-3-
not been determined (LCt 1985, les (APA 1984a, Aquatic FY85 523 •2l.
p. 2.15·7). Task 4A; APA l984b, FY85 Task
15l.
()) Habitat alteration and Shor t-term Impact affecting
teepo rary habitat loss due to the same populations affected
clearing forest and brush f r om by i~~~poundment filling. lm·
the impoundment zones. pact woul d occur 2-3 year s
prior to filling (APA 1983a,
table £.3.155).
• (4) Increased vater te::pera-* I .lcreased 'Jater temperature Additional infon::atlon viii be * Use of multtle\·e l intake structures
ture downstream from the 1m-would cause •lelayed ice for -obtained from downstream hy-on the dam s to maintain downstream
poundments affecting otter oatior·, a£f1.cting amount of drologic and vegetation stud· river temper atures as c l ose to pre-
habitat. aquati~,; h~~t~ttat usable, and les (APA 1984a, Aquatic FY85 proj ect temperatures as possible (APA
prey nwnbers and distribution task 4A; APA 1984b, FY85 Task 1983a, p . E-3-526 u5).
CAPA 1983a, p. E-3-llll. The 15).
net change ln avaUable habi -
tat or food availability has
not been determined.
• (5) Delayed spring ice • Spring Ice break-up In t he * l..nfomat ion frOCI ice·model·
break-up. mitigation would be delayed tng could be used to determine
a nd less severe . Continued 1:13gnitude of habitat altera-
ice cover vould reduce a110unt tlon (APA 1984b, FY65 Task
oi foraging habitats. Break· l5l.
up in side channels and
sloughs vould not occur, fur-
ther reducing availability of
s pring for aglnf habitat until
the tee 11elts APA 1983a, p.
E-3-90; LCL 1985, p.
8).
2.15-7 to
(I)
Affected
Species or
Croup
(0) River
Otter
(cont.)
... (11)
Potential
I "'Pact
!le<:hanin
• ( 6) Change in beaver numbers
dovnstre.., free the Ulpound-
eents and consequent effects
on otter habitat.
• (1) Changes in vater qual-
ity.
( 8) Permanent loss of habitat
to access corridors.
(9) Increased -.11 ,.....1
populations In recla!.JDed
areas.
(111)
1111J>aCt
Asaess.ent
Status
• Should project actions re-
sult ln increased beaver nwa-
bers, r esting and denning hab-
itats for river otters •ight
be increased. Probably would
not result in any appreciable
Increase In otter nuabers (LGL
1985, p. 2.15-8).
• llater turbidity dovnstre&ll
of the d .. s \IOUld be decreased
in SWIDer and Increased in
vinter from present condi-
tions, neither of which vould
be a significant Impact on the
ability of otter to forage for
available prey (LGL 1985, p.
2.15-8). 1/ater turbidity in
the impoun-n t s \IOU 1 d not be
expected to t.pact on the
ability of otter to forage for
available prey. 1/ater runoff
from fuel atorage facilities,
solid vaste disposal and the
construction v illage Is not
expected to reach vater bodies
because of construction de-
signs (APA 1983a, p. E-3-128).
• 1/ould result In oolnor loss
of habitat where routes cross
wetlands or stre&llls (APA
1983a, Tables E.3.20 and
E. 3. 21). Unless construction
changed or eliminated vater
c ourses, the impact would not
be important to river otters
CLCL 1985, p. 2.15-8).
• It is not likely that In-
creased sull ...-.1 popula-
tions as a result of reclai.ed
arus vould benefit otter pop-
ulations (LGL 1985, p. 2.15-
8).
(IV)
Ongoing
and Planned
Studies
• Additional 1nfortl8tion vill
be obtained fr011 dovnstream
h ydrologic and vegetation
studies (APA 1984a, Aquatic FY
Task 4A; APA 1984b, OY85 Tuk
15).
(V)
Proposed
!1onltoring
Activities
• Collect data on changes
in dovnstream vegetative
cover (APA 1983a, p. E-3-
523 #2). Collect informa-
tion on beaver distribu-
tion, abund•nce and over-
winter survival (APA
1984b, FY85 Tuk 18, s ub-
tuks 1 and 3).
(VI)
Proposed
Hit!gatlon
Measures
Page 37
* \.:ater for cacr and construction use
would be treated befo re discharge back
into the Susitna River. Ston:> drainage
and oily water runoff from the con-
struction camp vould be collected and
treated CAPA 1983a, p. E-3-128). A
Sp ill Prevention ContAinment and Coun-
ten:>easure Plan (SPCC) vould be deve l-
oped.
Habitat would be minimized by side bor-
row techni ques for road construction ,
spoil deposItion In impoundments or
depleted borrow areas, and consol ida-
tion of project facilities (APA 1983a,
p . E-3-526 02).
Modification of borrow requlr~ments and
techniques to minimize loss o f habitat
for aquatic furbearers (A PA 1983a, p.
E-3-536 t17).
Hinl.clze loss of forest areas through
align:ent of access road and transmis-
sion corridor and other measures (APA
1983a, E-3-291, 292 J l-11).
Hinl.cize loss and a 1 terat ion of habi-
tat, particularly less abundant habi-
tats and sensitivP "Hdlife habitats
(APA 1983a , p. £-3-291, 292 "1-lll.
Revegetation and fertilization of dis-
turbed sites (APA 1983a, p. E-3-526
nl.
(I)
Affecte.l
Speciea or
Croup
(0) River
Otter
(cont.)
., (11)
Potential
t.pact
!tech ani•
• (10) Lou of habitats used
by river otters for travel
routes .
(11) Increased otter ..,rtalltv
resultlng fr001 increased hunt
ina and trapplns pressure.
(12) Increased otter 1110rtallty
resul tins fr001 poach in g.
• (13) Increased otter IIOrtal-
lty res ulting fr001 collisions
of vlldl He and vehicles.
• (11.) Peraanent abandonment
of areas because of distur-
bance a nd harasswenc during
construction activities.
(111)
I.-pact
Asaes..ent
StatUI
Data not avallable to deter-
mine the nUIIber of otter ..,.
ing through the iapound"""t
area, or to quantify the ta-
portance of the d• aites to
traveling otters . I10pact not
likely to have an iaportant
iiOpac t on otter ..,....,ts (LCL
1985, p. 2.15-8).
* Increased access to the pro·
j ect area and increased huaan
population would likely result
In Increased trapping pressure
vlllch may caus• adverse !a-
pacts on the otter population
(APA 198la, "Iable £.3.155; LCL
1985, p. 2.15-9).
Illegal shooting and trapping
might increase vith increased
human population and access,
but vould probably not be an
important •dverse illpact on
the otter population (LCL
1985, p. 2 .15-9).
• Mortality cau sed by increas-
ed vehicle t r afflc vould be an
adverse impact , but not likely
to becOODe Important (LCL 1985,
p. 2 .15-10) •
• Otters vould Initially leave
construct ion areas because of
disturbance, but pe.-...nent
habi t ll-t loss vould prevent
otters froa occupying the a rea
inundated by the iapound~~ents.
Disturbance alon& access
routes would probably not
result in c010plete abandonment
of the area along those routes
(LCL 1985, p . 2.15-10).
(IV)
Onaotns
and Planned
Stucliea
Surveys of trappers are con·
tinuing t o doc.-nt cun-ent
harvest levels (APA 1981ob,
FY85 "I ask 20) •
• Impact severity not s u ffi-
cient to r e q uire study.
