11 2 c- appendix c - govlink · 2017. 11. 7. · appendix c wria 8 pressures assessment during the...
TRANSCRIPT
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1
APPENDIX CWRIA 8 Pressures Assessment During the Plan update process, the WRIA 8 Technical Committee (TC) estimated the intensity of the most important known sources of human-caused stress to Chinook salmon and salmon habitat in the WRIA 8 watershed. This “pressures assessment” was based on current scientific research and local knowledge of conditions in each habitat used by Chinook salmon. The pressures assessment rated the scope, severity and irreversibility of each important stressor to Chinook salmon at each life stage and habitat component for both WRIA 8 Chinook populations. These ratings were entered into a regional conservation planning tool (Miradi) to create a summary that constitutes the judgement of the TC on the relative impacts of each stressor to Chinook salmon in the watershed.
The WRIA 8 pressures assessment began with the list of 47 stressors developed by the Puget Sound Partnership as part of the effort to create a common regional ‘language’ for Chinook and Puget Sound Recovery (PSP, 2014). As part of what was known as “Phase 1” of a PSP-led Monitoring & Adaptive Management process, the TC first classified each stressor on a scale of 1-5 (5 denoting the highest negative impact). With a few exceptions, stressors that were classified below 2.5 in the 2014 assessment were not carried forward for further prioritization. A few others, noted below, were combined to simplify the assessment. This initial filtering and combining process reduced the total number of stressors subsequently assessed to 35.
The TC concurrently developed a life-cycle based conceptual model, and incorporated that knowledge into the pressures assessment by considering each stressor in relation to each life stage of both populations. This approach is somewhat aligned with WDFW’s approach to managing species based on life stages and life-cycle modeling in the Columbia Basin and elsewhere. With this approach, estimates of impacts were focused on the specific locations used by Chinook salmon in WRIA 8 during the specific times and life stages Chinook occupy them.
Next, the TC reviewed the links between stressors and components (Chinook habitats and life stages for each population), and rated the impact of each stressor on each component. The pressures assessment rated each stressor/component pair low, medium, high, or very high in terms of scope, severity and irreversibility according to regional definitions (see below). (If a stressor was hypothesized to have no impact on a particular life stage, the component pair was not rated.) Note that a score of low or medium is not meant to convey that the pressure is unimportant, but rather that relative to other pressures, it is not the most widespread or severe for that life stage.
Life Stage Components Used for RankingsThe following life stages match those identified in the conceptual model, which represents the basis of TC assumptions and working knowledge of Chinook in WRIA 8. The two WRIA 8 Chinook populations were rated separately due to their different experiences in the watershed.
Migration - Cedar population (returning adults)
Migration - Sammamish population (returning adults)
Spawning - Cedar population
Spawning - Sammamish population
Incubation and emergence - Cedar population
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
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TE
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ND
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1C- 2C-
AP
PE
ND
IX C
AP
PE
ND
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Incubation and emergence - Sammamish population
Stream rearing - Sammamish population
Downstream migration – Sammamish population
Lake rearing – Sammamish population
Stream rearing – Cedar population
Downstream migration – Cedar population
Lake rearing - Cedar population
Migration to Puget Sound- Sammamish and Cedar populations
Nearshore foraging - Sammamish and Cedar populations
Maturation (Marine Waters) - Sammamish and Cedar populations
Pressure Rating DefinitionsSCOPE: Most commonly defined spatially as the proportion of the habitat component (life stage + geography) that can reasonably be expected to be affected by the pressure within ten years given the continuation of current circumstances and trends. For ecosystem and ecological communities, measured as the proportion of the component’s occurrence.
Low: The pressure is likely to be very narrow in its scope, affecting the component across a small (1-10%) proportion of the area/population.
Medium: The pressure is likely to be restricted in its scope, affecting the component across some (~11-30%) of the area/population.
High: The pressure is likely to be widespread in its scope, affecting the component across much (~31-70%) of the area/population.
Very High: The pressure is likely to be pervasive in its scope, affecting the component across all or most (~71-100%) of the area/population.
SEVERITY: Within the scope, the level of damage to the component from the pressure that can reasonably be expected given the continuation of current circumstances and trends.
Low: Within the scope, the pressure is likely to slightly degree/reduce the component or reduce its population by ~1-10% within ten years or three generations.
Medium: Within the scope, the pressure is likely to moderately degrade/reduce the component or reduce its population by ~11-30% within ten years or three generations.
High: Within the scope, the pressure is likely to seriously degrade/reduce the component or reduce its population by ~31-70% within ten years or three generations.
Very High: Within the scope, the pressure is likely to destroy or eliminate the component or reduce its population by ~71-100% within ten years or three generations.
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
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alm
on
Co
nse
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tio
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-YE
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017
1C- 2C-
AP
PE
ND
IX C
AP
PE
ND
IX C
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3IRREVERSIBILITY (PERMANENCE): The degree to which the effects of a pressure can be reversed and the component affected by the pressure restored
Low: The effects of the pressure are easily reversible and the component can be easily restored at a relatively low cost and/or within 0-5 years.
Medium: The effects of the pressure can be reversed and the component can be restored with a reasonable commitment of resources and/or within 6-20 years.
High: The effects of the pressure can technically be reversed and the component restored, but it is not practically affordable and/or within 21-100 years.
Very High: The effects of the pressure cannot be reversed and it is very unlikely the component can be restored, and/or it would take more than 100 years to achieve this.
Results:The summary results are shown in Table 1. The rating for each pressure to component pair is performed in Miradi using an algorithm to weigh scope, severity and irreversibility. A rating of Low, Medium, High or Very High is assigned to all relevant relationships (a blank cell indicates no significant relationship is hypothesized between the pressure and life stage). The TC highlighted high or very high pressures for the most important life stages to address first.
Climate impacts are reflected in the results. By considering altered peak flows, temperatures and predation, which are predicted to be exacerbated in WRIA 8 by continued climate change, the ratings reflect current and predicted worsening through the severity and irreversibility ratings.
The life stages identified for the WRIA 8 Chinook Recovery Plan update process as the highest priority are lake rearing, stream rearing, and migration (both downstream migrants and returning adults). The high and very high pressures for each priority life stage were summarized and were presented to a workshop of WRIA 8 TC and Implementation Committee (IC) members in August of 2016. The joint workshop analyzed the current recovery strategies in relation to the pressures and developed new strategies where needed. Some pressures were only relevant or highly rated for one of the populations; therefore, strategies have a geographic specificity reflected in the recovery strategies and associated actions.
At a high level, the pressures assessment process and workshops confirmed the following pressures as most important to address in WRIA 8 for Chinook salmon recovery:
• Land conversion
• Levees
• Shoreline armoring
• Altered peak flows
• Increased water temperatures
• Predation (native and non-native species)
• Ballard Locks (fish passage)
ReferencesPuget Sound Partnership (PSP). 2014. Puget Sound pressure assessment – stressor definitions. https://docs.google.com/. Accessed July 18, 2017.
