Document 7388249
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Transcript Document 7388249
Middle Fork Project
AQ 2 – Fish Population
Technical Study Plan
Report Overview
March 10, 2008
Study Objectives
Document fish species composition,
distribution, and abundance in the
Project bypass and peaking
reaches.
Characterize fish growth, condition
factor, and population age structure
in the Project bypass and peaking
reaches.
Characterize fish species
composition, relative abundance,
and size in Project reservoirs and
diversion pools.
1
AQ 2 – Fish Population
Study Elements and Reports
Figure AQ 2-1. Fish Population Objectives, Related Study Elements, and Reports.
Study Objectives
Document fish species composition, distribution, and abundance in the bypass and peaking
reaches.
Characterize fish growth, condition factor, and population age structure in the bypass and peaking
reaches.
Characterize fish species composition, relative abundance, and size in Project reservoirs and
diversion pools.
Conduct 2007 Field Surveys
Conduct River
Sampling
Conduct Reservoir
Sampling
Conduct Diversion
Pool Sampling
Conduct Special
Purpose Qualitative
Sampling
Document 2007 findings in this Fish Population Report
Consult with Aquatic TWG
Determine which Sites
will be Sampled in
2008
Identify Appropriate River
Fish Standing Crop
Comparison Datasets
Complete 2008 Fish Population Field Studies
Document 2008 Fish Population Results in Fish Population Report (2009)
Consult with Aquatic TWG
Determine if Additional Sampling is Needed in 2009
Complete 2009 Fish Population Contingency Field Studies
Document 2009 Fish Population Results in Fish Population Report (2010)
2
Consultation Needs
Fish Population Sampling Sites
in 2008 (also hardhead
distribution)
Review 2006 data to determine
which sites will be sampling in
year 2 and possible year 3 to
identify the temporal abundance
of fish species.
3
Fish Population Study Sites
Rivers (21 Sites)
Reservoirs (4)
Diversion Pools (3)
Wide Scale Map
4
Survey Results
Distribution and Diversity
Abundance
Trout Biomass
Fish Population Comparison
Sites
Fish Size, Age, Growth and
Condition Factor
Timing of Fry
Others
Electrofishing versus Snorkeling
Small Stream Diversion Pool
Sampling
Species and Lifestage Periodicity
Chart
Water Temperature
5
Distribution and Diversity
Rivers
Project Bypass and Peaking
Others
Comparison Rivers
Above Small Stream Diversions
Diversity
Reservoirs
Hell Hole Reservoir, French
Meadows Reservoir, Middle
Fork Interbay, Ralston
Afterbay (see CPUE)
6
Rivers (Trout and Minnows)
Figure AQ 2-2. Fish Distribution in the Middle Fork American River, Rubicon River, Long Canyon Creek, North Fork
Long Canyon Creek, South Fork Long Canyon Creek, Duncan Creek, and Little Duncan Creek.
Wide Scale
Middle Fork American River below Ralston Afterbay
North Fork
American River
Confluence
Folsom Reservoir
Mammoth
Bar
Otter
Creek
Canyon
Creek
Volcano
Creek
NFMF
20.9
24.1
Ralston
Afterbay
Dam
1
Rainbow Trout & Brown Trout
Hardhead
Pikeminnow
California Roach
0
0
21
11
9
4.8
14.1
25.9
River Mile
Middle Fork American River above Ralston Afterbay
Ralston Afterbay
Potential
Barrier
Brushy
Canyon
26.4
30.4
Middle Fork
Interbay
French
Meadows
Reservoir
Duncan
Creek
Confluence
Rainbow Trout & Brown Trout
Hardhead
Pikeminnow
California Roach
26.2
36.2
44.7
39.7
Rubicon River
Long
Canyon
Creek
51.8
47.2
River Mile
Pilot
Creek
Potential
Barrier
Elicott
Bridge
Hell Hole
Reservoir
South Fork
Rubicon
Rainbow Trout & Brown Trout
Hardhead
Pikeminnow
California Roach
0
3.5
5.2
14.2
20.9 22.6
25.7
30.5
36.2
River Mile
Long Canyon Creek
Ramsey
Crossing
Long Canyon Creek
North Fork Long Canyon
Rainbow
Trout
1.9
3.1
Rainbow Trout
4.9
3.8
South Fork Long Canyon
Rainbow