(V)
Propoaed
llonitoring
Activities
(VI)
Propoaed
1Utlgat1on
Measures
Pap 38
Use of project facilities or equip1100t
by sployees and futltes for hunting
and trapplrg vUl be prohibited (APA
1983a, p. E-3-534 lllol.
If needed, rec~ndations for restric-
tions to hunting resulations to reduce
harvest pressure (APA 198la, p . E-3-534
lllo).
• Lands selected to c010pensate for lost
vi1d1Ue habitat could be a source of
river otters that could colonize areas
vacated because of tncreued ..,rtalt~y
(LCL 1985 , p . 2.1 5-lll.
Major ground activity vill be prohibi-
ted near sensitive periods (APA 1983a,
p. E-3-532 •10).
Possible control s on volume, speed and
f r equency of access r oad traffic (APA
198la , p. E-3-5llo •12).
Prohibition of access during construc-
tion, discouragement o f o ffroad recrea-
tional vehicle activity, and phasing in
of recreational plans to l1•1t recrea-
tional 110pacts on vegetation and vild-
llfe (APA 1983a, p. E-3-292 •15-17).
(I) (11) (ttl) (IV) (V) (VI)
~
Affected Potential lllpac:t Onaoing Proposed Proposed
Species or lJopaet Assess~~e~~t and Planned Monitoring Miti gation
Croup Mec:hania Status Studies Activities !1easures
(0) River • (15) Permanent abandoreent * Increased recreat tonal use Prohibition o f access during construe:-
Otter of areas because of distur-of the waterwys contributing tion, discourag...,..nt of o ffroad recrea-
(cont.) bance and harasllleftt resulting to direct haras-nt and dis-tional vehicle activity, and phasing in
froe increased rec:reat tonal turbance of otters could cause of recreational plans to limit recrea-
use of waterways. otters to abandon areas vith-tional impacts on vegetation and wild-
out sufficient escape cover. life (APA 1983a, p. E-3-292 t15-17).
The importance of this pot en-
tial adverse illpact would de-
pend upon recreational u se
patterns (APA 1983a, p. E-3-
505; LCL 1985, p. 2.15-10).
(P) Marten (1) Permanent habitat loss due Impact will result in loss of • Previous studies provided
to lllpoundiDents . habitat for approximately 100 s ufficient information for
marten with in the middle basin impact assessment. No further
(APA 1983a, p. £-3-1,40 to studies planned.
1,42).
( 2) Permanent loss of soee I•pact will likely result in Impact severity not sufficient Habitat l oss will be minimized by side
liabitat lor marten aue to the redistribution of home ranges to require further study. borrow techniques for road construe-
access corriC!or . of affected furbearers (APA tion, spoil deposition in impoundments
1983a, ~-E-3-487, table or depleted borrow areas, and consoli-
1!:.3.157 • dation of project facilities (APA
1983a, p. E-3-526 t2).
Minimize loss of forest areas t hrough
align:>ent of the access road and trans-
mission corridor, and other measures
(APA 1983a, p. E-3-539 #23).
l11nicize loss and alteration of habi-
tat, particularly l ess abundant h abi-
tats and sensitive wildlife habitats
(APA 1983a, pp. E-3-291 to 292 tl-11).
(3) Loss of habitat in Short-term impact that will Continued surveys of furbearer Impoundment clearin g will not begin
impoundment areas due to precede habitat loss due to distribution will improve 111-until 2 or 3 years before filling;
clearing operations. impoundment filling (APA pact assessment and mitigation patches of vegetation will be left
1983a, table £. 3.157). planning (APA 1984b, FY85 Task until just before filling (APA 1983a,
26, s:.~btask 1) • p. £-3-525 tl).
(4) Loss of forest habitats Impact will result in loss of Previous studies have provided Selective clearing in the transmission
due to the transmission corri· 3831 acres of forest habitats sufficient i o1 formation for corridor, permitting seral vegetation
dors. useful to marten, (APA 1983a, tapact assessment. No further up to 10 f t in height (APA 1983a, p.
Table £.3.86). studies are planned. £-3-526 t4).
l1in l aize l oss and alteration of hab i-
tat, particularl)' less abundant habi-
tats and sensitive wildlife habitats
(APA 1983a, p E-3-~9 1 t o 292 n-11).
( 5) Loss of habitat due to RetDOval of 3341 acres of Previous studies have provided Revegetat ion and f ertilization of dis-
borrow sites and other areas s pruce forest habitats. Re-sufficient information for turbed sites (APA 1983a , p. £-3-526 t 3)
that vill be reclai~~ed . vegetation will probab 1 y not impact assess~~ent. No further wilt provide some foraging habitat
return habitat to spruce coe-studies are planned. prior to forest su cce s sion.
munit ies during the license
period (APA 1983a, table
£.3.157).
Page 40
(I) (II) (III) (IV) (V) (VI)
Affected Potential I mpact Ongoing Proposed Proposed
Species or I "'PAC t Assessment and Pl ann ed Monitoring Mitigation
Croup Mechani sm S t atus St udies Activities !'f.easures
(P) Mart en (6) I mpoundments vill b l ock. Redistribution of home ranges * Pr evious stud i.es have pro -Clearing of i.mpoundments prior to
(cont.) movements of ma r ten and impede to confonn to impoundment v i ded suffic tent in forma t ion flooding and removal of floatin g debr i s
dispersal. s~ores will occur (APA 1983a, for impact assessoent . No to reduce hazards to crossing (A.PA
Tabl e E.3.1 S7). further studies are planned. 1983a, p. E-3-S30 "9 ) will a i d disper -
sal bu t wil l not completely mit i gate
bar rier effects .
( 7) Open water downs t ream vi II Marten usually allgn home r r evtou s studies have provided Use of 111\lltilevel intake structures on
block movements of marten. ranges a l ong rivers and other sufficient information for the dams to main tai n do wns tream riv e r
water bodies. Impact not impact assessment . No further temperatures as close to nonna 1 as
expected to be significant work is planned. possible (APA 1983a, p. E-3-S26 4S).
(APA l983a , Appendix ElU,
Volume lOB).
( 8) Incr e a se in the incidence Impact not quantifi ed but not Impact severit y not sufficient Collect mor talit y data on
of r oad kills due to p r osence expected to be significar t to requir e further study. road and r ail road co 11 t -
of the access corridor. (APA l983a, Table E.3.1S7). sion s (APA 1983a, p . E-3-
S2S #1).
(9) Increase in mortalitv due Hunting and trapping can be Surveys of t rappers are con-Use of project fact lit tes or equipment
t o huntins1 traEEin&1 and r egulated, but poaching l osses tinuing to document current by ecploy ees and families for hunting
poachin g. taay represent an unavoidabl e har vest levels (APA 1984b ' and trapping will be rohibited (APA
adver se impact (APA 1983a, FYSS Task 20). l983a , p. E-3-534 n4 .
Tab l e E. 3 .157).
If needed, r ecc:x::nend at ions for r e str i c-
t ions to hunting and trapping regu l a-
t i ons t o reduce harvest pressu re (APA
1983a, p . E-3-S43 #14).
(10) Avoidance of some areas !1arten are unl L'kely to be Impact sever ity not sufficient Maj or ground activity will be proh t b t -
near intense h uman activities affected, or will be able to 1:0 require further study. ted near sensitive wildlife areas dur-
(e .g ., construction zones) due avoid developed areas. ~ot ing sen sitive periods (APA l 98 3a, p.
to disturbance. expected to be a s i gni ficant E-3-352 1110).
impact (1-.PA 1983a, T able
E.3.1S7). Prohibition of access during c o nstrue-
tion, discourager.e nt of offroad r ecrea-
t tonal vehicle ac tivity , and phasing i n
o f recreational pl an to l im i t recrea ·
tiona I impacts on vf!getation and wild-
life (APA l 983a, p . E-3-292 DlS -17).