WR
IA 8
Pre
ssur
es A
sses
smen
t by
life
stag
eVe
rsio
n: 2
017-
06-2
9
Pres
sure
Rat
ings
– S
umm
ary
Tabl
eN
OTE
S: C
= C
edar
Pop
ulat
ion;
S =
Sam
mam
ish
Popu
latio
n. L
ife st
ages
as i
n W
RIA
8 C
once
ptua
l Mod
el
Pres
sure
s \
Com
pone
nts
C -
Adu
lt M
igra
tion
S - A
dult
Mig
ratio
nC
- Sp
awni
ng
S -
Spaw
nin
g
C -
Inc
&
Emer
geS
- Inc
&
Emer
geS
- St
ream
R
earin
g
C -
Stre
am
Rea
ring
S -
Dns
trm
M
igra
tion
C -
Dns
trm
M
igra
tion
S - L
ake
Rea
ring
C -
Lake
R
earin
gS&
C –
M
igra
tion
to P
S
S&C
- N
ears
hore
Fora
ging
S &
C -
Mat
urat
ion
01.1
Con
vers
ion
of
land
cov
er fo
r re
side
ntia
l, co
mm
erci
al, a
nd
indu
stria
l use
Low
Low
Low
Low
Med
ium
Med
ium
Med
ium
Med
ium
Hig
hH
igh
Very
Hig
hH
igh
01.3
Con
vers
ion
of
land
cov
er fo
r tra
nspo
rtatio
n &
ut
ilitie
s
Hig
hM
ediu
mM
ediu
mM
ediu
mH
igh
02 T
erre
stria
l ha
bita
t fr
agm
enta
tion
Med
ium
Med
ium
03 S
hore
line
hard
enin
gLo
wLo
wM
ediu
mH
igh
Hig
hH
igh
Very
Hig
hH
igh
Hig
hH
igh
Hig
hH
igh
Hig
h
04 S
hadi
ng o
f sh
allo
w w
ater
ha
bita
t
Med
ium
Med
ium
05.1
Bal
lard
Loc
ksVe
ry H
igh
Very
Hig
hVe
ry H
igh
05.2
Cul
verts
and
ot
her f
ish
pass
age
barr
iers
Low
Hig
hLo
w
07.1
Ter
rest
rial a
nd
fres
hwat
er sp
ecie
s di
stur
banc
e in
hu
man
dom
inat
ed
area
s
Low
Med
ium
Med
ium
Hig
hH
igh
Med
ium
Hig
hH
igh
Hig
hH
igh
10.1
Alte
red
peak
flo
ws f
rom
land
co
ver c
hang
e
Low
Med
ium
Low
Hig
hLo
wH
igh
Hig
hM
ediu
mLo
wLo
w
11.1
Alte
red
low
flo
ws f
rom
land
co
ver c
hang
e
Low
Med
ium
Low
Med
ium
Low
Med
ium
Low
Low
Low
Low
11.3
Alte
red
low
flo
ws f
rom
w
ithdr
awal
s
Low
Med
ium
Low
Med
ium
Low
Low
Low
Low
Low
Low
13.1
In c
hann
el
stru
ctur
al b
arrie
rs to
w
ater
, sed
imen
t, de
bris
flow
s
Low
Low
Low
Low
Hig
hH
igh
Hig
hLo
wH
igh
Hig
hH
igh
Hig
h
13.2
Lev
ees a
nd
Rev
etm
ents
Med
ium
Med
ium
Hig
hH
igh
Very
Hig
hH
igh
Hig
hH
igh
14 A
nim
al h
arve
stLo
wLo
wM
ediu
m17
.1 P
reda
tion
from
in
crea
sed
nativ
e sp
ecie
s
Low
Low
Med
ium
Med
ium
Med
ium
Med
ium
Hig
hH
igh
Hig
hH
igh
Hig
hH
igh
Hig
h
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
AP
PE
ND
IX C
3C- 4C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
WR
IA 8
Pre
ssur
es A
sses
smen
t by
life
stag
eVe
rsio
n: 2
017-
06-2
9
Pres
sure
Rat
ings
– S
umm
ary
Tabl
eN
OTE
S: C
= C
edar
Pop
ulat
ion;
S =
Sam
mam
ish
Popu
latio
n. L
ife st
ages
as i
n W
RIA
8 C
once
ptua
l Mod
el
Pres
sure
s \
Com
pone
nts
C -
Adu
lt M
igra
tion
S - A
dult
Mig
ratio
nC
- Sp
awni
ng
S -
Spaw
nin
g
C -
Inc
&
Emer
geS
- Inc
&
Emer
geS
- St
ream
R
earin
g
C -
Stre
am
Rea
ring
S -
Dns
trm
M
igra
tion
C -
Dns
trm
M
igra
tion
S - L
ake
Rea
ring
C -
Lake
R
earin
gS&
C –
M
igra
tion
to P
S
S&C
- N
ears
hore
Fora
ging
S &
C -
Mat
urat
ion
01.1
Con
vers
ion
of
land
cov
er fo
r re
side
ntia
l, co
mm
erci
al, a
nd
indu
stria
l use
Low
Low
Low
Low
Med
ium
Med
ium
Med
ium
Med
ium
Hig
hH
igh
Very
Hig
hH
igh
01.3
Con
vers
ion
of
land
cov
er fo
r tra
nspo
rtatio
n &
ut
ilitie
s
Hig
hM
ediu
mM
ediu
mM
ediu
mH
igh
02 T
erre
stria
l ha
bita
t fr
agm
enta
tion
Med
ium
Med
ium
03 S
hore
line
hard
enin
gLo
wLo
wM
ediu
mH
igh
Hig
hH
igh
Very
Hig
hH
igh
Hig
hH
igh
Hig
hH
igh
Hig
h
04 S
hadi
ng o
f sh
allo
w w
ater
ha
bita
t
Med
ium
Med
ium
05.1
Bal
lard
Loc
ksVe
ry H
igh
Very
Hig
hVe
ry H
igh
05.2
Cul
verts
and
ot
her f
ish
pass
age
barr
iers
Low
Hig
hLo
w
07.1
Ter
rest
rial a
nd
fres
hwat
er sp
ecie
s di
stur
banc
e in
hu
man
dom
inat
ed
area
s
Low
Med
ium
Med
ium
Hig
hH
igh
Med
ium
Hig
hH
igh
Hig
hH
igh
10.1
Alte
red
peak
flo
ws f
rom
land
co
ver c
hang
e
Low
Med
ium
Low
Hig
hLo
wH
igh
Hig
hM
ediu
mLo
wLo
w
11.1
Alte
red
low
flo
ws f
rom
land
co
ver c
hang
e
Low
Med
ium
Low
Med
ium
Low
Med
ium
Low
Low
Low
Low
11.3
Alte
red
low
flo
ws f
rom
w
ithdr
awal
s
Low
Med
ium
Low
Med
ium
Low
Low
Low
Low
Low
Low
13.1
In c
hann
el
stru
ctur
al b
arrie
rs to
w
ater
, sed
imen
t, de
bris
flow
s
Low
Low
Low
Low
Hig
hH
igh
Hig
hLo
wH
igh
Hig
hH
igh
Hig
h
13.2
Lev
ees a
nd
Rev
etm
ents
Med
ium
Med
ium
Hig
hH
igh
Very
Hig
hH
igh
Hig
hH
igh
14 A
nim
al h
arve
stLo
wLo
wM
ediu
m17
.1 P
reda
tion
from
in
crea
sed
nativ
e sp
ecie
s
Low
Low
Med
ium
Med
ium
Med
ium
Med
ium
Hig
hH
igh
Hig
hH
igh
Hig
hH
igh
Hig
h
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
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tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
3C- 4C-
AP
PE
ND
IX C
AP
PE
ND
IX C
Table C-1. WRIA 8 Pressures Assessment by Life Stage - Version: 2017-06-29
-
5
17.2
Dis
plac
emen
t by
incr
ease
d na
tive
spec
ies
Low
Low
Low
Low
Med
ium
Med
ium
Med
ium
Med
ium
Low
Low
18.1
Pre
datio
n fr
om
non-
nativ
e sp
ecie
sH
igh
Hig
hH
igh
Hig
hM
ediu
mM
ediu
mH
igh
21.1
Poi
nt so
urce
, pe
rsis
tent
toxi
c ch
emic
als i
n aq
uatic
sy
stem
s
Low
Low
Med
ium
Med
ium
Med
ium
21.2
Non
-poi
nt
sour
ce, p
ersi
sten
t to
xic
chem
ical
s in
aqua
tic sy
stem
s
Low
Low
Low
Low
Med
ium
Med
ium
Med
ium
Med
ium
Med
ium
Med
ium
Med
ium
Med
ium
Med
ium
22.1
Poi
nt so
urce
, no
n-pe
rsis
tent
toxi
c ch
emic
als i
n aq
uatic
sy
stem
s
Low
Low
Med
ium
Med
ium
Med
ium
22.2
Non
-poi
nt
sour
ce, n
on-
pers
iste
nt to
xic
chem
ical
s in
aqua
tic
syst
ems
Low
Low