Trout
Hardhead
2.3 3.2
Pikeminnow
4.2
8.55
River Mile
California Roach
0
5
9
11.4
River Mile
Duncan Creek
Little Duncan Creek
Rainbow Trout &
Brown Trout
Mosquito Ridge
Road
0
1.3
Rainbow Trout & Brown Trout
0
3
6.3
7.4
River Mile
=Present
= Uncertain
= Diversion dam
1
NFMF= North Fork of the Middle Fork American River
7
8.6
9.5
13.3
Small Streams
Rubicon River
Long
Canyon
Creek
Hell Hole
Reservoir
Duncan Creek
Long Canyon Creeks
Pilot
Creek
Potential
Barrier
Elicott
Bridge
South Fork
Rubicon
Rainbow Trout & Brown Trout
Hardhead
Pikeminnow
California Roach
0
3.5
5.2
14.2
20.9 22.6
25.7
30.5
36.2
River Mile
Wide Scale
Long Canyon Creek
Ramsey
Crossing
Long Canyon Creek
North Fork Long Canyon
Rainbow
Trout
1.9
3.1
Rainbow Trout
4.9
3.8
South Fork Long Canyon
Rainbow
Trout
Hardhead
2.3 3.2
Pikeminnow
4.2
8.55
River Mile
California Roach
0
5
9
11.4
River Mile
Duncan Creek
Rainbow Trout & Little Duncan Creek
Brown Trout
Mosquito Ridge
Road
0
1.3
Rainbow Trout & Brown Trout
0
3
6.3
7.4
River Mile
=Present
= Uncertain
= Diversion dam
1
NFMF= North Fork of the Middle Fork American River
8
8.6
9.5
13.3
Large Rivers
Middle Fork American River
Rubicon River
Figure AQ 2-2. Fish Distribution in the Middle Fork American River, Rubicon River, Long Canyon Creek, North Fork
Long Canyon Creek, South Fork Long Canyon Creek, Duncan Creek, and Little Duncan Creek.
Wide Scale
Middle Fork American River below Ralston Afterbay
North Fork
American River
Confluence
Folsom Reservoir
Mammoth
Bar
Canyon
Creek
Otter
Creek
Volcano
Creek
NFMF1
14.1
20.9
24.1
Ralston
Afterbay
Dam
Rainbow Trout & Brown Trout
Hardhead
Pikeminnow
California Roach
0
21 0
9
4.8
11
25.9
River Mile
Middle Fork American River above Ralston Afterbay
Ralston Afterbay
Potential
Barrier
Brushy
Canyon
Middle Fork
Interbay
French
Meadows
Reservoir
Duncan
Creek
Confluence
Rainbow Trout & Brown Trout
Hardhead
Pikeminnow
California Roach
26.2 26.4
30.4
36.2
44.7
39.7
Rubicon River
Long
Canyon
Creek
51.8
47.2
River Mile
Pilot
Creek
Potential
Barrier
Elicott
Bridge
Hell Hole
Reservoir
South Fork
Rubicon
Rainbow Trout & Brown Trout
Hardhead
Pikeminnow
California Roach
0
3.5
5.2
14.2
20.9 22.6
River Mile
9 Creek
Long Canyon
25.7
30.5
36.2
Diversity Rivers
Wide Scale
Table AQ 2-4. Summary of Fish Species Observed during the 2007 Fish Population Sampling (●).
Study Site
DATE
Sample
Type 1
Fish Species2
RBT
BNT
HH
SPM
MXD
SS
SCULP
●
●
●
●
●
●
●
●
●
●
SD
CAR
SMB
GSUN
KOK
TCB
LKT
WCF
SMB
GSUN
KOK
TCB
LKT
WCF
Middle Fork American River Downstream of Ralston Afterbay
●
Fish MF4.8
10/3/07
QUANT
Fish MF4.8
10/3/07
QUAL
Fish MF14.1
10/2/07
QUANT
●
Otter Creek at MF14.1
10/2/07; 10/16/07
QUAL
●
Gas Canyon
5/7/07
QUAL
●
●
●
●
●
●
●
●
●
Middle Fork American River from Middle Fork Interbay to Ralston Afterbay
Fish MF26.2
9/18/07
QUANT
●
●
●
●
●
●
●
●
●
MFAR upstream of
Ralston Afterbay
6/5/07; 6/25/07;
7/16/07
QUAL
●
●
●
●
●
●
●
●
●
MF at rm 29.4
10/24/07
QUAL
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Middle Fork American River Upstream of Middle Fork Interbay
Fish MF36.2
9/21/07
QUANT
Fish MF44.7
9/26/07
QUANT
Fish MF51.8
10/11/07
QUANT
●
●
●
●
●
●
●
Rubicon River
Rubicon upstream of
Ralston Powerhouse
5/11/07; 6/7/07;
6/27/07;7/17/07
QUAL
Rubicon at rm 3.5
6/12/07
QUAL
Fish R3.5
9/17/07
QUANT
Rubicon at rm 5.2
10/24/07
QUAL
Rubicon at rm 9.9
9/27/2007
QUAL
Rubicon at rm 14.3
9/27/2007
QUAL
Fish R20.9
9/19/2007
QUANT
Fish R25.7
9/25/07
QUANT
Fish R36.2
9/27/07
QUANT
●
●
●
●
●
●
●
10/8/07
QUANT
●
QUANT
●
●
●
●
●
●
●
●
●
●
●
●
Long Canyon Creek
Fish LC9.0
North Fork Long Canyon Creek
Fish NFLC1.9
8/30/07
Fish
NFLC3.8
9/5/07of Fish Species
QUANT
Observed
AQ 2-4. Summary
Table
● during the 2007 Fish Population Sampling (●) (Continued).