(Q) Mink ( 1) Permanent habt tat loss du~ Elimination of a substant i al Distribution of f urbear e r s in
c o die im~undraen t s. port ton of good quality habi-t he do'Wilstream a r ea a nd t n the
tat (S3 miles of mainscem plus tmpoundmen t zones wi l l be
9. 7 miles o f stre am habita t) studied (APA l984b , FYSS Task
will occu r (APA l983a, p. 26, subtaslt l).
E-3-436 , Tabl e E .3.1SS).
( 2) Habitat loss due to lm-Shcn-tenn lmpact affe cting Distri but ion of f urbearers i n Impoun~.D<n t clearing will not begin
poundmen t c l earing activities the same populations a f fected the downstream area and in tht:: until 2 or 3 years before ftlltng;
and resul can t decrease in cov-by impoundment f!lllng. Im-trapoundmen t zones wi 1 1 b e patche s of vegetation will be l e f t
e r a nd pr ey availabillty. pact wi 11 occur 203 years studies (APA l984b, FYSS Tasl< until just befo re filling (APA l983a,
prior to fill l ng (APA l983a , 26, subtask 1). p. E.3.525 "1 ).
Table E.3.1SS).
(1)
Affected
Spedes or
Croup
(Q) "ink
(cont.)
(11)
Potent tal
~t
Mec:hani•
()) Habitat loss due to the
acc.es• corridor.
(4) Increase in saall -1
prey in reclat.ed a~.
(5) Increase in beaver popula·
tion, stabilization of water
levels, and open water dovn·
nre• vlll benefit alnk.
( 6) Increase in 11ortal1ty due
to hunting , trapping, and
poaching.
(7) Abando.-nt of habitat
near conatruction zones and
recreation areal due to huaan
disturbance.
(111)
J.pact
Assesl8eftt
Status
Proposed road route will re·
aove 12.3 ailes of stre ..
ahore habitats alons Oeaclaan
Creek (APA 1983a, p. E·3·1o38).
1h is l.llpact represents a bene·
flcul iapact to aink, al·
though bendits will probably
be of little significance (APA
1983a, Table £.3.155).
l'l:lpact represents a beneficial
effect on alnk (APA 1983a,
Table £.3.155).
Runt lng and trapping can be
regulated , but poaching losses
aay represent an unavoidable
adverse impact (APA l983a,
Table E. 3.155).
Effects would be aost notice·
able on the remaining habitat
areas along the upper reaches
of tributary creeks near the
l.llpounOJ:>ents (APA l983a, p.
E·3·1o38, Table £.3.155).
(IV)
Onp>ina
and Planned
Studies
Previoua stud lea provided suf·
ficient lnforaatlon for iapact
uaess.ent. No further stud·
lea are planned.
lllpact severity not sufficient
to require study.
Surveys of furbearer popula·
tlons and distribution in the
dovnstreaa area are planned
(APA 1984b FY85 Task 26, sub·
task 1).
Surveys of trappers are con·
tinuing to doc.-nt current
harvest levels (APA 1981ob FY85
Task 20).
lhis l.llpact aechani .. will re·
ceive further attention during
t.pact asses..ent reftnment
(APA 1984b, FY85 Task 5).
(V)
Proposed
!toni torlns
Activities
(Vl)
Proposed
"iUgatlon
~sures
Pap ltl
Habitat lou vU 1 be ainiJtized by side
borrow techniques for road construe·
tion, spoil deposition in ~nts
or depleted borrcv areas, and consoli-
dation of project facilities (AP A
1983a, p. £·3·526 •2).
11odiHcations of borrow requireaents
and techniques to ainlmize loss of hab·
itat for aquatic furbearers (APA 1983a,
p. E-3-536 nn.
"lnimize loss of forest areas through
aligncent of access road and transmis -
sion corridor and other measures (APA
1983a, p. E-3·539 t23).
"inimize loss anJ alteration of habi·
tat, particularly less abundant habi·
tats and sensitive wildli fe habitats
(APA 1983a, p. £·3·291, 292 •1·11).
Revegetation and fertilization of dis·
turbed sites (APA 198la, p. E-3·526
•3).
Enhanceaent of sloughs dovnstre• fr011
Devil C..nyon (A PA 1983a, p. E-3·537
t19).
Use of project facilities or equipaent
by employees and families for hunting
and trapping vill be prohibited (APA
1983a, p . E·3·531o n~o).
If needed, recoaaendations for restric-
tions to l:unting regulations to reduce
harvest pressure (APA 1983a, p. E·3·531o
tllo).
"-jor ground activity vill be prohibi·
ted ne ar sensitive wildlife areas dur·
ing senaitive periods (APA 1983a, p.
E-3532 nol.
Prohibition of access during construe·
t ion, d iacourageoent of off ·road re •
creattonal vehicle activity, and phu·
ing ln of recreational plan to Uait
recreationa.l impacts on vegetation and
wildlife (APA 1983a, p. E-3·292
•15·17).
Page lo2
(I) (11) (111) (IV) (V) (VI)
Affected Potential Iapact On go ins Proposed Proposed
Species o r lapact Au e s_,t and Planned Konitorinl !litigation
Croup llechani,. SUtWI Studies Actlvitlu Measures
(R) Weasels ( 1) Penunent habitat loss due "'-pact wUl r esult in l oss of Ccntlnued s u rveys of furbearer
to tapouniliiiints . habitat f o r appr oxlaately 5,. distri bution vUl Ulpr ove 1.8-
of t he population of weasels pact assess.ent and mi tigation
vithin the aiddle basin (APA planning (APA 1984b FY85 Task
1983a, p . t-3-lol.O to lo42 l. 26, subt.uk 1).
( 2) Penunent loss of habitat "'-Pact vill likely result in "'-Pact severity n ot sufficient Habitat loss will be ainl.8ized by side
lor wease t 3u.e to die a ccess redistr ibution of h.-r anges to require further study. borrow techniques for road construe·
corridor . of affected furbearers (APA tion , spoil deposition in 1.8pounclments
1983a, p. t -3-lo87, Tabl e t.3. or depleted borrow areas, and conaoli-
1 57). dation of project facilities (APA
1 983a, p. t -3-526 •2l.
Hiniaire l oss o f forest areu through
all~t of the access road and trans-
aisaion corridor, and other •aaures
(APA 1983a, p. t-3-539 123).
Hiniaire loss and alteration o f habl -
tat, particularly less abundant habi-
UU and sensitive vlldllfe habitats
(APA 1983a pp. t-3-291 to 292 tl-11).
( 3) Loss of habitat in i C>-Short·teraa llllpact that v ill Continued surveys of fur bearer I mpoundment clearing vlll not begin un-
poundment areas due to clear-p recede habitat loss due to distribution vlll i111prove liD -tU 2 or 3 years befor e fllllng; pat·
ing operations. llllpounclmen t filling (APA pact assessment and mitigation chu of vegeta tion will be left until
1983&, Table E.3.157l . p lanning (APA 1984b FY85 Task just before fUlln g (APA l983a, p.
26, sub task 1l. t-3·525 Ill.