Low
Low
Med
ium
Med
ium
Hig
hM
ediu
mM
ediu
mM
ediu
mM
ediu
mM
ediu
mM
ediu
m
24.2
Non
-poi
nt
sour
ce c
onve
ntio
nal
wat
er p
ollu
tant
s
Low
Low
Low
Low
Low
Hig
hH
igh
Low
Med
ium
Med
ium
Med
ium
Med
ium
Med
ium
24.3
Cha
nges
in
wat
er te
mpe
ratu
re
from
loca
l cau
ses
Med
ium
Hig
hLo
wM
ediu
mLo
wLo
wH
igh
Med
ium
Med
ium
Med
ium
Hig
hH
igh
Hig
h
26.1
Cha
ngin
g ai
r te
mpe
ratu
reM
ediu
mH
igh
Low
Med
ium
Low
Low
Med
ium
Med
ium
Med
ium
Med
ium
Hig
hH
igh
Hig
h
26.4
Cha
ngin
g oc
ean
cond
ition
Hig
hH
igh
01.2
Con
vers
ion
of
land
cov
er fo
r na
tura
l res
ourc
es
prod
uctio
n
Low
Low
Low
Low
Low
7.2
Terr
estri
al a
nd
fres
hwat
er sp
ecie
s di
stur
banc
es in
na
tura
l lan
dsca
pes
Low
Low
Low
Low
08 S
peci
es
dist
urba
nces
- m
arin
e
Low
Med
ium
10.2
Alte
red
peak
flo
ws f
rom
clim
ate
chan
ge
Med
ium
Med
ium
Hig
hH
igh
Med
ium
Med
ium
Very
Hig
hH
igh
Med
ium
Med
ium
11.2
Alte
red
low
flo
ws f
rom
clim
ate
chan
ge
Low
Hig
hLo
wH
igh
Low
Med
ium
Med
ium
Med
ium
Low
Low
12 F
low
regu
latio
n --
pre
vent
ion
of
flood
flow
s
Med
ium
Med
ium
15 B
ycat
chLo
wLo
wLo
w
l
La
ke
Wa
shin
gto
n/C
ed
ar/
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mm
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ish
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ters
he
d (W
RIA
8) C
hin
oo
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alm
on
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nse
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n P
lan
l
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-YE
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AP
PE
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5C- 6C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
23 L
arge
Spi
llsLo
wLo
wLo
wLo
wLo
wLo
w24
.1 P
oint
sour
ce
conv
entio
nal w
ater
po
lluta
nts
Low
Low
Low
26.3
Sea
leve
l ris
eVe
ry H
igh
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
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017
5C- 6C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
7
Pre
ssur
e R
atin
g D
etai
ls
S - S
paw
ning Pr
essu
reSc
ope
Seve
rity
Irrev
ersi
bilit
ySu
mm
ary
Pres
sure
Rat
ing
Com
men
ts11
.3. 1
1.3
Alte
red
low
flow
s fro
m
with
draw
als
Med
ium
Med
ium
Hig
hM
ediu
mLo
w fl
ows d
urin
g ad
ult s
paw
ning
pe
riod
(fro
m w
ells
) are
pos
sibl
e,
pote
ntia
lly d
elay
ing
or p
reve
ntin
g m
igra
tion
to sp
awni
ng st
ream
s. Se
e Tr
ibut
ary
stre
amflo
w d
ocum
ent
(Trib
utar
y St
ream
flow
Tec
hnic
al
Com
mitt
ee 2
006)
. Hig
hest
nee
d/im
porta
nce/
bene
fits t
o be
seen
in
Bea
r, EF
Issa
quah
, Iss
aqua
h an
d R
ock
Cre
ek. a
lso
augm
entin
g co
ld
wat
er in
flow
s to
Sam
mam
ish.
13.1
. 13.
1 In
cha
nnel
stru
ctur
al
barr
iers
to w
ater
, sed
imen
t, de
bris
flo
ws
Low
Low
Med
ium
Low
13.2
. 13.
2 Le
vees
and
Rev
etm
ents
Med
ium
Med
ium
Hig
hM
ediu
mTh
is p
ress
ure
incl
udes
leve
es a
nd
reve
tmen
ts. E
ffect
on
spaw
ning
ha
bita
t to
the
exte
nt it
rest
ricts
cr
eatio
n of
side
cha
nnel
s (us
ed b
y C
hino
ok fo
r spa
wni
ng) o
r affe
cts
the
natu
ral d
eliv
ery
and
depo
sitio
n of
spaw
ning
gra
vel.
01.2
. 01.
2 C
onve
rsio
n of
land
cov
er
for n
atur
al re
sour
ces p
rodu
ctio
nLo
wLo
wLo
wLo
wC
urre
nt n
atur
al re
sour
ce p
rodu
ctio
n lim
ited
to sm
all t
imbe
r har
vest
ar
eas o
n D
NR
land
in u
pper
reac
hes
of Is
saqu
ah C
reek
and
its
tribu
tarie
s.10
.2. 1
0.2
Alte
red
peak
flow
s fro
m
clim
ate
chan
geM
ediu
mH
igh
Very
Hig
hH
igh
Clim
ate
scen
ario
s do
not i
ndic
ate
high
er fl
ows e
arlie
r in
seas
on.
(CH
ECK
) Pot
entia
l for
hig
her f
all
flow
s, in
crea
sed
occu
rren
ce o
f at
mos
pher
ic ri
vers
.03
. 03
Shor
elin
e ha
rden
ing
Hig
hH
igh
Hig
hH
igh
Har
dene
d sh
orel
ines
affe
ct
spaw
ning
hab
itat q
uant
ity a
nd
qual
ity. A
rmor
ing
also
lim
its
inst
ream
woo
d an
d ov
erha
ngin
g ve
geta
tion
for c
over
. Lik
ely
mor
e pr
onou
nced
insi
de U
GA
.17
.1. 1
7.1
Pred
atio
n fr
om in
crea
sed
nativ
e sp
ecie
sM
ediu
mM
ediu
mM
ediu
mM
ediu
mPr
edat
ion
on e
ggs b
y cu
tthro
at,
scul
pin
etc
-- n
o ev
iden
ce o
f in
crea
sed
num
bers
(?)
17.2
. 17.
2 D
ispl
acem
ent b
y in
crea
sed
nativ
e sp
ecie
sLo
wLo
wH
igh
Low
7.2.
7.2
Ter
rest
rial a
nd fr
eshw
ater
sp
ecie
s dis
turb
ance
s in
natu
ral
land
scap
es
Low
Low
Low
Low
Few
nat
ural
land
scap
es in
Sa
mm
amis
h sy
stem
(upp
er re
ache
s of
Issa
quah
Cre
ek) l
ikel
y to
see
very
littl
e sp
ecie
s dis
turb
ance
. Mos
t sp
ecie
s dis
turb
ance
will
occ
ur in
de
velo
ped
land
scap
es.
C -
Inc
& E
mer
ge
Pres
sure
Scop
eSe
verit
yIrr
ever
sibi
lity
Sum
mar
y Pr
essu
re R
atin
gC
omm
ents
11.3
. 11.
3 A
ltere
d lo
w fl
ows f
rom
w
ithdr
awal
sLo
wLo
wLo
wLo
wW
ithdr
awal
s for
mun
icip
al w
ater
su
pply
are
miti
gate
d by
flow
rule
s un
der t
he C
R H
CP.
Low
flow
s are
m
onito
red
and
man
aged
to p
reve
nt
dew
ater
ing
of re
dds.
13.1
. 13.
1 In
cha
nnel
stru
ctur
al
barr
iers
to w
ater
, sed
imen
t, de
bris
flo
ws
Hig
hH
igh
Med
ium
Hig
h
13.2
. 13.
2 Le
vees
and
Rev
etm
ents
Hig
hH
igh
Hig
hH
igh
This
pre
ssur
e in
clud
es le
vees
and
re
vetm
ents
. Effe
ct o
n in
cuba
tion
to
the
exte
nt it
affe
cts h
ydra
ulic
s and
sc
our.
10.2
. 10.
