chinook salmon, the fish screen, and a vanishing river. paddy murphy idaho department of fish and...
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Chinook Salmon, the Fish Screen, Chinook Salmon, the Fish Screen, and a Vanishing River.and a Vanishing River.
Paddy MurphyPaddy MurphyIdaho Department of Fish and GameIdaho Department of Fish and Game
Anadromous Screen ProgramAnadromous Screen ProgramSalmon, IdahoSalmon, Idaho
LemhiLemhi River River
9 0 9 18 27 Miles
N
EW
S
Salmon RiverMiddle Fork to North Fork
North Fork Salmon River
Salmon RiverNorth Fork to Lemhi River
Lemhi River
Salmon RiverLemhi River to
Pahsimeroi River
Pahsimeroi River
Salmon RiverPahsimeroito East Fork
Yankee Fork of Salmon River
East Fork Salmon River
Salmon RiverEast Fork to Yankee ForkSalmon River
Yankee Forkto Headwaters
Upper Salmon RiverPriority Sub-basins and River Reaches
Lemhi River L-05 USGS Gage - Mean Daily Discharge (CFS)
0.0
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
3/1 3/16 3/31 4/15 4/30 5/15 5/30 6/14 6/29 7/14 7/29
Date
Dis
char
ge (
CF
S)
13 Year Avg. (1993-2006)
L-06 DiversionL-06 Diversion
L-06 Diversion – Obermeyer WeirL-06 Diversion – Obermeyer Weir
L-06 Diversion – Low waterL-06 Diversion – Low water
Lemhi River L-05 USGS Gage - Mean Daily Discharge (CFS)
0.0
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
3/1 3/16 3/31 4/15 4/30 5/15 5/30 6/14 6/29 7/14 7/29
Date
Dis
char
ge (
CF
S)
13 Year Avg. (1993-2006)
2004
Lemhi River L-05 USGS Gage - Mean Daily Discharge (CFS)
0.0
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
3/1 3/16 3/31 4/15 4/30 5/15 5/30 6/14 6/29 7/14 7/29
Date
Dis
char
ge (
CF
S)
13 Year Avg. (1993-2006)20042005
Chinook Salmon Pre-smolts and Smolts PIT-tagged at Lemhi Screwtrap in Fall 2003, and Spring 2004.
0
20
40
60
80
100
120
140
160
180
8/1/
2003
8/15
/200
3
8/29
/200
3
9/12
/200
3
9/26
/200
3
10/1
0/20
03
10/2
4/20
03
11/7
/200
3
11/2
1/20
03
12/5
/200
3
12/1
9/20
03
1/2/
2004
1/16
/200
4
1/30
/200
4
2/13
/200
4
2/27
/200
4
3/12
/200
4
3/26
/200
4
4/9/
2004
4/23
/200
4
5/7/
2004
5/21
/200
4
6/4/
2004
6/18
/200
4
7/2/
2004
7/16
/200
4
7/30
/200
4
Date
# o
f C
hin
oo
k
Chinook
3,566 pre-smolts
622 smolts
Lemhi Conservation PlanLemhi Conservation Plan
• Since 2000, Habitat Conservation Measures;
At L-06 35 cfs will be maintained not less than 80% of the
time from April 15 to June 30, And 25 cfs will be maintained not more than 20%
of the time from April 15 to June 30.One of the most contentious issues between NOAA
and Irrigators.
Spring Flow Crisis 2004-5 –Spring Flow Crisis 2004-5 –Extraordinary CircumstancesExtraordinary Circumstances
Litigation nightmare:• By Idaho Water Law, water master must deliver
water by priority dates. • De-watering river = ESA take.• Everyone’s nervous: Irrigator’s, OSC, IDFG,
NOAA fisheries, USFWS. • Third-party lawsuits.
ISS Screw TrapISS Screw Trap
• Capture and PIT tag out-migrating juvenile chinook salmon.
• Estimate the population of juvenile salmon in the Lemhi River.
• Calculate Travel Time to the Ocean.
• Calculate Survival to the Ocean.
• Calculate Survival Rates of Returning Adults.
Entire mainstem screened.78 fish screens.
35 fish screens above trap.43 fish screens below trap.