(lo) Loss of fores t habitats l•pact vUl result in loss of Previous s t udies have provided Selective clearing in the transalssion
due to the trannission corri-3831 acres of forest habitats sufficient inforaaation for c o rridor, per.itting seral vegetation
dor s. useful to ""asels CAPA l983a, iatpact a ssesHJent. No f u rther up t o 10 ft in height (APA 1983a, p.
Table E .3 .86). s tudies are planned . E-3-526 flo).
Minimize loss and a l teration of habi-
t at , par ticularly l ess abundant ha bi-
tats and sen sitive vildllfe habitats
(APA 1983a, p. E-3·291 to 292 •1-11).
(5) Loss of habitat due to Re.>Val of 331o1 acre.s of Previous studies have provided Revegetation a nd fert ilization of dl.s-
borrow s 1 tes and other •reas spruce forest habitats. Re -sufficient infonut ion for turbed sites (APA 1983&, p. t-3-526 13)
tliat vUr se rectariie<l vegetation will probably not t..pact assessment. No furthe r vlll provide SOliN! foraging habitat
return habitat to spruce com -studies are planned . prior to forest succession.
munitles during the licen se
period (APA 1 983a , Tabl e E .3.
1 57).
(6) Impoundloents vill block Redistribution of home ranges This l.l>pact mechani .. will re-Clearing of 1.8pounclments prior to
IIOVeaents and Ulpede d 1 spersal to con f ono to 1.8pounclllen t ceive further attention during flooding and reeoval of floatins debris
of weasels. shores v ill occur (APA 1983a, loopact a•ses-nt reflneeent to reduee hazards to crossl.na (APA
Table E.3.157). (APA l984b , FY85 Task S). 1983a, p . E-3-530 19) will aid disper·
sal but will not completely aiti&ate
barrier effects .
Page 43
(I) .. (II) (lU ) (I V) (V) (VI)
Affected Potential I epact Ongo ing Pr oposed Proposed
Spec i es or I ~~Pact Au e sseent and Planned Moni t o r ing Mitigation
Group Hechani,. Stat us Studies Activities !'.easures
(R) Weaa e ls (7) Increaoe ln the inciden ce Impact not quan tified but no t I mpact severity not s u fficien t Collect 110r tallty data on
(cont.) of r oad k llls due to p r esence expect ed t o be slgnlflcant to requi re f u rther study . road and rallroad colll·
of the a c cess corr i dor. (AP A 1983a, Table £.3.157). slons (APA 1983a, E-3·525
tl).
(8) Open water d owns t reac wlll \;easels probably align home Pr evious s t ud i es have provided Use of mu l tllevel intake structures on
bl ock moveme nts of we asels. r~nges along rivers and ot her s u fficient l n fomatlon for the dams to mai ntain downstream river
water bodtes. I~~pact not e x· impact assessment . No f urther temperatures as close to nonnal as pos·
pected to be signi fican t (APA vork ls plan ned . slble (APA 1983a , p. E·l·S26 t5).
l983a, Appendix EllJ, Vo l u.
l OB).
(9) Increase ln 110rtalltv due Hu nting and trapping can be Surveys of trappers ar e con· Use of project facUlties or equipment
to hunting1 tra22In s 1 and r egulltec!, but poachi ng l osses t inuing to documen t c urrent by employees and fa~~llles for hunting
poach ins. uy represent an unavoidabl e harvest levels (APA 1984b, a nd t rapp ing wlll be ~rohlblted (APA
adverse impact (AjPA l98Ja, fYBS Task 20) • 1983a, p. E-3·534 #14 •
Tabl e E. 3.157).
If needed, rec011111endations for rest ric·
t l ons t o hunt i ng and t rapoing regul a·
tions to reduce harvest p1·essur e (APA
198Ja, p. E-3-534 fl4 ),
(10) Avoidance of ooee a r eas Weasel are unlikely to be af· * Impact severity not suffl· !l&jor ground activity will be pr ohlbl ·
near t n tenoe huun activities f e cted or will be able t o cient to requ ire f urther ted near sen oltive wildlife a r eas du r·
(e.g ., construction zones) due a void devel oped ar eas. Ho t study. ing sensitive periods (APA 1983a, p.
t o disturbance. expected to be a significant E· 3·532 tlO).
impact (APA 1983a, Table E. 3.
157). Prohi bition of access during construe·
tion, discouragecent of off·road r e-
creational vehicle activity, and phas·
i ng in of r ecr eat ional p lan to limi t
recreati onal i mj)acts on veget ation and
wildlife (APA 1983a, p . E-3·292 tlS·
17).
(S) Small (1) Permanent habitat loss due Habitats lost are sillilar to Previous studies provided suf· Selective clearing in t r ansmission cor·
!l&llllalS to i mr.;unaiiM!nts ana o t her p ro· those of birds I see Section ficient i n forma t ion for i mpact rldor, permitting seral vegetation up
!ect acllltles. (Z)(l) ). Norma lly rapid popu· assessment . No further stud· to 10 ft in height (APA 1983a, p . E-3-
l ati on t urnover rates and re· i es pl anned. S26 f4).
shuffling of ter ritories by
small ........ ts will minimize Mi nimize loss a nd alteration of habi·
illlledi&te Impac t s; however, tat, par ticularly less abundant habi·
long·tenn l oss of habitat will t ats and sensitive wildlife habitats
reduce overa ll populations (APA 1983a, pp. E-3·291 to 292 tl·ll),
(APA 1983a, p. £·3·461).
(2) I ncrease i n numbers of Impact repreaents a beneficial Impact severity not sufficient Select ive clearing in t ransmission cor·
cer tai n apecles i n revegetated e ffect on mos t small maa1111ol to requi re 1 tudy. rider , permitting seral veget ation up
areaa of r ecla!Jaed bo r row species (APA 1983a, p . E·J· to 10 ft in height (APA 1983a, p. E-3-
situ. 462). 526 f )).
(I)
Affected
Specieo or
Group
(S) Small
Halllnab
(cont.)
(T) Waterbirds
(11)
Potential
lll!pact
Meehan in
(3) Dioplacnent during 1m-
poundloent filling of ..,.u
.-als that have recolonized
disturbed areao in the im-
poundlllent clearing zont.
(l) Permanent loss of river
and stream habitats for water-
fowl, ohorebirds, dippers, and
k ingftshers due to impound-
ments.
( 2) Alteration of ohoreline
neoting habitats due to 1m-
poun-nt clearing and facil-
ity site clearing.
(3) Trannission corridor may
cross waterf~l nesting areas
or .,vn~ent corridors, result-
ing In diapl01cnent of breed-
ing birds (particularly trum-
peter swans) , or morta H ty due
to tranomiasion line .:olli-
sions.
(4) Increased 1110rtality of
gamebirds due to hunting and
poaching.
(Ill)
!~~pact
Alses....,nt
Status
temporary adverse i.rpact,
which resulted fro. a pre-
viously beneficial effect on
.. au 11an1al populations (APA
l983a, Appendix EllJ, Volume
lOB).
Numbers of birds affected have
not been estimated but ill!pact
is unlikely to have a major
population effect. Effects
will be greatest on riverine
species, particularly harle-
quin duck, cOIDOTI and red-
breaoted mergansers, opotted
sandpiper, semi -paluted
plover, and dipper (APA 198301,
pp. E-3·454 to 455).
Tell!porary impact; in 1110st
areas preceding iOipoundllent
filling by 2 to 3 years (APA
l983a, p. E-3-455).
lll!pact not quantified (APA
198301, p. E-3-496 to 497).