2 A
ltere
d pe
ak fl
ows f
rom
cl
imat
e ch
ange
Med
ium
Hig
hH
igh
Med
ium
If c
hang
ing
clim
ate
brin
gs m
ore
atm
osph
eric
rive
r/oth
er h
igh
flow
ev
ents
, cou
ld re
sult
in in
crea
sing
re
dd sc
our a
nd d
imin
ishe
d su
rviv
al.
Man
agem
ent r
espo
nse
shou
ld b
e to
in
crea
se re
silie
nce
of st
ream
ec
osys
tem
s (re
conn
ect f
lood
pla
ins,
incr
ease
woo
d in
stre
ams,
incr
ease
rip
aria
n co
ver)
. NO
TE: C
edar
HC
P flo
w c
ontro
l, w
here
pos
sibl
e, c
ould
bu
ffer i
mpa
cts f
rom
som
e ev
ents
. W
ater
man
agem
ent i
s not
des
igne
d fo
r flo
od c
ontro
l how
ever
.03
. 03
Shor
elin
e ha
rden
ing
Med
ium
Hig
hVe
ry H
igh
Hig
hEf
fect
on
incu
batio
n to
the
exte
nt it
af
fect
s hyd
raul
ics a
nd sc
our.
Shor
elin
e ha
rden
ing
scor
es h
ighe
r in
irre
vers
ibili
ty th
an "
othe
r st
ruct
ural
bar
riers
" pr
essu
re th
ough
lo
wer
in sc
ope
(def
inin
g th
is th
reat
to
incl
ude
infr
astru
ctur
e in
urb
an
area
s whe
re re
mov
al is
unl
ikel
y in
ne
xt 1
00y)
.17
.1. 1
7.1
Pred
atio
n fr
om in
crea
sed
nativ
e sp
ecie
sM
ediu
mM
ediu
mM
ediu
mM
ediu
mpr
edat
ion
of e
mer
ging
fry
by
scul
pin
-- n
o ev
iden
ce o
f inc
reas
ed
nativ
e sp
p (?
)17
.2. 1
7.2
Dis
plac
emen
t by
incr
ease
d na
tive
spec
ies
Low
Low
Hig
hLo
w
21.2
. 21.
2 N
on-p
oint
sour
ce,
pers
iste
nt to
xic
chem
ical
s in
aqua
tic
syst
ems
Med
ium
Med
ium
Hig
hM
ediu
m
11.2
. 11.
2 A
ltere
d lo
w fl
ows f
rom
cl
imat
e ch
ange
Low
Low
Low
Low
NO
TE: C
edar
Inst
ream
Flo
w
Agr
eem
ent m
aint
ains
min
imum
flo
ws t
o pr
even
t dew
ater
ing
of
redd
s.22
.2. 2
2.2
Non
-poi
nt so
urce
, non
-pe
rsis
tent
toxi
c ch
emic
als i
n aq
uatic
sy
stem
s
Med
ium
Med
ium
Hig
hM
ediu
mSe
e no
n-po
int s
ourc
e pe
rsis
tent
ch
emic
als
24.2
. 24.
2 N
on-p
oint
sour
ce
conv
entio
nal w
ater
pol
luta
nts
Low
Low
Low
Low
Not
as m
uch
of a
n is
sue
in th
e C
edar
.10
.1. 1
0.1
Alte
red
peak
flow
s fro
m
land
cov
er c
hang
eLo
wLo
wLo
wLo
wN
ot li
kely
to b
e a
stro
ng p
ress
ure
on th
is li
fe st
age
in C
edar
bas
in.
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
AP
PE
ND
IX C
7C- 8C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
Pre
ssur
e R
atin
g D
etai
ls
S - S
paw
ning Pr
essu
reSc
ope
Seve
rity
Irrev
ersi
bilit
ySu
mm
ary
Pres
sure
Rat
ing
Com
men
ts11
.3. 1
1.3
Alte
red
low
flow
s fro
m
with
draw
als
Med
ium
Med
ium
Hig
hM
ediu
mLo
w fl
ows d
urin
g ad
ult s
paw
ning
pe
riod
(fro
m w
ells
) are
pos
sibl
e,
pote
ntia
lly d
elay
ing
or p
reve
ntin
g m
igra
tion
to sp
awni
ng st
ream
s. Se
e Tr
ibut
ary
stre
amflo
w d
ocum
ent
(Trib
utar
y St
ream
flow
Tec
hnic
al
Com
mitt
ee 2
006)
. Hig
hest
nee
d/im
porta
nce/
bene
fits t
o be
seen
in
Bea
r, EF
Issa
quah
, Iss
aqua
h an
d R
ock
Cre
ek. a
lso
augm
entin
g co
ld
wat
er in
flow
s to
Sam
mam
ish.
13.1
. 13.
1 In
cha
nnel
stru
ctur
al
barr
iers
to w
ater
, sed
imen
t, de
bris
flo
ws
Low
Low
Med
ium
Low
13.2
. 13.
2 Le
vees
and
Rev
etm
ents
Med
ium
Med
ium
Hig
hM
ediu
mTh
is p
ress
ure
incl
udes
leve
es a
nd
reve
tmen
ts. E
ffect
on
spaw
ning
ha
bita
t to
the
exte
nt it
rest
ricts
cr
eatio
n of
side
cha
nnel
s (us
ed b
y C
hino
ok fo
r spa
wni
ng) o
r affe
cts
the
natu
ral d
eliv
ery
and
depo
sitio
n of
spaw
ning
gra
vel.
01.2
. 01.
2 C
onve
rsio
n of
land
cov
er
for n
atur
al re
sour
ces p
rodu
ctio
nLo
wLo
wLo
wLo
wC
urre
nt n
atur
al re
sour
ce p
rodu
ctio
n lim
ited
to sm
all t
imbe
r har
vest
ar
eas o
n D
NR
land
in u
pper
reac
hes
of Is
saqu
ah C
reek
and
its
tribu
tarie
s.10
.2. 1
0.2
Alte
red
peak
flow
s fro
m
clim
ate
chan
geM
ediu
mH
igh
Very
Hig
hH
igh
Clim
ate
scen
ario
s do
not i
ndic
ate
high
er fl
ows e
arlie
r in
seas
on.
(CH
ECK
) Pot
entia
l for
hig
her f
all
flow
s, in
crea
sed
occu
rren
ce o
f at
mos
pher
ic ri
vers
.03
. 03
Shor
elin
e ha
rden
ing
Hig
hH
igh
Hig
hH
igh
Har
dene
d sh
orel
ines
affe
ct
spaw
ning
hab
itat q
uant
ity a
nd
qual
ity. A
rmor
ing
also
lim
its
inst
ream
woo
d an
d ov
erha
ngin
g ve
geta
tion
for c
over
. Lik
ely
mor
e pr
onou
nced
insi
de U
GA
.17
.1. 1
7.1
Pred
atio
n fr
om in
crea
sed
nativ
e sp
ecie
sM
ediu
mM
ediu
mM
ediu
mM
ediu
mPr
edat
ion
on e
ggs b
y cu
tthro
at,
scul
pin
etc
-- n
o ev
iden
ce o
f in
crea
sed
num
bers
(?)
17.2
. 17.
2 D
ispl
acem
ent b
y in
crea
sed
nativ
e sp
ecie
sLo
wLo
wH
igh
Low
7.2.
7.2
Ter
rest
rial a
nd fr
eshw
ater
sp
ecie
s dis
turb
ance
s in
natu
ral
land
scap
es
Low
Low
Low
Low
Few
nat
ural
land
scap
es in
Sa
mm
amis
h sy
stem
(upp
er re
ache
s of
Issa
quah
Cre
ek) l
ikel
y to
see
very
littl
e sp
ecie
s dis
turb
ance
. Mos
t sp
ecie
s dis
turb
ance
will
occ
ur in
de
velo
ped
land
scap
es.
C -
Inc
& E
mer
ge
Pres
sure
Scop
eSe
verit
yIrr
ever
sibi
lity
Sum
mar
y Pr
essu
re R
atin
gC
omm
ents
11.3
. 11.