NFLC upstream
of
Study Site
diversion pool
5/17/07;
6/16/07;
DATE
6/26/07
Sample
QUAL
Type 1
Fish Species2
●
RBT
BNT
HH
SPM
SS
MXD
SCULP
SD
CAR
Creek
Long Canyon
QUAL Fork
= Qualitative
Sampling
(multi-pass electrofishing, multiple lane snorkeling, and gill netting); QUANT = Quantitative sampling (snorkeling, single pass electrofishing, or seining)
1South
2
Species:
RBT = Rainbow Trout;
BNT = Brown Trout;
HH = Hardhead;
QUANT
8/28/07
SFLC2.3
Fish
● SPM = Sacramento Pike Minnow; MXD = Mixed Minnow; SS = Sacramento Sucker; SCULP = Sculpin; SD = Speckled Dace; CAR = California Roach; SMB =
Smallmouth Bass; GSUN = Green Sunfish; KOK = Kokanee; TCB = Tui Chub; LKT = Lake Trout; WCF = White Catfish
QUANT
●
QUAL
●
9/6/07
QUANT
●
●
9/7/07
QUANT
●
●
●
●
Fish SFLC4.2
8/29/07
rm = River
Mile of
upstream
SFLC
diversion pool
Duncan Creek
5/17/07; 6/16/07;
6/26/07
Fish D6.3
Fish D9.0
3
5/17/07; 6/16/07;
Duncan usptream of
QUAL
6/26/07
diversion pool
North Fork of the Middle Fork American River
Fish NFMF2.3
10/1/07
QUANT
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
North Fork American River
●
Fish NF18.4
10/9/07
QUANT
Fish NF31.3
10/21/07
QUANT
NF at rm 31.3
10/21/07
QUAL
Fish NF53.7
8/31/07
QUANT
●
NFLC
9/4/07
QUANT
dry
SFLC
9/4/07
QUANT
●
Duncan
10/2/2007;
10/26/2007
QUANT
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Diversion Pools
Reservoirs
Ralston
9/13/07-9/14/07
Gillnetting
●
●
Interbay
9/20/07-9/21/07
Gillnetting
●
●
French Meadows
9/11/07-9/13/07
Gillnetting
●
●
Hell Hole
9/10/07-9/12/07
Gillnetting
●
●
●
●
●
●
●
●
●
●
●
1
QUAL = Qualitative Sampling (multi-pass electrofishing, multiple lane snorkeling, and gill netting); QUANT = Quantitative sampling (snorkeling, single pass electrofishing, or seining)
2
Species: RBT = Rainbow Trout; BNT = Brown Trout; HH = Hardhead; SPM = Sacramento Pike Minnow; MXD = Mixed Minnow; SS = Sacramento Sucker; SCULP = Sculpin; SD = Speckled Dace; CAR = California Roach; SMB =
Smallmouth Bass; GSUN = Green Sunfish; KOK = Kokanee; TCB = Tui Chub; LKT = Lake Trout; WCF = White Catfish
3
rm = River Mile
10
Diversity & Abundance
Reservoirs
Figure AQ 2-5. Gill Netting Catch per Unit Effort (CPUE) (Fish per hour) for Fish Species1 in Hell Hole
Reservoir, French Meadows Reservoir, Middle Fork Interbay, and Ralston Afterbay.
Total Reservoir CPUE
1.2
CPUE (fish / hour)
1
TCB
SPM
HH
SS
RBT, BNT, KOK, LKT
0.8
0.6
0.4
0.2
0
French Meadow s
Reservoir
Middle Fork Interbay
1
Ralston Afterbay
Hell Hole Reservoir
TCB = Tui Chub; SPM = Sacramento Pikeminnow ; HH = Hardhead, SS = Sacramento Sucker, RBT = Rainbow Trout, BNT = Brow n
Trout; KOK = Kokanee Salmon; LKT = Lake Trout
11
Trout Abundance/Biomass Rivers
Wide Scale
Figure AQ 2-3. The Density and Biomass of Trout in the Study Streams.