Hunting C311 be regulate.1 but
poaching losses may represent
an unavoidable adverse impact.
(IV)
Onsoing
and Planned
Studies
l•pact severity not sufficient
to require study.
Previous studies provided suf-
ficent information for ill!paCt
assess~~ent. No further vorl<
is planned.
Impact severity not sufficient
to require study.
Surveys of all affected areas
for trumpeter swans and nests,
including the transmission
corridor (APA l984b, FY85 Task
24).
lll!pact severity not sufficient
to require study.
(V)
Proposed
Monitoring
Activities
Collect information on
swan nest locations
throughout construction
(APA 1983&, p. E-3-525
flO).
(Vl)
Proposed
Mitigation
Measures
Pace 44
Impoundment clearing will not begin un-
til 2 or 3 years before filling; pat·
ches of vegetation will be left until
just before filling (APA l983a, p. E-
3-525 n>.
Habitat loss wil 1 be minimized by side-
borrow techniques for road constnk-
tion, spoil deposition in Ulpoun-nts
or depleted borrow areas, and cont ott-
dation of project facUlties (APA
l983a, p. F.-3-526 42).
Design and alignment measures co mini-
llize ill!pacts on wetlands (APA l983a, p.
E-3-292 #18, 19).
Major ground activity will be prohibi-
ted within C. 5 miles of waterbodies use
by swans viler. they are present ( APA
l983a, p. E-3-532 flO).
Design and alignr.>ent measures to mini-
•ize impacts on wetlands (APA l983a, p.
E-3-292 ns, 19).
Use of project facilities or equipment
prohibited to employees and families
for hunting and trapping (APA l983a, p.
E-3-534 •14).
tf needed, recOIIIDendations for restric·
tions to hunting regulations to reduce
hunting pressure (APA l983a, p. E-3-534
#14).
Paae 45
(1) (II) (Ill) (IV) (V) (VI)
Affected Poten tial lllpact Onaoing Proposed Proposed
Species or l llpaCt Assessment and Phnned Monitoring Hitig.cion
Croup llech..,i .. Status Studies Activities Measures
(t) llaterbirds (5) Avoidance by waterbirds of I•pact not qwont ified, but not Impact severity not sufficient Collect info mation on Aircraft vill maintain 11iniiiiUlll altl-
(cont.) area.s of intense huaan activ-expected to be significant to require study. s wan nest locations tudes of 1000 ft above around level
ity (e•l•• con stTUc t ion zones, (APA 1983a, pp. E-3-455 and thr oughout constr uction d u rlna flight " (APA 1983a, p. ~-3 -531
Impoundment clearing activl-491). (APA 1983a, p. E -3-525 nol.
ties recreational areas). no; APA 1984b, n"85 task
24). Aircraft vlll .. lntaln a 0.25 mile buf-
fer around lakes used by • ru~~peter
s wans during the nesting ,...,rlod (APA
1983a, p . E-3-531 #lOl.
Hajor ground activity vill be prohlbl-
ted within 0 .5 miles of vaterbod ies
used by swans when swans are present
(APA 198Ja, p. E-3-532 •10).
Prohibition of access during construe-
tion discouragement of off-road recru-
t i onal vehicle activity, and phasing in
of recreational plan to liait recrea-
tiona! impacts on vegetation and v!ld-
life (APA 1983a, p. E-3-292 •15-17).
(U) Bald ( 1) Permanent lou of 3 nest-Nesting location loss v ill af-Food habits and foragins ranse • Survevs of aiddle basin • Construction of artificia l nest sites
Eagle In15 l ocations an<! liuntins liab-feet 2-3 pairs of bald easles . o f bald eagles viii be stud-raptor nests and nesting for bald eagles (dependent on agency
[tat !or sara easles aue to Loss of hunting habitat vlll led. In format ion vi ll be used locations will continue to approval) are proposed to compensate
the tmpoundiDent . not be as important as loss of for mittgation planning ef-document use areas pr lor for the 3 nest sites lost by !nunda-
nest sites, because presence forts to help detenlline the co, during, and after con-tlon. A fourth nest site at the edge
of suitable nest trees is pro-optimal locations of artifi-structlon (LCL 1985, Sec-of the Impoundment vill be stabll i zed
bably more lil:litins (APA clal eagle nests (APA 1984b tion 3.4). to pr event damage by moving ice or
1983a, pp . E-3-443 to 451; LCL n"85 task 21). other factors a nd establishmen t of al-
1984; LCL 1985, pp. 2.20-1 to ternate artificial nest sites nearby Is
3). planned (LCL 1985, Section 3.4).
(2) Loss of 3 nesting loca-Loss viii affect 2-3 pairs of * Surveys of middle basin * Curt~il~nt of clearing operations
tions ol bald eaaiesdue to bald eagles but viii be short raptor nests and nesting vlthln 0.5 mile radius of nests within
[m~unaiiient cleadns . term, pr tor to permanent loss locations will continue to the il:lpoundment zone prior to Impound -
as described in U-1. document u se areas prio r ment filling (l.Cl 1985, Section 3.4).
to, during, and after con·
struction (LCL 1985, Sec-* I1tplmentatlon of artificial nest
tion 3.4). site citlgation 11easures (if approved).
Se e a~ve in U·l.
( 3) Loss of nest sites and ha-Impacts not quantified, but Impact sever ity not sufficie't
bitat a l teration due to secon-not expected to be significant to require study.
dary lapacts of erosion, blow· (APA 1983o, Append lx E1U,
downs, etc., on forest vegeta-Voluae lOB).
tlon.
(4) Detrimental impacts en Proposed miti!lation of Impacts Surveys of bald easle nest Impacts from decr eased prey availabil-
salmon :>nd other fish prey in to salmon should also lessen sites in downstream rt.aches ity should be reduced by measures to
downstream a r eas could affect Impacts on bald eagles. Not are planned and vi 11 provide mitigate Impacts to salmon populations
bald eagle habitat quality. expected to be slsnificant baseline population data for (APA 1983a, p. E-3-536 H6l.
(APA 198Ja, Appendix ElU,
'lolusoe lOB).
future monitorlns studies
(APA 1984b, n"85 Task 27).
(t)
Affected
Species or
Croup
(U) Bald
Eagle
(cont.)
(II)
Potentbl
Il!p<IICt
Mechanis•
(5) Increase in electrocution
of bald eagles on transcission
towers.
(6) Potential abandonment of 2
bald eagle nests due to dis-
turbance alons access corri·
dors.
(1) Potential abandon~~~ent of
bald eagle nests along the
transmission route due to
diSturbance.
(III)
I ~~pact
Assess~~ent
Status
Impact difficult to quantify.
Selected tower and line con-
figuration for perunent
transmission line lS unlikely
to c1use electrocution. Elec-
trocution may occur on 34 kv
constr~ction transmission line
if used (APA 1983a, p. E-3-
497, Table £.3.159; LCL 1985,
Section 3.4).
Nesting locations are within
0. 5 mile (to rail road) and
just beyond 0.5 mile (access
road) of nests.
I111pact not completely quanti·
fled, but not likely to affect
bald eagles.
(IV)
On&<>ing
and Planned
Studies
Previous studies provided suf-
ficient inforution for illlpact
aases-nt. No further stud·
ies are planned.
Surveys to identify bald eagle
nest sites along the proposed
transmission corridor are
planned (APA l984b, fY85 Task
21).