3 A
ltere
d lo
w fl
ows f
rom
w
ithdr
awal
sLo
wLo
wLo
wLo
wW
ithdr
awal
s for
mun
icip
al w
ater
su
pply
are
miti
gate
d by
flow
rule
s un
der t
he C
R H
CP.
Low
flow
s are
m
onito
red
and
man
aged
to p
reve
nt
dew
ater
ing
of re
dds.
13.1
. 13.
1 In
cha
nnel
stru
ctur
al
barr
iers
to w
ater
, sed
imen
t, de
bris
flo
ws
Hig
hH
igh
Med
ium
Hig
h
13.2
. 13.
2 Le
vees
and
Rev
etm
ents
Hig
hH
igh
Hig
hH
igh
This
pre
ssur
e in
clud
es le
vees
and
re
vetm
ents
. Effe
ct o
n in
cuba
tion
to
the
exte
nt it
affe
cts h
ydra
ulic
s and
sc
our.
10.2
. 10.
2 A
ltere
d pe
ak fl
ows f
rom
cl
imat
e ch
ange
Med
ium
Hig
hH
igh
Med
ium
If c
hang
ing
clim
ate
brin
gs m
ore
atm
osph
eric
rive
r/oth
er h
igh
flow
ev
ents
, cou
ld re
sult
in in
crea
sing
re
dd sc
our a
nd d
imin
ishe
d su
rviv
al.
Man
agem
ent r
espo
nse
shou
ld b
e to
in
crea
se re
silie
nce
of st
ream
ec
osys
tem
s (re
conn
ect f
lood
pla
ins,
incr
ease
woo
d in
stre
ams,
incr
ease
rip
aria
n co
ver)
. NO
TE: C
edar
HC
P flo
w c
ontro
l, w
here
pos
sibl
e, c
ould
bu
ffer i
mpa
cts f
rom
som
e ev
ents
. W
ater
man
agem
ent i
s not
des
igne
d fo
r flo
od c
ontro
l how
ever
.03
. 03
Shor
elin
e ha
rden
ing
Med
ium
Hig
hVe
ry H
igh
Hig
hEf
fect
on
incu
batio
n to
the
exte
nt it
af
fect
s hyd
raul
ics a
nd sc
our.
Shor
elin
e ha
rden
ing
scor
es h
ighe
r in
irre
vers
ibili
ty th
an "
othe
r st
ruct
ural
bar
riers
" pr
essu
re th
ough
lo
wer
in sc
ope
(def
inin
g th
is th
reat
to
incl
ude
infr
astru
ctur
e in
urb
an
area
s whe
re re
mov
al is
unl
ikel
y in
ne
xt 1
00y)
.17
.1. 1
7.1
Pred
atio
n fr
om in
crea
sed
nativ
e sp
ecie
sM
ediu
mM
ediu
mM
ediu
mM
ediu
mpr
edat
ion
of e
mer
ging
fry
by
scul
pin
-- n
o ev
iden
ce o
f inc
reas
ed
nativ
e sp
p (?
)17
.2. 1
7.2
Dis
plac
emen
t by
incr
ease
d na
tive
spec
ies
Low
Low
Hig
hLo
w
21.2
. 21.
2 N
on-p
oint
sour
ce,
pers
iste
nt to
xic
chem
ical
s in
aqua
tic
syst
ems
Med
ium
Med
ium
Hig
hM
ediu
m
11.2
. 11.
2 A
ltere
d lo
w fl
ows f
rom
cl
imat
e ch
ange
Low
Low
Low
Low
NO
TE: C
edar
Inst
ream
Flo
w
Agr
eem
ent m
aint
ains
min
imum
flo
ws t
o pr
even
t dew
ater
ing
of
redd
s.22
.2. 2
2.2
Non
-poi
nt so
urce
, non
-pe
rsis
tent
toxi
c ch
emic
als i
n aq
uatic
sy
stem
s
Med
ium
Med
ium
Hig
hM
ediu
mSe
e no
n-po
int s
ourc
e pe
rsis
tent
ch
emic
als
24.2
. 24.
2 N
on-p
oint
sour
ce
conv
entio
nal w
ater
pol
luta
nts
Low
Low
Low
Low
Not
as m
uch
of a
n is
sue
in th
e C
edar
.10
.1. 1
0.1
Alte
red
peak
flow
s fro
m
land
cov
er c
hang
eLo
wLo
wLo
wLo
wN
ot li
kely
to b
e a
stro
ng p
ress
ure
on th
is li
fe st
age
in C
edar
bas
in.
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
7C- 8C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
9
24.3
. 24.
3 C
hang
es in
wat
er
tem
pera
ture
from
loca
l cau
ses
Hig
hLo
wH
igh
Low
Incu
batio
n tim
e sh
orte
ns a
s wat
er
tem
p in
crea
ses.
Seve
rity
is lo
w fo
r th
is li
fe st
age;
12. 1
2 Fl
ow re
gula
tion
--
prev
entio
n of
floo
d flo
ws
Med
ium
Low
Very
Hig
hM
ediu
mFl
ow re
gula
tion
on th
e C
edar
Riv
er
does
atte
nuat
e flo
od fl
ows.
This
has
ne
gativ
e co
nseq
uenc
es fo
r hab
itat-
form
ing
proc
esse
s tha
t pro
vide
sp
awni
ng g
rave
ls a
nd h
abita
t. O
n th
e ot
her h
and,
pre
vent
ion
of fl
ood
flow
s dur
ing
incu
batio
n an
d em
erge
nce
incr
ease
s fry
surv
ival
. G
reat
er is
sue
is d
isco
nnec
tion
of
flood
plai
n fr
om ri
ver c
hann
el.
26.1
. 26.
1 C
hang
ing
air t
empe
ratu
reH
igh
Low
Hig
hLo
wSe
e ch
angi
ng w
ater
tem
pera
ture
no
tes f
or th
is li
fe st
age.
Effe
cts o
f ch
angi
ng a
ir te
mpe
ratu
re o
n fis
h fe
lt th
roug
h ch
angi
ng w
ater
te
mpe
ratu
re.
11.1
. 11.
1 A
ltere
d lo
w fl
ows f
rom
la
nd c
over
cha
nge
Low
Low
Hig
hLo
wA
ltere
d lo
w fl
ows f
rom
LC
cha
nge
not l
ikel
y to
hav
e m
uch
of a
n im
pact
on
this
life
stag
e.
C -
Adu
lt M
igra
tion
Pres
sure
Scop
eSe
verit
yIrr
ever
sibi
lity
Sum
mar
y Pr
essu
re R
atin
gC
omm
ents
11.3
. 11.
3 A
ltere
d lo
w fl
ows f
rom
w
ithdr
awal
sLo
wM
ediu
mH
igh
Low
Ced
ar R
inst
ream
flow
s man
aged
th
roug
h C
edar
Riv
er H
abita
t C
onse
rvat
ion
Plan
to p
rovi
de
spaw
ning
flow
s. Th
e gr
oup
is n
ot
sayi
ng th
at th
is is
a h
uge
impa
ct to
fis
h bu
t the
irre
vers
ibili
ty is
hig
h be
caus
e it
is p
art o
f the
HC
P an
d w
ould
n't b
e ch
ange
d.13
.1. 1
3.1
In c
hann
el st
ruct
ural
ba
rrie
rs to
wat
er, s
edim
ent,
debr
is
flow
s
Low
Low
Med
ium
Low
14. 1
4 A
nim
al h
arve
stLo
wLo
wH
igh
Low
Har
vest
is g
over
ned
by
inte
rnat
iona
l tre
aty
and
Puge
t So
und
Har
vest
Man
agem
ent P
lan.