Trout pe r Mile
7000
YOY
Long Canyon Creeks
Number of trout per mile
6000
Adult
Middle Fork American River
and North Fork American River
below the Conf luence
5000
4000
Duncan Creek
3000
Rubicon River
2000
Comparison Rivers
1000
Trout pe r Acre
4000
Long Canyon Creeks
YOY
3500
Number of trout per acre
NF53.7
NF31.3
NFMF2.3
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
NFLC1.9
LC9.0
R36.2
R25.7
R20.9
R3.5
MF51.8
MF44.7
MF36.2
MF26.2
MF14.1
NF18.4
MF4.8
0
Adult
3000
2500
2000
Middle Fork American River
and North Fork American River
below the Conf luence
1500
Duncan Creek
1000
Rubicon River
Comparison Rivers
500
NF53.7
NF31.3
NFMF2.3
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
NFLC1.9
LC9.0
R36.2
R25.7
R20.9
R3.5
MF51.8
MF44.7
MF36.2
MF26.2
MF14.1
MF4.8
NF18.4
0
Total Biom ass (pounds per m ile)
400
Middle Fork American River and North Fork
American River below the Conf luence
350
pounds per mile
300
Rubicon River
250
200
Long Canyon Creeks
150
Duncan Creek
Comparison Rivers
100
50
NF53.7
NF31.3
NFMF2.3
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
NFLC1.9
LC9.0
R36.2
R25.7
R3.5
R20.9
MF51.8
MF44.7
MF36.2
MF26.2
MF14.1
MF4.8
NF18.4
0
Trout Biom as s (pounds pe r acre )
Long Canyon Creeks
70
60
Middle Fork American River
and North Fork American River
below the Conf luence
50
Duncan Creek
40
30
Rubicon River
20
Comparison Rivers
10
12
NF53.7
NF31.3
NFMF2.3
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
NFLC1.9
LC9.0
R36.2
R25.7
R3.5
R20.9
MF51.8
MF44.7
MF36.2
MF26.2
MF14.1
MF4.8
0
NF18.4
pounds per acre
Hardhead/Pikeminnow Abundance
Ralston Afterbay
6 Hardhead
5 Pikeminnow
Large River Sites
Table D-1. Summary of Fish Sampled at River Sampling Sites.
Study Site
DATE
Sam ple
Type 2
RBT
BNT
HH
SPM
MXD
SS
SCULP
450
610
5
2
10
2
5
SD
CAR
SMB GSUN WCF
Middle Fork Am erican River Dow nstream of Ralston Afterbay
Fish MF4.8
10/3/07
QUANT
Fish MF4.8
10/3/07
QUAL
Fish MF14.1
10/2/07
QUANT
196
Otter Creek at MF14.1 10/2/07; 10/16/07
QUAL
2
Gas Canyon
QUAL
65
5/7/07
104
14
2
44
2
20
3
1
23
3
Middle Fork Am erican River from Middle Fork Interbay to Ralston Afterbay
Fish MF26.2
9/18/07
QUANT
81
3
1
22
60
37
MFAR upstream of
6/5/07; 6/25/07;
QUAL
10
7
44
99
121
91
Ralston Afterbay
7/16/07
MFAR
29.4 Summary
10/24/07
QUALat River
15 Sampling
10
Sites (Continued).
of Fish Sampled
TableatD-1.
Middle Fork Am erican River Upstream of Middle Fork Interbay
Sam ple
SS
MXD
HH SPM
BNT
RBT
Study Site
Fish MF36.2
9/21/07DATE
QUANT
226
27
Type 2
Fish MF44.7
9/26/07
QUANT
72
96
South Fork Long Canyon Creek
Fish MF51.8
10/11/07
QUANT
308
244
436
QUANT
8/28/07
Fish SFLC2.3
Rubicon
River
366
QUANT
8/29/07
Fish SFLC4.2
Rubicon upstream of 5/11/07; 6/7/07;
QUAL
4
34
114
163
30
6/16/07;
5/17/07;
of
upstream
SFLC
Ralston Pow erhouse 6/27/07;7/17/07
52
QUAL
6/26/07
diversion pool
Rubicon at RM 3.5
6/12/07
QUAL
23
Duncan Creek
Fish
9/17/07
QUANT
54
1
8
1
53
225
QUANT
9/6/07
D6.3
Fish R3.5
Fish
D9.0
Fish R20.9
Fish
R25.7
usptream of
Duncan
9/19/2007
9/7/07
9/25/07
5/17/07; 6/16/07;
QUANT
QUANT
QUANT
QUAL
Fish
R36.2pool
9/27/07
QUANT
6/26/07
diversion
Long
the Middle Fork Am erican River
Fork of Creek
North Canyon
302
209
131
25
178
Fish LC9.0
10/8/07
10/1/07
NFMF2.3
North Fork Long
Canyon
Creek
River
Am erican
QUANT
656
106
NF18.4
Fish NFLC1.9
10/9/07
8/30/07
QUANT
52
344
NF31.3
Fish NFLC3.8
10/21/07
9/5/07
QUANT
3
284
NF at 31.3
NFLC
upstream of
Fish NF53.7
diversion
pool
10/21/076/16/07;
5/17/07;
8/31/07
6/26/07
QUAL
QUAL
QUANT
9
44
50
2
13
SCULP
SD
32
11
56
1
11
17
10
9
19
3
13
CAR SMB GSUN WCF
0
19
1