(V)
Proposed
Monitoring
Activities
Surveys of 01iddle basin
raptor nests and nesting
locations will continue to
document use areas and
potential disturbance
effects prior to, during,
and after construction
(LCL 1985, Section 3.4).
Surveys flown prior to line
construction will identify
any newly established nest
sites which may be located
within the corridor (APA
1984b, fY85 Task 27) .
(VI)
Proposed
Hiti&ation
Hea1ures
Pap 46
Pole-line configurations and possible
perch guards to avoid raptor electrocu·
tion will be used on penoanent trans-
mission lines (APA 1983a, p. E-3-539
#22; LCL 1985, p. 3.4·8). Use of
die:sel generators for power sources
during construction NY el illlinate
electrocution potential on temporary
line (LCL 1985, p. 3.4·8).
The Denali Hlgllway·to·Watana access
road was realigned to avoid (remain 0.5
miles distant froo) the vicinity o f
nest 8E·6, the reco....,nded distance to
avoid disturbance illlpacts (APA 1983a,
p. £·3·537 no, Fig. £.3.81; LCL 1985, !
Section 3.4). The railroad route can-
not be realigned to avoid nest 8E·8
beyond 0.25 miles . Placement of arti-
ficial nest structure farther away from
the railroad will be done if distur·
bance effects occur (LCL 1985, Section
3.4).
Curtailment of construction acti vities I
during the sensitive (nesting) period
in the vicinity of active nests will
also occur (LCL 1985, Section 3.4).
Present route has taken into constdera·
tion known bald eagle nests and wU 1
remain at least 0.5 miles from nest
sites (LCL 1985, Section 3.4).
(I)
Affected
Spec:iea or
Croup
CUl bld
Eagle
(cont.)
(V) Colden
Eagle
(It)
Potential
I~~pac:t
Meehan in
(8 ) Inc:reaae in disturbance
due to aircraft traffic, con-
struction activity and recrea-
tional activity that 1s fac:ll-
itated by increased access.
(l) Permanent l oss of 5 nest-
ing locations of &Olden eagles
due to the tapou..-..u.
(2) Increase ln electrocution
of golden eagles on transais -
sion t~rs.
(Ill)
I!lpac:t
Aasesaaent
Status
I•pac:t not quantified but uy
caus e abandmwent of nests or
nest failure (APA 1983a, p.
E-3-4Sl to ~54, Table E.3.
159).
11111 result in loss or dis-
placeaent of 2·3 pairs of
eagles (LGL 1984, p. 7).
Impact difficult to quantify.
Selected tover and line con-
figuration for permanent
transaission line is unlikely
to cause el~ctrocutlon. Elec·
trocut ton may occur on 34 kv
construction transmission line
lf used (APA l983a, p. E-3-
t.97, Table E.3.159; LGL 1985,
Section 3.4).
(IV)
Onaotna
and Planned
Studies
* Surveys of aiddle b a sin
raptor nests and ne!ting loca-
tions will contince to docu-
.aent use areas pr ior to, dur-
tns, and after construction
(LCL 1985, Section 3.4).
Previous studies provided suf-
ficient lnforaatlon for i11pact
assessment. No further s t ud-
ies .a.r ..: planned.
(V)
Propooed
11on1tor1n&
Activities
Collect lnfo....,tion on ac-
tive raptor nest locations
throushout construct ion
(APA 1983a, p. E-3-525
19).
(Vl)
Proposed
111tigat1on
Measures
Paae 47
Aircraft vtll uinuin •tnt.. alti-
tudes of 1000 ft above aro\11\d level
during flishts (APA l983a, p. l-3-531
110).
Aircraft landings w111 be prohibited
within 0.25 •Hes of active bald eagle
nests between 15 !'~rch and 31 August
(APA l983a, p . E-3-531 110).
RAptor protection criteria (LGL 1985,
pp. 3.4-2 to 3).
~nges in facility siting or aligncoent
OT in construction schedules to avoid
disturbance to raptor nest sites (APA
l983a, pp. E-3-5l3 no, including spe-
cific measures for specific situ).
Public access to access road and air-
field prohibited during construction
(APA 1983a, p. E-3·534 112, 14).
Discourag-nt of off-road recreational
vehicle activity, and phasing in of re-
creational plan to llllit recreational
impacts on vegetation and wildlife (APA
1983a, p. E-3-292 116·17).
* Construction of artificial nut sites
on nearby cliffs for golden eagles are
proposed to compensate f?r loss of
nesting locations (APA l~83a, p. E-3-
538 and 539; LGL 1985, AppendiJ< Al.
Hunting habitat exists mainly a.t eleva-
tions above the iDpoundments and w111
not be affected.
(1) (11) (111) (IV) (V) (Vl)
Affected Potentul apact On&Olna Pr0110aed Pr0110aed
Speclu or 1-Pac:t Aues-..t and Planned Monitorlna ltltiaatlon
Cr oup llechanla Statua Studles Activitiu Heaaurea
(V) Colden ()) Effective lo .. of nesting • Total of 14 nestina loca-• Surveys of •lddle baoln • CurtaU•nt of clearlng operatlona
Eagle location• due to dlsturbance tlons .re ln areas aubject to raptor nesu and nesting loca-vl.thin 0.5 •lle of any active nesting
(cont. l at borrow pits, near cle:arin& potential dlsturbance effects tiona v lll continue to docu-locations durin& the sensitive (nest-
activities, and along the ac-(LCL 1914, pp. 2 to 4). Dls-11ent use areaa prlor to, dur-lnal perlod vtll occur (LCL 1985, Sec:-
cesa corridor. turbance effects at nen C£-18 lns, and following construe-tion 3.4).
cay occur vlthln 0.5 •lle of tion (LCL 1985, Section 3.4).
the nest sites and vlll con-* Curtail•nt of soee barTow excavation
tinue through ope rat ion phases actlvities at affected pits during the
due to the presence of the sensitive period may be necessary • or,
transatssion cor-ridor, road, lf t.practical, construction of alter-
bridge, and d4111 sl te (LCL nate artificial nes t sites ln ne.rby
1985, Section 3.4). area• to compensate for effective nest
loss due to disturbance (LGL 1985, Sec-
tion 3.4).
• Construction of alternate nest
site(s) for GE-18 a.y be necessary if
disturbance effects are anticipated
(LCL 1985, Section 3.4).
(4) 1ncrea"" in disturbance t.pact not quant Hied but aay Collect information on ac-Aircraft vill ulntaln alnlJoua alti-
due to aircraft traffic, con-cause aband01111ent of nests or tive raptor nest locations tudes of 1000 ft above ground level
struction activity and recrea-nest failure (APA l983a, p. throughout cons truction during flights (APA l983a, p. E-3-531
tiona\ activity that is facil-E-3-451 to 454, Table E.3. (APA 1963&, p. E-3-525 nol.
ltated by lncreaaed accesa. 159). •9).
Aircraft landlngs vlll be prohibited
vithin 0.5 •Hes of actlve golden eagle
nests between 15 !larch and 31 August
(APA l093a, p. E-3-531 flO).
!Yptor protection criteria (LCL 1985,
pp. 3.4-2 t o 3).
~naes ln facU l t y slting or allgnaent
or in construction schedules to avoid
disturbance to raptor nest sltes (APA
1983&, pp . E-3-533 flO, including spe-
cHic e>easures for specific aitesl.
Publlc access to access road and air-
field prohibited durlng construction
(APA l983a, p. £·3-534 •12, 14).