O
nly
look
ing
at fw
com
pone
nt…
al
so, h
arve
st is
a g
oal…
(har
vest
we
are
leav
ing
to c
o m
anag
ers,
and
noaa
– ra
nkin
g lo
w b
ased
on
poac
hing
and
inci
dent
al fi
sher
ies…
appr
oved
by
NO
AA
). To
tal a
nnua
l ha
rves
t rat
es fo
r all
area
s app
rox
20%
-54%
ove
r las
t 10
year
s. 15
. 15
Byc
atch
Low
Low
Med
ium
Low
Som
e by
catc
h oc
curs
dur
ing
coho
or
sock
eye
fishe
ry, w
hen
thos
e fis
herie
s occ
ur. C
lose
ly m
onito
red.
10.2
. 10.
2 A
ltere
d pe
ak fl
ows f
rom
cl
imat
e ch
ange
Low
Low
Very
Hig
hM
ediu
mC
limat
e sc
enar
ios d
o no
t ind
icat
e al
tere
d pe
ak fl
ows e
arlie
r in
seas
on
– th
eref
ore
not l
ikel
y to
affe
ct th
is
life
stag
e.03
. 03
Shor
elin
e ha
rden
ing
Med
ium
Low
Hig
hLo
wM
ost s
ever
e at
Bal
lard
Loc
ks/S
hip
Can
al a
rea.
Som
e ar
eas a
long
m
igra
tion
corr
idor
are
mor
e se
vere
ly a
ffect
ed th
an o
ther
s. A
dult
life
stag
e no
t as a
ffect
ed a
s oth
ers.
17.1
. 17.
1 Pr
edat
ion
from
incr
ease
d na
tive
spec
ies
Low
Low
Low
Low
pote
ntia
l inc
reas
ed n
ativ
e pr
edat
ors
in S
alm
on B
ay, t
houg
h no
dat
a to
su
bsta
ntia
te05
.1. 0
5.1
Bal
lard
Loc
ksVe
ry H
igh
Hig
hVe
ry H
igh
Very
Hig
hTh
is p
ress
ure
is th
e pr
oxy
for t
he
Chi
ttend
en L
ocks
.C
ould
del
ay m
igra
tion;
salin
ity,
tem
p, p
hysi
cal b
arrie
r... B
IOP
says
it
is a
bar
rier.
Con
side
r sev
erity
in te
rms o
f st
ruct
ure
itsel
f but
als
o sa
linity
and
te
mp
exch
ange
bar
rier.
7.2.
7.2
Ter
rest
rial a
nd fr
eshw
ater
sp
ecie
s dis
turb
ance
s in
natu
ral
land
scap
es
Low
Low
Low
Low
Exis
ting
ripar
ian
area
s in
natu
ral
land
scap
es a
re li
kely
to re
mai
n pr
otec
ted.
Som
e m
inim
al ra
fting
an
d"sa
lmon
wat
chin
g" o
ccur
s on
Ced
ar R
iver
dur
ing
fall
mig
ratio
n an
d sp
awni
ng se
ason
, tho
ugh
effe
ct
on m
igra
tion
and
spaw
ning
is n
ot
likel
y to
be
extre
me.
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
AP
PE
ND
IX C
9C- 10C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
C -
Adu
lt M
igra
tion
Pres
sure
Scop
eSe
verit
yIrr
ever
sibi
lity
Sum
mar
y Pr
essu
re R
atin
gC
omm
ents
11.3
. 11.
3 A
ltere
d lo
w fl
ows f
rom
w
ithdr
awal
sLo
wM
ediu
mH
igh
Low
Ced
ar R
inst
ream
flow
s man
aged
th
roug
h C
edar
Riv
er H
abita
t C
onse
rvat
ion
Plan
to p
rovi
de
spaw
ning
flow
s. Th
e gr
oup
is n
ot
sayi
ng th
at th
is is
a h
uge
impa
ct to
fis
h bu
t the
irre
vers
ibili
ty is
hig
h be
caus
e it
is p
art o
f the
HC
P an
d w
ould
n't b
e ch
ange
d.13
.1. 1
3.1
In c
hann
el st
ruct
ural
ba
rrie
rs to
wat
er, s
edim
ent,
debr
is
flow
s
Low
Low
Med
ium
Low
14. 1
4 A
nim
al h
arve
stLo
wLo
wH
igh
Low
Har
vest
is g
over
ned
by
inte
rnat
iona
l tre
aty
and
Puge
t So
und
Har
vest
Man
agem
ent P
lan.
O
nly
look
ing
at fw
com
pone
nt…
al
so, h
arve
st is
a g
oal…
(har
vest
we
are
leav
ing
to c
o m
anag
ers,
and
noaa
– ra
nkin
g lo
w b
ased
on
poac
hing
and
inci
dent
al fi
sher
ies…
appr
oved
by
NO
AA
). To
tal a
nnua
l ha
rves
t rat
es fo
r all
area
s app
rox
20%
-54%
ove
r las
t 10
year
s. 15
. 15
Byc
atch
Low
Low
Med
ium
Low
Som
e by
catc
h oc
curs
dur
ing
coho
or
sock
eye
fishe
ry, w
hen
thos
e fis
herie
s occ
ur. C
lose
ly m
onito
red.
10.2
. 10.
2 A
ltere
d pe
ak fl
ows f
rom
cl
imat
e ch
ange
Low
Low
Very
Hig
hM
ediu
mC
limat
e sc
enar
ios d
o no
t ind
icat
e al
tere
d pe
ak fl
ows e
arlie
r in
seas
on
– th
eref
ore
not l
ikel
y to
affe
ct th
is
life
stag
e.03
. 03
Shor
elin
e ha
rden
ing
Med
ium
Low
Hig
hLo
wM
ost s
ever
e at
Bal
lard
Loc
ks/S
hip
Can
al a
rea.
Som
e ar
eas a
long
m
igra
tion
corr
idor
are
mor
e se
vere
ly a
ffect
ed th
an o
ther
s. A
dult
life
stag
e no
t as a
ffect
ed a
s oth
ers.
17.1
. 17.
1 Pr
edat
ion
from
incr
ease
d na
tive
spec
ies
Low
Low
Low
Low
pote
ntia
l inc
reas
ed n
ativ
e pr
edat
ors
in S
alm
on B
ay, t
houg
h no
dat
a to
su
bsta
ntia
te05
.1. 0
5.1
Bal
lard
Loc
ksVe
ry H
igh
Hig
hVe
ry H
igh
Very
Hig
hTh
is p
ress
ure
is th
e pr
oxy
for t
he
Chi
ttend
en L
ocks
.C
ould
del
ay m
igra
tion;
salin
ity,
tem
p, p
hysi
cal b
arrie
r... B
IOP
says
it
is a
bar
rier.
Con
side
r sev
erity
in te
rms o
f st
ruct
ure
itsel
f but
als
o sa
linity
and
te
mp
exch
ange
bar
rier.
7.2.
7.2
Ter
rest
rial a
nd fr
eshw
ater
sp
ecie
s dis
turb
ance
s in
natu
ral
land
scap
es
Low
Low
Low
Low
Exis
ting
ripar
ian
area
s in
natu
ral
land
scap
es a
re li
kely
to re
mai
n pr
otec
ted.
Som
e m
inim
al ra
fting
an
d"sa
lmon
wat
chin
g" o
ccur
s on
Ced
ar R
iver
dur
ing
fall
mig
ratio
n an
d sp
awni
ng se
ason
, tho
ugh
effe
ct
on m
igra
tion
and
spaw
ning
is n
ot
likel
y to
be
extre
me.
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
9C- 10C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
11
21.1
. 21.
1 Po
int s
ourc
e, p
ersi
sten
t to
xic
chem
ical
s in
aqua
tic sy
stem
sLo
wLo
wH
igh
Low
Not
like
ly a
n ex
trem
e th
reat
to th
is
life
stag
e. P
resp
awn
mor
talit
y no
t kn
own
to b
e se
vere
for C
hino
ok
salm
on, t
houg
h co
ho sa
lmon
af
fect
ed st
rong
ly.
21.2
. 21.
2 N
on-p
oint
sour
ce,
pers
iste
nt to
xic
chem
ical
s in
aqua
tic
syst
ems
Low
Low
Hig
hLo
wno
t lik
ely
an e
xtre
me
thre
at to
this
lif
e st
age
22.1
. 22.