14
34
27
109
138
6
1
58
24
2
1112
251
6
6
3
4
2
16
15
88
12
63
26
2
10
Species: RBT = Rainbow Trout; BNT = Brow n Trout: HH = Hardhead; SPM = Sacramento Pike Minnow ; MXD = Mixed Minnow ; SS = Sacramento
Catfish
WCF
Sunfish;
= Green
GSUN
Bass;
= Smallmouth
SMB
Roach;
California
CAR =HH
Dace;
= Speckled
Sculpin; SD
Sucker;
Species:SCULP
RBT ==Rainbow
Trout;
BNT = Brow
n Trout:
= Hardhead;
SPM
= Sacramento
Pike
Minnow
; MXD
= Mixed
Minnow
; SS= =White
Sacramento
Sucker;
SCULP = Sculpin; SD = Speckled Dace; CAR = California Roach; SMB = Smallmouth Bass; GSUN = Green Sunfish; WCF = White Catfish
2
QUAL= Qualitative Sampling; QUANT = Quantitative sampling
2
QUAL= Qualitative Sampling; QUANT = Quantitative sampling
1
3
Several small hardhead w ere qualitativly captured w ith a dipnet
13
Fish Population
Comparison Sites
Upstream and Downstream
Diversions Sites
South Fork Long Canyon
Diversion
North Fork Long Canyon
Diversion
Duncan Creek Diversion
Upstream and Downstream
of Reservoir Sites
French Meadows Reservoir
Hell Hole Reservoir
Comparison River Sites
Versus Peaking or Bypass
Reach Sites
14
Physical Comparability of
River Comparison Sites
Wide Scale
Fish MF44.7
Middle Fork American below French Meadows
Fish MF51.8
Middle Fork American above French Meadows
Fish R25.7
Rubicon below Hell Hole
Fish R36.2
Rubicon above Hell Hole
Fish NFLC1.9
North Fork Long Canyon below diversion
Fish NFLC3.8
North Fork Long Canyon above diversion
Fish SFLC2.3
South Fork Long Canyon below diversion
Fish SFLC4.2
South Fork Long Canyon above diversion
Fish D6.3
Duncan below diversion
Fish D9.0
Duncan above diversion
Fish MF4.8
Middle Fork American above Mammoth Bar
Fish NF31.3
North Fork American at Ponderosa Bridge
Fish MF14.1
Middle Fork American at Otter Creek
Fish NF31.3
North Fork American at Ponderosa Bridge
Fish NF18.4
North Fork American below Middle Fork American Confluence
Fish NF31.3
North Fork American at Ponderosa Bridge
Fish MF26.2
Middle Fork American above Ralston
Fish NFMF2.3
North Fork Middle Fork American at Circle Bridge
Fish R3.5
Rubicon at Long Canyon
Fish NF53.7
Upper North Fork American
Fish R20.9
Rubicon at Ellicott Bridge
Fish NF53.7
Upper North Fork American
Comparison Site
Description
Bypass Reach
Comparison
Study Sites
Peaking Reach
Table AQ 2-3. Validity of Comparison Study Sites and their Associated Bypass and Peaking Reach Study Sites Based on Physical Habitat Characteristics.
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Validity of Study Site Comparison
Rationale
By Length
By Area
Poor
Poor
Dissimilar channel type, slope, and pool depth. Similar wetted width.
Poor
Poor
Dissimilar channel type, slope, wetted width, and pool depth.
Moderate
Moderate
Good
Good
Similar channel type, slope, wetted width, and pool depth.
Good
Poor
Similar channel type, slope, and pool depth. Dissimilar wetted width.
Moderate
Moderate
Good
Good
Similar channel type, slope, wetted width, and pool depth.
Good
Good
Similar channel type, slope, wetted width, and pool depth.
Good
Good
Similar channel type, slope, wetted width, and pool depth.
Good-Moderate
Good-Moderate
Similar channel type, wetted width, and pool depth. Moderatly dissimilar slope.
Good-Moderate
Good-Moderate
Similar channel type, wetted width, and pool depth. Moderatly dissimilar slope.
15
Similar channel type, wetted width, and pool depth. Dissimilar slope.
Similar channel type and slope. Dissimilar wetted width and pool depth.
Abv & Blw Diversions
Figure AQ 2-6. The Density and Biomass of Trout Above and Below Small Stream Diversions.