Dis c ourage"~aent of off-road recreational
vehicle activity, and phaslng in of re-
creational plan to lial t recreational
impacts on vegetation and wildlife (APA
1983&, p. E-3-292 416-17).
(W) Gyrfalcon ( 1) Possible loss of a nest lng Recent s urveys found no suit-Adherence to rap t o r pro tect lon criteria
location due to borrow site K able nesting habitat for gyr-will be maintained (LCL 1985, pp. 3.4-2
and d1sturb4nce fr0111 the falcons vlthin 0.25 mile of to 3).
trana•ission corridor. the borrow s ite or the t rans-
mission corrldor (LCL 1985,
prep. l.
ln
(1)
Affected
Species or
Croup
(W) Gyrfalcon
(cont.)
(X) Pe regune
Falcon
(Y) Other
Raptors
and lt.ven
(II)
Potential
l~~pact
!lechanisa
( 2) Potential abandontoent of
several raptor and raven nests
or nesting locations Cinclud·
ing a perearine falcon nest)
due to h\DUn activities alons
the tranl•ission corridor.
( 3) Increase In disturbance
due to aircraft traffic, con-
struction activity and recrea·
tiona! activity thlt is facil-
itated by increased access .
(1) Potent ial aban dot110ent of a
peregrine falcon nesting loca-
tion due to disturbance along
the transmission corridor.
(1) Pei"'D&&lent loss o f nesting
locations and ford!!fit< habitat
due to t~e ~n . ts, ac-
cess roa , Trow sites, and
o*er peru.nent pr oiect fach-
[t es.
(III)
l10pact
Aaaes.-ent
StatUI
l10p1ct not c010pletely quanti-
fied but will affect 2 I}'Tfal·
con neotina locations if con-
struct ion activitie• occur
during nest site attendance
periods (APA 198la, pp . E·3-
lo52 to '-54, Table £.3.159).
Impact not quantified but uy
cause abandonaent of nests or
nest failure (APA 1983a, p.
E-3-451 to '-54, Table £.3.
159).
* Nest s1 tea reported to be
within the transmission cor-
ridor near the Nenana River
crossing at Nenana are not
suitable for nesting pere-
grines according to a l981o
survev of the area. One his-
torical nesting site is within
l.lo eiles of the proposed
route (LCL l98S, in prep.).
Coorplete quantification fo r
all raptors and ravens l s not
possible but will affect nor-
thern goshawl<, sharp-shinned
hawlt, red-tailed hawl<, ~~erlin,
great h orned ovl, northern
haW.·ovl, boreal owl , c~
raven and posaibly AOrthern
h a rrier. great aray owl and
short-eared owl.
(IV)
On so ina
and Planned
Studies
Surveys to look for and deter-
aine use of raptor nest sites
alons the transaission corri-
dor (APA 1984b, FY85 Taalls 2'-
and 29).
Previous studies have provided
sufficient infol"'!!at ion for
illpact assess-..nt. No further
vorl< Is planned.
(V)
Proposed
11onitorina
Activities
Collect infol"'!!ation on ac-
tive raptor nest locations
throushout construction
(APA 1983a, P. £·3·525
•9).
Co llect inforaation on ac-
tive raptor nest locations
throughout construction
(APA 198lA, p. E-3-S25
~).
Surveys to d ocument use of
po tential nest sites near
the transmiss ion corridor
are planned through con·
structlon and operation
phases (APA 1983a, p.
E-3-S25 o9; LCL 19115, in
prep.).
Paae 49
(VI)
Proposed
11itiaation
Meaaures
Raptor protection cr1teri1 (LCL 1985,
pp. 3.4-2 to 3).
0\anaes in facility sitina or alicn-ent
or in construction schedules to avoid
disturbance t o r anter nest situ CAP A
l983a, pp. E-3-537 •20, E-3-533 •10).
Aircraft w111 uintaln •in!Joua alti·
tudes of 1000 ft above ground level
during flishts (APA l983a p. £·3-531
•10).
Aircraft landinas wt ll be prohibited
within 0.25 •Hes of active gyrfalcon
nests between 15 February and 15 August
(APA 1983a, p. E-l-531 elO).
Raptor protection criteria (LCL 1985,
pp. 3.4-2 to 3).
Changes in facil tty siting or alicn-nt
or in construction schedules to avoid
disturbance to raptor nest sites CAPA
1983a, pp. E-3-533 •10, Including spe·
cific Deasures for specific sites).
Public access to access road and air-
Held prohibited during construction
(APA 1983a, p. E-3-534 *12, 14).
Discouragement of off-road recreational
vehicle activity, and phasing In of re·
creatlonal plan to limit recreational
l.mpacts on vegetation and wildlife (APA
l983a, p. E-3-292 •16-17).
Adherence to raptor protection criteria
will be maintained (LCL 1985, pp. 3.4·2
t o 3 ).
* A sect ion 7 consultation (Endange red
Species Act 1973) vith the USFWS will
be c onducted to ensure protect ion of
the historical nesting site (LCL 1985,
in prep.).
Changes ln facility siting or alignment
or in construct !on schedules to avoid
disturbance (APA l983a, p. E·3·S37 no,
Appendix 3. I).
* Protection of forested land on c011·
pensatlon l.a nds and c reation of open-
ings for 1100se browse will protect nest
sites and provide foraging habitat for
raptors, althoush SOllie absolute loss of
habitat (particularly for resident
species) will prcbably occur as a r esi -
dual i10pact (LCL 1985, in prep. l.
(I)
Affected
Species or
Group
(Y ) Other
Rap tors
and Raven
(cont.)
(II)
Potentl..al
I~~pact
llechanlsa
(2) Lou of nest sites and
fona:ln& habl tat due to Im-
poundment clearing.
(3) Lou of nest sites and ha-
bitat alteration due to sec-
ondary illpacts of eroslo~,
blowdovns, etc a• on forest
vegetat ton.
(4) Potential abandor.ent of
raptor or raven nests or nest-
Ing locations due to human ac-
tivities along the transmis-
sion corridor.
(5) Increue In disturbance
due to atrcr~ft traffic, con-
struction activity and recrea-
tional activity that Is facil-
Itated by Increased access.
(Z) Terrestrial (1) Permanent habitat los s due
Birds to the illpound~Wnts and o ther
peraanmt pro1ect facilities.
(111)
Iapact
Asse.ssaent
Status
I•pact vill preceed eventual
penoanent loss by 2-3 yean
(APA 1983a, !able E .3.159).
Impacts not qu.antH!ed, but
not expected to be significant
(APA 1983a, Append!>< EllJ,
Volume lOB).
Ic:pact not quantified but not
expected to be important (tGL
1985, In prep.).
Impact not quantified but uy
cause aband~nt of nests or
nest failur e (APA 1983a, p.
E-3-451 to 454, Table E.3.
159).
Loss of ,.5,688 acres of habi-
tats used by ov< r 100,000
birds, resulting In possible
l oss and displacement of
b reeding, •!grating , and rest-
dent birds (APA 1983a, pp.
E-3 -,.56 to 459, Tables E.3.165
and 166; APA 1983b).
(IV)
Onsotn&
and Planned
Studies
Previous stud les have provided
sufficient Information for
iapact assesnent. "o further von Is plaMed.
Iapact severity not s ufficient
to require study.
Surveys for trumpeter swan and
bald eagle n ests along the
trans11tsslon corridor will
also take note of obvious
nests of other species (APA
1984b, FY85 Task 2").