1 Po
int s
ourc
e, n
on-
pers
iste
nt to
xic
chem
ical
s in
aqua
tic
syst
ems
Low
Low
Hig
hLo
wN
ot li
kely
an
extre
me
thre
at to
this
lif
e st
age.
Pre
spaw
n m
orta
lity
not
know
n to
be
seve
re fo
r Chi
nook
sa
lmon
, tho
ugh
coho
salm
on
affe
cted
stro
ngly
.11
.2. 1
1.2
Alte
red
low
flow
s fro
m
clim
ate
chan
geLo
wM
ediu
mM
ediu
mLo
wN
OTE
: Ced
ar In
stre
am F
low
A
gree
men
t mai
ntai
ns m
inim
um
flow
s dur
ing
spaw
ning
seas
on. I
n ye
ars o
f ext
rem
e dr
ough
t, w
hen
Lake
leve
ls a
re m
anag
ed to
co
nser
ve w
ater
, the
re m
ay b
e so
me
smal
l effe
ct o
n pa
ssag
e th
roug
h Lo
cks f
acili
ty.
22.2
. 22.
2 N
on-p
oint
sour
ce, n
on-
pers
iste
nt to
xic
chem
ical
s in
aqua
tic
syst
ems
Low
Low
Hig
hLo
wSS
not
like
ly a
n ex
trem
e th
reat
to
this
life
stag
e
01.1
. 01.
1 C
onve
rsio
n of
land
cov
er
for r
esid
entia
l, co
mm
erci
al, a
nd
indu
stria
l use
Hig
hLo
wH
igh
Low
Mig
rato
ry p
athw
ays c
onsi
dere
d in
tact
(ass
umin
g La
ke W
ashi
ngto
n ba
sin
hydr
olog
y po
st c
onst
ruct
ion
of S
hip
Can
al is
new
'nor
mal
').
Con
vers
ion
of C
hino
ok h
abita
t re
flect
ed m
ore
stro
ngly
in o
ther
co
mpo
nent
s/ge
ogra
phie
s.07
.1. 0
7.1
Terr
estri
al a
nd fr
eshw
ater
sp
ecie
s dis
turb
ance
in h
uman
do
min
ated
are
as
Low
Low
Med
ium
Low
Som
e di
stur
banc
e by
peo
ple,
thei
r pe
ts, a
rtific
ial l
ight
, Sal
mon
w
atch
ers d
urin
g m
igra
tion.
... S
ize
of C
edar
like
ly li
mits
inte
ract
ions
so
mew
hat.
Tim
ing
of sp
awni
ng
(pea
king
in O
ctob
er) i
s usu
ally
afte
r m
ost r
ecre
atio
n on
the
river
has
en
ded.
24.2
. 24.
2 N
on-p
oint
sour
ce
conv
entio
nal w
ater
pol
luta
nts
Low
Low
Hig
hLo
wN
ot li
kely
an
extre
me
thre
at to
this
lif
e st
age
24.3
. 24.
3 C
hang
es in
wat
er
tem
pera
ture
from
loca
l cau
ses
Hig
hM
ediu
mH
igh
Med
ium
Ass
umin
g an
y an
d al
l wat
er te
mp
(not
just
loca
l cau
ses)
-Fo
cus o
n Lo
cks a
nd S
hip
Can
al;
Med
ium
seve
rity
here
for c
hino
ok;
high
er fo
r Sam
mam
ish
pop.
Way
s to
man
age
it in
loca
l are
as to
m
aint
ain
pops
in fo
rese
eabl
e fu
ture
. bu
t not
reve
rsib
le23
. 23
Larg
e Sp
ills
Low
Hig
hM
ediu
mLo
wLo
w p
roba
bilit
y ev
ent
10.1
. 10.
1 A
ltere
d pe
ak fl
ows f
rom
la
nd c
over
cha
nge
Low
Low
Hig
hLo
wN
ot a
n is
sue
for C
edar
pop
ulat
ion.
In
clud
ed h
ere
for c
ontra
st w
ith
Sam
mam
ish.
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
AP
PE
ND
IX C
11C- 12C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
10.1
. 10.
1 A
ltere
d pe
ak fl
ows f
rom
la
nd c
over
cha
nge
Low
Low
Hig
hLo
wN
ot a
n is
sue
for C
edar
pop
ulat
ion.
In
clud
ed h
ere
for c
ontra
st w
ith
Sam
mam
ish.
26.1
. 26.
1 C
hang
ing
air t
empe
ratu
reH
igh
Med
ium
Hig
hM
ediu
mSe
e ch
angi
ng w
ater
tem
pera
ture
no
tes f
or th
is li
fe st
age.
Effe
cts o
f ch
angi
ng a
ir te
mpe
ratu
re o
n fis
h fe
lt th
roug
h ch
angi
ng w
ater
te
mpe
ratu
re.
11.1
. 11.
1 A
ltere
d lo
w fl
ows f
rom
la
nd c
over
cha
nge
Low
Low
Hig
hLo
wA
ltere
d lo
w fl
ows f
rom
LC
cha
nge
not l
ikel
y to
hav
e m
uch
of a
n im
pact
on
this
life
stag
e.
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
11C- 12C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
13
11.3
. 11.
3 A
ltere
d lo
w fl
ows f
rom
w
ithdr
awal
sLo
wLo
wH
igh
Low
Low
flow
s dur
ing
incu
batio
n pe
riod
(fro
m w
ells
) are
pos
sibl
e,
pote
ntia
lly d
elay
ing
or p
reve
ntin
g m
igra
tion
to sp
awni
ng st
ream
s. H
owev
er, i
ncub
atio
n pe
riod
is le
ss
likel
y to
see
LOW
flow
s -- m
ore
likel
y to
see
high
flow
s. Se
e Tr
ibut
ary
stre
amflo
w d
ocum
ent
(Trib
utar
y St
ream
flow
Tec
hnic
al
Com
mitt
ee 2
006)
. Hig
hest
nee
d/im
porta
nce/
bene
fits t
o be
seen
in
Bea
r, EF
Issa
quah
, Iss
aqua
n an
d R
ock
Cre
ek. a
lso
augm
entin
g co
ld
wat
er in
flow
s to
Sam
mam
ish.
13.1
. 13.
1 In
cha
nnel
stru
ctur
al
barr
iers
to w
ater
, sed
imen
t, de
bris
flo
ws
Hig
hH
igh
Med
ium
Hig
h
13.2
. 13.
2 Le
vees
and
Rev
etm
ents
Hig
hH
igh
Hig
hH
igh
This
pre
ssur
e in
clud
es le
vees
and
re
vetm
ents
. Effe
ct o
n in
cuba
tion
to
the
exte
nt it
affe
cts h
ydra
ulic
s and
sc
our.
01.2
. 01.
2 C
onve
rsio
n of
land
cov
er
for n
atur
al re
sour
ces p
rodu
ctio
nLo
wLo
wLo
wLo
wC
urre
nt n
atur
al re
sour
ce p
rodu
ctio
n lim
ited
to sm
all t
imbe
r har
vest
ar
eas o
n D
NR
land
in u
pper
reac
hes
of Is
saqu
ah C
reek
and
its
tribu
tarie
s.10
.2. 1
0.2
Alte
red
peak
flow
s fro
m
clim
ate
chan
geM
ediu
mH
igh
Hig
hM
ediu
mIf
cha
ngin
g cl
imat
e br
ings
mor
e at
mos
pher
ic ri
ver/o
ther
hig
h flo
w
even
ts, c
ould
resu
lt in
incr
easi
ng
redd
scou
r and
dim
inis
hed
surv
ival
. M
anag
emen
t res
pons
e sh
ould
be
to
incr
ease
resi
lienc
e of
stre
am
ecos
yste
ms (
reco
nnec
t flo
od p
lain
s, in
crea
se w
ood
in st
ream
s, in
crea
se
ripar
ian
cove
r).