6000
Number of trout per mile
5000
NF Long Cyn
Blw Diversion
Trout per Mile
SF Long Cyn
Adult
YOY
Abv Diversion
Blw Diversion
Duncan Crk
Abv Diversion
4000
Blw Diversion
3000
Abv Diversion
2000
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC1.9
0
NFLC3.8
1000
Trout per Acre
4000
Abv Diversion
Adult
YOY
Number of trout per acre
3500
Blw Diversion
Blw Diversion
3000
Abv Diversion
2500
2000
1500
Abv Diversion
1000
Blw Diversion
500
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
NFLC1.9
0
Biomass (pounds per mile)
120
Blw Diversion
All Trout
100
Abv Diversion
Abv Diversion
Blw Diversion
Blw Diversion
Abv Diversion
pounds per mile
80
60
40
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC1.9
0
NFLC3.8
20
Biomass (pounds per acre)
Blw Diversion
70
Abv Diversion
Blw Diversion
All Trout
Abv Diversion
50
Abv Diversion
40
30
Blw Diversion
20
10
16
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
0
NFLC1.9
pounds per acre
60
D9.0
D6.3
SFLC4.2
SFLC2.3
0
NFLC3.8
1000
Abv & Blw Diversions
(Linear Estimates only)
NFLC1.9
Number
2000
Figure AQ 2-6. The Density and Biomass of Trout Above and Below Small Stream Diversions.
6000
4000
Number
Numberof
oftrout
trout per
per acre
mile
5000
3500
NF Long Cyn
Trout per Mile
Trout per Acre
Diversion
SF LongAbvCyn
Blw Diversion
YOY
YOY
Blw Diversion
Blw Diversion
3000
4000
Adult
Adult
Abv Diversion
Blw Diversion
Duncan Crk
Abv Diversion
Abv Diversion
2500
Blw Diversion
3000
2000
Abv Diversion
1500
2000
Abv Diversion
1000
Blw Diversion
pounds per
mile per acre
Number
of trout
Blw Diversion
Adult
All Trout YOY
Abv Diversion
Blw Diversion
Abv Diversion
Blw Diversion
Abv Diversion
D9.0
D9.0
D6.3
D6.3
SFLC4.2
SFLC4.2
per per
Acremile)
BiomassTrout
(pounds
Abv Diversion
4000
120
Blw Diversion
3500
100
3000
SFLC2.3
SFLC2.3
NFLC1.9
NFLC1.9
00
NFLC3.8
NFLC3.8
1000
500
Blw Diversion
Abv Diversion
80
2500
2000
60
1500
Abv Diversion
40
1000
Blw Diversion
20500
All Trout
All Trout
70
Abv Diversion
60
Abv Diversion
Blw Diversion Abv Diversion
Blw Diversion
r ile
acre
17
Abv Diversion
Blw Diversion
Abv Diversion
80 50
D9.0
Biomass(pounds
(poundsper
peracre)
mile)
Biomass
BlwBlw
Diversion
Diversion
100
D9.0
D6.3
D6.3
SFLC4.2
SFLC4.2
SFLC2.3
SFLC2.3
NFLC3.8
NFLC3.8
NFLC1.9
120
NFLC1.9
0
0
150
200
150
100
100
50
0
30
50
Peaking Reach Sites
0
Peaking Reach Sites
Biomass (pounds per acre)
Biomass (pounds
18 per mile)
Adult
All
Fish
Bypass River Sites
NF53.7
NF53.7
Comparison
ComparisonRiver
River Site
Site
Bypass
RiverSite
Site
Bypass River
Bypass River Sites
Comparison
River
Site
Comparison
River
Site
Bypass River Sites
Comparison
Comparison
River Site River Site
R20.9
R20.9
R3.5
R3.5
NFMF2.3
NFMF2.3
MF26.2
MF26.2
Abv HH Res
Abv
Res
Blw
Blw
HHHH
Res
Res
Bypass River Sites
NF53.7
NF53.7
R20.9
R20.9
Comparison
River
Comparison
RiverSite
Site
Bypass
Bypass
RiverRiver
Site Site
Peaking Reach Sites
R3.5
R3.5
NFMF2.3
NFMF2.3
MF26.2
MF26.2
Peaking Reach Sites
Comparison
ComparisonRiver
RiverSite
Site
Peaking Reach Sites
NF31.3
NF31.3
MF14.1
MF14.1
MF4.8
MF4.8
NF18.4
NF18.4
R36.2
R36.2
150
Comparison
River
River
Site Site
NF31.3
NF31.3 Comparison
Abv HH Res
829
Adult
Adult
te
200
250
Figure AQ 2-7. Comparison of Trout Density and Biomass Between Study Sites and Potential Comparison
Sites.