5 fish screens below L-06
L-03 DiversionL-03 Diversion
L-03 Fish ScreenL-03 Fish Screen
Design flow 34.0 cfs
ObjectivesObjectives
• Document the relationship between smolt entrainment and flows in critical reaches of the Lemhi River.
• Document the utilization of fish screen bypasses by Chinook salmon pre-smolts and smolts.
Mean Daily Lemhi River Flows at L-05 and PIT-tagged Chinook salmon smolts at Lemhi Screwtrap and interrogated PIT-tags
at L-03 Fish Screen, Spring 2004
0
50
100
150
200
250
300
3/1/
2004
3/8/
2004
3/15
/200
4
3/22
/200
4
3/29
/200
4
4/5/
2004
4/12
/200
4
4/19
/200
4
4/26
/200
4
5/3/
2004
5/10
/200
4
5/17
/200
4
5/24
/200
4
5/31
/200
4
6/7/
2004
6/14
/200
4
6/21
/200
4
6/28
/200
4
7/5/
2004
7/12
/200
4
7/19
/200
4
7/26
/200
4
Date
CF
S
0
5
10
15
20
25
30
35
40
45
50
# P
IT-t
ags
Trap PIT-tags
L-03 PIT-tags
2004 Flow
Spring Chinook Salmon Smolts Interrogated at L-03 Fish Screen, 2003.
0
5
10
15
20
25
30
4/1/
2003
4/6/
2003
4/11
/200
3
4/16
/200
3
4/21
/200
3
4/26
/200
3
5/1/
2003
5/6/
2003
5/11
/200
3
5/16
/200
3
5/21
/200
3
5/26
/200
3
5/31
/200
3
Date
# P
IT T
ags
Ob
serv
ed
0
50
100
150
200
250
300
350
400
450
Disch
arge at L
-05 (CF
S)
No. Tagged Chinook Bypassed Discharge
Interrogated = Interrogated = 4%4%
Spring Chinook Salmon Smolts Interrogated at L-03 Fish Screen, 2004.
0
5
10
15
20
25
30
4/1/
2004
4/6/
2004
4/11
/200
4
4/16
/200
4
4/21
/200
4
4/26
/200
4
5/1/
2004
5/6/
2004
5/11
/200
4
5/16
/200
4
5/21
/200
4
5/26
/200
4
5/31
/200
4
Date
# P
IT T
ags
Ob
serv
ed
0
50
100
150
200
250
300
350
400
450
Disch
arge at L
05 (CF
S)
No. Tagged Chinook Bypassed Discharge
Interrogated = Interrogated = 27%27%
Spring Chinook Salmon Smolts Interrogated at L-03 Fish Screen, 2005.
0
5
10
15
20
25
30
4/1/
2005
4/6/
2005
4/11
/200
5
4/16
/200
5
4/21
/200
5
4/26
/200
5
5/1/
2005
5/6/
2005
5/11
/200
5
5/16
/200
5
5/21
/200
5
5/26
/200
5
5/31
/200
5
Date
# P
IT T
ags
Ob
serv
ed
0
50
100
150
200
250
300
350
400
450
Disch
arge at L
-05 (CF
S)
No. Tagged Chinook Bypassed Discharge
Interrogated = Interrogated = 26%26%
Spring Chinook Salmon Smolts Interrogated at L-03 Fish Screen, 2006.
0
5
10
15
20
25
30
4/1/
06
4/6/
06
4/11
/06
4/16
/06
4/21
/06
4/26
/06
5/1/
06
5/6/
06
5/11
/06
5/16
/06
5/21
/06
5/26
/06
5/31
/06
Date
# P
IT T
ags
Ob
serv
ed
0
50
100
150
200
250
300
350
400
450
Disch
arge at L
-05(CF
S)
No. Tagged Chinook Bypassed Discharge (CFS)
Interrogated = Interrogated = 9%9%
L-03 PIT-tag InterrogationsL-03 PIT-tag Interrogations
• In low run-off years, > than 25% of spring Chinook smolts were entrained at L-03.
• 28% of interrogated smolts were interrogated at 2 PIT-tag readers, 5% at 3 readers.
• In 2004, 50% (311) of all PIT-tagged smolts (622) were observed at LGD.
• In 2004, 64% (118) of L-03 interrogated smolts were observed at LGD.