03. 0
3 Sh
orel
ine
hard
enin
gM
ediu
mH
igh
Very
Hig
hH
igh
Effe
ct o
n in
cuba
tion
to th
e ex
tent
it
affe
cts h
ydra
ulic
s and
scou
r. Sh
orel
ine
hard
enin
g sc
ores
hig
her
in ir
reve
rsib
ility
than
"ot
her
stru
ctur
al b
arrie
rs"
pres
sure
thou
gh
low
er in
scop
e (d
efin
ing
this
thre
at
to in
clud
e in
fras
truct
ure
in u
rban
ar
eas w
here
rem
oval
is u
nlik
ely
in
next
100
y).
S - I
nc &
Em
erge
Pres
sure
Scop
eSe
verit
yIrr
ever
sibi
lity
Sum
mar
y Pr
essu
re R
atin
gC
omm
ents
17.1
. 17.
1 Pr
edat
ion
from
incr
ease
d na
tive
spec
ies
Med
ium
Med
ium
Med
ium
Med
ium
pred
atio
n of
em
ergi
ng fr
y by
sc
ulpi
n --
no
evid
ence
of i
ncre
ased
na
tive
spp
(?)
17.2
. 17.
2 D
ispl
acem
ent b
y in
crea
sed
nativ
e sp
ecie
sLo
wLo
wH
igh
Low
l
La
ke
Wa
shin
gto
n/C
ed
ar/
Sa
mm
am
ish
Wa
ters
he
d (W
RIA
8) C
hin
oo
k S
alm
on
Co
nse
rva
tio
n P
lan
l
10
-YE
AR
UP
DA
TE
l
2
017
AP
PE
ND
IX C
13C- 14C-
AP
PE
ND
IX C
AP
PE
ND
IX C
-
11.3
. 11.
3 A
ltere
d lo
w fl
ows f
rom
w
ithdr
awal
sLo
wLo
wH
igh
Low
Low
flow
s dur
ing
incu
batio
n pe
riod
(fro
m w
ells
) are
pos
sibl
e,
pote
ntia
lly d
elay
ing
or p
reve
ntin
g m
igra
tion
to sp
awni
ng st
ream
s. H
owev
er, i
ncub
atio
n pe
riod
is le
ss
likel
y to
see
LOW
flow
s -- m
ore
likel
y to
see
high
flow
s. Se
e Tr
ibut
ary
stre
amflo
w d
ocum
ent
(Trib
utar
y St
ream
flow
Tec
hnic
al
Com
mitt
ee 2
006)
. Hig
hest
nee
d/im
porta
nce/
bene
fits t
o be
seen
in
Bea
r, EF
Issa
quah
, Iss
aqua
n an
d R
ock
Cre
ek. a
lso
augm
entin
g co
ld
wat
er in
flow
s to
Sam
mam
ish.
13.1
. 13.
1 In
cha
nnel
stru
ctur
al
barr
iers
to w
ater
, sed
imen
t, de
bris
flo
ws
Hig
hH
igh
Med
ium
Hig
h
13.2
. 13.
2 Le
vees
and
Rev
etm
ents
Hig
hH
igh
Hig
hH
igh
This
pre
ssur
e in
clud
es le
vees
and
re
vetm
ents
. Effe
ct o
n in
cuba
tion
to
the
exte
nt it
affe
cts h
ydra
ulic
s and
sc
our.
01.2
. 01.
2 C
onve
rsio
n of
land
cov
er
for n
atur
al re
sour
ces p
rodu
ctio
nLo
wLo
wLo
wLo
wC
urre
nt n
atur
al re
sour
ce p
rodu
ctio
n lim
ited
to sm
all t
imbe
r har
vest
ar
eas o
n D
NR
land
in u
pper
reac
hes
of Is
saqu
ah C
reek
and
its
tribu
tarie
s.10
.2. 1
0.2
Alte
red
peak
flow
s fro
m
clim
ate
chan
geM
ediu
mH
igh
Hig
hM
ediu
mIf
cha
ngin
g cl
imat
e br
ings
mor
e at
mos
pher
ic ri
ver/o
ther
hig
h flo
w
even
ts, c
ould
resu
lt in
incr
easi
ng
redd
scou
r and
dim
inis
hed
surv
ival
. M
anag
emen
t res
pons
e sh
ould
be
to
incr
ease
resi
lienc
e of
stre
am
ecos
yste
ms (
reco
nnec
t flo
od p
lain
s, in
crea
se w
ood
in st
ream
s, in
crea
se
ripar
ian
cove
r).
03. 0
3 Sh
orel
ine
hard
enin
gM
ediu
mH
igh
Very
Hig
hH
igh
Effe
ct o
n in
cuba
tion
to th
e ex
tent
it
affe
cts h
ydra
ulic
s and
scou
r. Sh
orel
ine
hard
enin
g sc
ores
hig
her
in ir
reve
rsib
ility
than
"ot
her
stru
ctur
al b
arrie
rs"
pres
sure
thou
gh
low
er in
scop
e (d
efin
ing
this
thre
at
to in
clud
e in
fras
truct
ure
in u
rban
ar
eas w
here
rem
oval
is u
nlik
ely
in
next
100
y).
S - I
nc &
Em
erge
Pres
sure
Scop
eSe
verit
yIrr
ever
sibi
lity
Sum
mar
y Pr
essu
re R
atin
gC
omm
ents
17.1
. 17.
1 Pr
edat
ion
from
incr
ease
d na
tive
spec
ies
Med
ium
Med
ium
Med
ium
Med
ium
pred
atio
n of
em
ergi
ng fr
y by
sc
ulpi
n --
no
evid
ence
of i
ncre
ased
na
tive
spp
(?)
17.2
. 17.
2 D
ispl
acem
ent b
y in
crea
sed
nativ
e sp
ecie
sLo
wLo
wH
igh
Low
11.2
. 11.
2 A
ltere
d lo
w fl
ows f
rom
cl
imat
e ch
ange
Med
ium
Med
ium
Hig
hM
ediu
mLo
w fl
ows d
urin
g w
inte
r mon
ths
are
poss
ible
(dew
ater
ing
redd
s) b
ut
clim
ate
mod
els d
o no
t pro
ject
this
el
emen
t to
incr
ease
.22
.2. 2
2.2
Non
-poi
nt so
urce
, non
-pe
rsis
tent
toxi
c ch
emic
als i
n aq
uatic
sy
stem
s
Hig
hM
ediu
mH
igh
Med
ium
See
non-
poin
t sou
rce
pers
iste
nt
chem
ical
s
24.2
. 24.
2 N
on-p
oint
sour
ce
conv
entio
nal w
ater
pol
luta
nts
Hig
hH
igh
Med
ium
Hig
hFo
cuse
d on
sedi
men
t (di
tche
s;
eros
ion
of st
ream
bank
s). P
erva
sive
bu
t rev
ersi
ble.
Gro
up o
n th
e fe
nce
for
irrev
ersi
bilty
- m
ediu
m o
r hig
h.SS
hig
hest
gen
eral
ly in
urb
an a
reas
10.1
. 10.
1 A
ltere
d pe
ak fl
ows f
rom
la
nd c
over
cha
nge
Hig
hH
igh
Hig
hH
igh
Incr
ease
d fla
shin
ess f
rom
incr
ease
d ur
bani
zatio
n lik
ely,
thou
gh
stor
mw
ater
regs
are
inte
nded
to
min
imiz
e or
pre
vent
such
impa
cts.
24.3
. 24.
3 C
hang
es in
wat
er
tem
pera
ture
from
loca
l cau
ses
Hig
hLo
wH
igh
Low
26.1
. 26.
1 C
hang
ing
air t
empe
ratu
reH
igh
Low
Hig
hLo
wSe
e ch
angi
ng w
ater
tem
pera
ture
no
tes f
or th
is li
fe st
age.
Effe
cts o
f ch
angi
ng a
ir te
mpe
ratu
re o
n fis
h fe
lt th
roug
h ch
angi
ng w
ater
te
mpe
ratu
re.
11.1
. 11.
1 A
ltere
d lo
w fl
ows f
rom
la
nd c
over
cha
nge
Med
ium
Med
ium
Hig
hM
ediu
mA
ltere
d lo
w fl
ows f
rom
land