NF53.7
R20.9
R3.5
Compari
Co
Bypass
MF26.2
NFMF2.3
Comparison Ri
NF31.3
MF14.1
MF4.8
NF18.4
R36.2
R25.7
MF51.8
MF44.7
Number
River Comparison
Peaking Reach Sites
ite
300
Abv HH Res
50
MF14.1
MF14.1
350
Abv
FM
Res
Abv
FM
Res
829
4347
MF4.8
MF4.8
250
R25.7
R25.7
100
500
NF18.4
NF18.4
400
300
Sites
R36.2
R36.2
450
350
Blw HH Res
Blw HH Res
200
1000
R25.7
R25.7
0
0
MF51.8
MF51.8
250
Abv FM Res
450
Abv FM Res
500
2500
MF51.8
MF51.8
300
1500
Blw Blw
FM FM
ResRes
350
MF44.7
MF44.7
400
2000
Blw FM Res Blw FM Res
Number
Numberofoftrout
troutper
permile
acre
0
MF44.7
MF44.7
pounds
perper
mile
Number
of trout
acre
500 Other
1000
Trout per Acre
Trout per Mile
YOY
YOY
500
400
Biomass (pounds per mile)
Trout per Acre
YOY
Trout Size Rivers & Streams
19
Trout Age and Growth Rivers
Figure AQ 2-10. Age and Grow th Rates of Rainbow Trout for all Study Sites 1 (Top), Middle Fork Am erican River and
Rubicon River Sites (Middle), and Sm all Stream s Sites (Bottom ).
All Study Sites
400
350
length (mm)
300
250
200
150
M F14.1
M F44.7
R20.9
LC9.0
SFLC2.3
D9.0
100
50
0
0+
1+
2+
M F26.2
M F51.8
R25.7
NFLC1.9
SFLC4.2
NFM F2.3
3+
M F36.2
R3.5
R36.2
NFLC3.8
D6.3
NF53.7
4+
Age Class
Middle Fork Am erican River and Rubicon River Sites
400
350
length (mm)
300
250
200
150
100
50
M F14.1
M F26.2
M F36.2
M F44.7
M F51.8
R3.5
R20.9
R25.7
R36.2
0
0+
1+
2+
3+
4+
Age Class
Sm all Stream Sites
400
350
length (mm)
300
250
200
150
100
50
LC9.0
NFLC1.9
NFLC3.8
SFLC2.3
SFLC4.2
D9.0
D6.3
0
0+
1
1+
2+
Age Class
Age and grow th rate data is unavailable for sites MF4.8, NF18.4, and NF31.3
20
3+
4+
Trout Condition Factors in Rivers
Table AQ 2-9. Rainbow Trout (RBT) and Brown Trout (BNT) Condition Factors.
Study River and Sample ID
RBT
BNT
Condition
n
Factor
Middle Fork American River Dow nstream of Ralston Afterbay
Condition
Factor
---
NA 1
1.02
24
Middle Fork American River Upstream of Middle Fork Interbay
1.31
2
Fish MF36.2
1.04
43
1.05
1
Fish MF44.7
1.06
5
1.07
25
Fish MF51.8
1.07
15
1.05
3
Fish R3.5
1.06
11
--
Not Observed
Fish R20.9
1.05
98
1.14
4
Fish R25.7
1.09
27
1.13
6
Fish R36.2
1.08
38
0.98
1
1.10
81
--
Not Observed
Fish NFLC1.9
1.05
79
--
Not Observed
Fish NFLC3.8
1.04
113
--
Not Observed
1.09
46
--
Not Observed
1.11
25
--
Not Observed
1.16
82
1.06
3
1.11
North Fork of the Middle Fork American River
83
1.07
13
Fish NFMF2.3
1.09
22
--
Not Observed
Fish NF18.4
--
NA 1
--
NA 1
Fish NF31.3
--
NA 1
--
NA 1
1.10
16
NA = snorkel only site, no w eights w ere collected to calculate biomass
--
Not Observed
Fish MF4.8
Fish MF14.1
NA 1
n
-1.01
10
Middle Fork American River from Middle Fork Interbay to Ralston Afterbay
Fish MF26.2
NA 1
Rubicon River
Long Canyon Creek
Fish LC9.0
North Fork Long Canyon Creek
South Fork Long Canyon Creek
Fish SFLC2.3
Fish SFLC4.2
Duncan Creek
Fish D9.0
Fish D6.3
North Fork American River
Fish NF53.7
1
21
Reservoir Trout Size
330 mm
12 in
480 mm
18 in
22
660 mm
24 in
Timing of Fry
Rainbow and Brown Trout
Fry
Figure AQ 2-11. Minimum Fork Lengths of Young-of-the-Year Caught during Qualitative Sampling 1
Surveys.