Planned survevs of vtnter bird
use of the lmj,oundment zones
vtll illprove illpact asses..,..nt
and aitlgat!on planning ef-
forts (APA 1984b, FY85 Task
25). Nwobers of birds affec-
ted vi 11 br revised following
completion of vrgetatlon maps.
(V)
Proposed
l!onltorln&
Activities
Collect lnfonoatlon on ac-
t ive raptor nest locztions
throughout construction
(APA 1983a, p. E-3-525
~).
(VT)
Proposed
Mitigation
!'leasures
Page 50
l•poundment clearing vill not begin
until 2 or 3 years before filling (APA
1983a, p . E-3-538).
Realignment of the transaisalon corri-
d o r may be poss lb lr In order to avoid
known raptor nest sites . Clearing of
the transmission corridor will probably
improve hunting opportunities for most
species (tGL 1985, In prep.).
Aircraft will maintain alnillull alti-
tudes of 1000 ft above ground lrvel
during flights (APA 1983a, p. E-3-531 nol.
Raptor protrctlon criteria (tGL 1985,
pp. 3 ... -2 to 3).
Changes In facility siting or a! !gru>e~t
or in construct ion schedules to avoid
disturbance to raptor nest sites (APA
1983a, pp. E-3-533 •10 , Including spe-
cific measures for specific sites).
Public access to access road and air-
field prohibited during cons truction
(APA 1983a, p. E-3-53" #12, 1 .. ).
D!scourag1!111ent of off-road recreational
vehic!e activity, and phasing in of re-
creational plan to limit recreational
impacts on vegetation and wlldltfe (APA
l983a, p. E-3-292 1116-17).
* Impoundment clearing v U l not begin
until 2 o r 3 years before filling; pat-
ches of vegetation v lll be left untll
Just before filling (APA 1983a , E-3-525
•ll, and clearing requirements for many
project facll!tles vlll be reduced (APA
l9983a, p. E-3-253).
* Protect:ion of forest l ands and pro·
posed habitat compensation lands vtll
brnefit forest-!nhabltating birds and
provide some COOipensa t lon for further
loss o f bird habitat (tGL 1985, pp.
2 .26-ll to 17). Species preferring
s hrub or tundra habitats vlll probably
not be severely affected.
Page 51
(I) (It) (lit) (IV) (V) (VI)
Affected Potential brpact Ongoing Proposed Proposed
Species or l•pact Assess.ent and Planned Monitoring Mitigation
Croup Hechant• Status Studies Activities Measures
(Z) Terrestrial (2) Alteration of h;tbitats for A prel iJrinary est!Jiate of Previous studies provided suf· Selective clearing in tranS11isslon cor·
lltrds birds due to the traMmission 10,515 acres Indicates that f1cient infonrat ion for iJrpact ridor, penoitt ing sera 1 vegetllt lon up
(cont.) corridor. habitat for over 2000 breeding assessaent .. !1\llllbers of birds to 10 ft In height I APA 1983a, p . E·3·
birds vi 11 be affected (APA affected v lll be revi oed fol· 526 •4).
1983a, p. E·3·490; APA 1983b, loving completion of vegeta·
Tables E.3.79, 80, and 86). tion ups. Hlniclze loss of forest areas through
allgr.<:ent of trans:::tsslon corridor (APA
1983a, p. E·3·5 39 :23).
H!nblze loss and alteration of habi·
tat, particularly less abundant habt·
tats and sensitive wildllfe habitats
(APA 1983a, pp. E·3·291 and 292 #l·lll.
I
I
• (3) AI teration of forested • Alteration of 4, 752 acres of • Previous studies provided I • Revegetation and fertillzati on o!
habitats for birds due to bor· habitat "Ill occur (APA 1983b, sufficient infonoatton for teo-disturbed sites will rectify so.., ef·
I row sites, c~~~~ps, and vtl-Tables E.3.83 and 84). pact assessment. Estiaates oi fects (APA 1983a, p. E·3·526 •3>.
I ages . nUIIIbers of birds affected v lll
fol101o1 ca.pletion of vegeta· * ~ir.i.:Jize alteration of less abundant
tion ~t<~ps. habitats and sensitive vtldllfe a reas
(APA 1983a, pp. E·3·291 to 292 , U·lll.
(4) Increase in breeding habi· lcopact represents a beneficial Impact not sufficient t o re-Collection of data on
tat for s ome species due to effect on coast birds (APA quire study. changes in downstream
vegetation encroachment on 1983a, p. E-3·459). vegetative cover (A.PA
downstream river floodplains. 1983a, p . E·3·523 •2>.
(5) Loss of nest sites and ha· • lcopact not quantified but Impact severity not sufficient
bitat alteration due to sec· not expected to be sl gnifi· to require study .
ondary effects of erosion, cantly widespread to affect
blowdowns • etc. • on forest bird populations (APA 1983a,
vegetation . Append lx EllJ, Vo 1 ume lOB) .
(6) I ncrease in coorta llty due • Impact difficult to prevent Impact severity not sufficient
to collisions vtth transmts-and population loss is predic· to require study.
ston 1 ines and towers. ted to be Insignificant (APA
1983a, p. E-3-497).
( 7) Avoidance of areas of In· Impact not quantified (APA Impact severity not sufficient Proh !bit i on of access during construe·
tense human activity (e.g., 1983a, p. E·3·4&0), but not to require study. tion, discouragement of off·road r e cre·
construct ion zones, I.JDpound· e•pected to be significant for ational vehicle activity , and phasing
ment clearing activities, re· coast spec tes. in o f recreational plon to limit r~cre-
creational activities) due to actor:al icopacts on vegetatio n and wild·
disturbance. life (APA 1983a, p. E·3·292 0 15·17).
LITERATURE CITED
Alaska Pcwer Authority. 1983u. Before the Federa~ Energy
Regulatory Commission. Application fo ! license for
major project. Susitna Hydroelectric Pro~ect. Exhibit
E. Anchorage. 13 volumes.
Alaska Power Authority. 1983b. Responses to FERC supple-
mental information request of April 12, 1983. Filed
with FERC July II.
Alaskn Power Authority. 1984a. Susitna Hydroelectric
Project. Draft aquatic plan of study. Fiscal year
1985. Doc. no. 591. Prepared for Alaska Power
Authority. Anchorage.
Alaska Power Authority . 1984b. Susitna Hydroelectric
Project. Draft terrestrial plan of study. Fiscal
year 1985 . Doc. No. 1110. Prepared for Alaska Power
Authority. Anchorage.
Alaska Power Authority . 1984c . Susitna Hydroelectric
Project . Draft social science program study tasks.
Fiscal year 1985. Prepared for Alaska Power Authority.
Anchorage.
LGL Alaska Research Associates, Inc. 1984. Su~ary Statement
on ~est Lo s ses and Conflicts for Bald and Golden Eagle s
in the ~usitna Hydroelectric Project Area. Report to
the Alaska Power Authority. Anchorage.
LGL Alaska Research A~sociates, Inc. 1985. Susitna Hydro-
electric Proj ec :, Mitigation Plan for Wildlife and
Botanical Resources . Report to Alaska Power Authority.
Anchorage.
Miller, S.D. 1983. Susitna Hydroelectric Project. Phase 11
progress report. Big gaoe studies. Vol. VI . Black
bear and brown bear. Alaska Department of Fish and
Gace. Anchorage.
Miller, S .D. 1984. Susitna Hydroelectric Proejct. Draft
Phase 11 progress report. Big game studies . Vol. VI.
Black bear and brown bear. Alaska Department fo Fish
and Game. Anchorage.