Rainbow Trout
Fork Length (mm)
60
50
40
30
20
10
0
7/12/07
7/19/07
7/12/07
7/19/07
Duncan
7/5/07
Date
NFLC SFLC
6/28/07
6/21/07
Rubicon
6/14/07
Gas Canyon
6/7/07
5/31/07
5/24/07
5/17/07
5/10/07
MFAR
Survey Date
Brow n Trout
Fork Length (mm)
60
50
40
30
20
10
0
Gas Canyon
Hardhead
Length (mm)
60
50
40
30
20
23
Survey Date
7/5/07
MFAR
6/28/07
6/21/07
6/14/07
6/7/07
5/31/07
5/24/07
5/17/07
5/10/07
Date
For
10
0
7/12/07
7/19/07
7/12/07
7/19/07
7/5/07
6/28/07
6/21/07
6/14/07
6/7/07
5/31/07
5/24/07
5/17/07
5/10/07
Timing of Fry
Date
Hardhead-Pikeminnow
MFAR
Gas Canyon
Survey Date
Hardhead
Fork Length (mm)
60
50
40
30
20
10
0
7/5/07
6/28/07
6/21/07
6/14/07
6/7/07
5/31/07
5/24/07
5/17/07
5/10/07
Date
1
Caught
Young-of-the-Year
Figure AQ 2-11. Minimum Fork Lengths ofMFAR
Rubicon Survey
Date during Qualitative Sampling
Surveys (continued).
Sacramento Pikeminnow
MFAR =Middle Fork American River upstream
of Ralston Afterbay; Gas Canyon = Gas Canyon Creek; Rubicon
35
= Rubicon River upstream of Ralston Powerhouse; NFLC = North Fork Long Canyon upstream of diversion pool;
30
SFLC = South Fork Long Canyon upstream of diversion pool; Duncan =Duncan Creek usptream of diversion pool
Fork Length (mm)
1
25
20
15
10
5
0
6/28/07
7/5/07
7/12/07
7/19/07
6/28/07
7/5/07
7/12/07
7/19/07
6/21/07
6/14/07
6/7/07
5/31/07
5/24/07
5/17/07
5/10/07
Date
Rubicon
MFAR
Survey Date
Mixed Minnow
Fork Length (mm)
25
20
15
10
5
0
6/21/07
6/14/07
6/7/07
5/31/07
5/24/07
5/17/07
5/10/07
Date
MFAR
Rubicon
Survey Date
MFAR =Middle Fork American River upstream of Ralston
24 Afterbay; Rubicon = Rubicon River upstream of
1
Other Survey Results
Electrofishing Versus
Snorkeling
Small Stream Diversion
Pool Sampling
Species and Lifestage
Periodicity
Water Temperature
25
Species/Lifestage Periodicity
Table AQ 2-12. Species and Life Stage Periodicities.
Month
Species
Life Stage
OCT
NOV
DEC
JAN
FEB
Rainbow Trout
Spawning
Incubation
Fry
Juvenile
Adult
Brown Trout
Spawning
Incubation
Fry
Juvenile
Adult
Sacramento Pike Minnow
Spawning
Incubation
Fry
Juvenile
Adult
Hardhead
Spawning
Fry
Juvenile
Adult
California Roach
Spawning
Incubation
Fry
Juvenile
Adult
Sacramento Sucker
Spawning
Incubation
Fry
Juvenile
Adult
Speckled Dace
Spawning
Incubation
Fry
Juvenile
Adult
Foothill Yellow-Legged Frog
Breeding
Incubation
Tadpoles
Juvenile
Adult
26
MAR
APR
MAY
JUN
JUL
AUG
SEP
Reach-Specific Density
Figure AQ 2-4. Trout Density Using Reach-Specific and Site-Specific Population Estimates. Reach-Specific Estimates
were Scaled Using Reach-Based Mesohabitat Length Percentages.
Trout Densities per Mile
7000
Number of trout per mile
6000
Reach Specific
Long Canyon Creeks
Middle Fork American River and
North Fork American River below
the Confluence
Site Specific
5000
4000
Duncan Creek
Rubicon River
Comparison
Rivers
3000
2000
NF53.7
NF31.3
NFMF2.3
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
NFLC1.9
LC9.0
R36.2
R25.7
R20.9
R3.5
MF51.8
MF44.7
MF36.2
MF26.2
MF14.1
MF4.8
0
NF18.4
1000
Trout Densities per Acre
4500
Long Canyon Creeks
Reach Specific
4000
Site Specific
3000
2500
2000
Middle Fork American River and
North Fork American River below
the Confluence
Duncan Creek
1500
Rubicon River
Comparison
Rivers
1000
27
NF53.7
NF31.3
NFMF2.3
D9.0
D6.3
SFLC4.2
SFLC2.3
NFLC3.8
NFLC1.9
LC9.0
R36.2
R25.7
R20.9
R3.5
MF51.8
MF44.7
MF36.2
MF26.2
MF14.1
0
MF4.8
500
NF18.4
Number of trout per acre
3500