Mitigation for the Construction and Operation of Libby Dam

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Table 10. Average catch per net for 12 different fish species* captured in sinking gillnets set during spring in the Rexford area of Libby Reservoir, 1990 through 2003. YEAR 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Surface Temperature 11.7 9.8 16.7 14.4 13.3 13.5 8.9 Date 5/10 5/16 5/5 5/17 5/16 5/8 5/12 5/12 5/11 5/17 5/14 5/15 5/13 5/13 Number of Sinking Nets 27 28 28 28 28 28 28 28 27 28 14 14 14 14 Reservoir Elevation 2358 2330 2333 2352 2405 2386 2365 2350 2417 2352 2371 2392 2384 2417 Average number of fish caught per net for individual fish species RBT 0.1 0.1 0.1 0.3 0.2 0.2 0.7 0.1
Table 11. Percent composition of major fish species* caught in fall floating and spring sinking gillnets in Libby Reservoir, 1988 through 2003. Blank entries in table indicate either no fish were captured or that they occurred in very small proportions. 1988 1989 1990 1991 1992 1993 1994 1995 1996 Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. RB 3.0 0.1 0.7 1.0 0.3 1.8 0.9 4.4 1.4 WCT 0.5 0.3 0.7 1.0 1.7 3.8 0.7 0.8 1.2 HB 1.0 0.3 1.1 0.5 0.7 0.2 0.0 0.3 0.2 ONC 4.5 0.7 0.7 0.4 2.4 0.1 2.4 0.4 2.7 0.1 5.8 0.3 1.7 0.2 5.5 0.4 2.8 1.0 MWF 0.5 1.6 0.2 0.8 0.9 0.2 1.4 0.7 0.7 0.6 1.4 0.2 2.2 0.3 2.1 1.7 1.4 1.5 CRC 39.4 63.8 70.5 66.0 71.4 82.6 50.0 76.5 72.6 81.7 72.8 73.9 54.3 77.0 8.6 62.9 66.5 56.9 NPM 2.9 7.7 4.1 7.4 7.2 4.8 5.8 5.0 5.6 2.9 9.3 5.0 17.5 6.2 19.6 9.3 10.2 8.7 RSS 0.8 0.2 0.2 0.1 0.0 0.0 0.3 0.0 0.0 0.3 0.0 0.0 1.5 0.0 1.3 0.0 0.6 0.0 FSU 0.0 2.3 0.0 1.6 0.0 1.5 0.0 2.6 0.1 2.0 0.0 5.2 0.0 5.3 0.0 3.5 0.0 4.4 CSU 0.0 12.7 0.2 10.3 0.2 4.5 0.3 5.9 0.0 8.8 0.6 9.7 0.6 7.3 0.0 13.9 2.4 18.6 KOK 47.3 1.7 23.4 2.1 15.5 1.5 37.3 1.6 15.7 0.3 4.4 3.4 20.6 0.2% 57.4 2.4 13.2 1.8 YP 5.5 9.4 3.7 5.2 1.2 1.1 0.9 2.9 3.4 BT 2.4 1.4 1.0 1.1 1.7 1.1 2.5 2.8 3.3 1997 1998 1999 2000 2001 2002 2003 Average Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. Fall Spr. RB 1.7 0.2 1.5 0.1 0.6 0.9 1.1 0.2 1.4 0.4 0.4 0.4 2.8 0.9 1.3 0.3 WCT 0.6 0.4 0.5 0.1 0.3 0.2 0.8 0.1 1.7 0 0.1 0 0.8 0.3 0.9 0.1 HB 0 0 2.3 0 0 0 0 0 0 0 0 0 0.4 0.0 0.4 0.0 ONC 2.3 0 4.2 0.4 0.9 1.3 1.9 0.3 3.1 0.4 0.5 0.4 4.0 1.2 2.6 0.4 MWF 2.4 1.9 1.2 2.5 0.6 1.1 0.5 0.7 2.5 0.6 0.3 1.5 2.0 1.6 1.1 1.1 CRC 56.0 33.8 50.2 33.0 44.6 38.3 46.4 66.0 49.3 42.2 41.5 62.4 27.7 54.9 49.6 54.1 NPM 18.0 20.0 21.1 17.6 22.5 20.8 18.1 10.8 22.5 18.6 14.4 11.8 18.6 16.9 12.4 10.5 RSS 3.5 0.2 0.8 1.4 0.7 0.1 0.1 0.4 1.4 0 0.9 0 0.4 0.1 0.8 0.2 FSU 0 7.2 0.3 12.1 0.1 8.7 0.1 4.0 0 1.9 0 3.4 0.4 3.0 0.0 4.0 CSU 3.38 20.8 4.6 24.1 3.3 13.7 4.0 9.1 3.4 24.0 0.6 12.3 1.2 13.3 1.5 12.7 KOK 14.4 2.2 17.3 1.8 27.1 8.1 28.6 0.9 17.5 0.4 41.6 1.2 41.1 1.6 23.9 1.8 YP 0 7.4 0 3.2 0.1 2.8 0.3 1.1 0 2.7 0.1 0.8 5.1 0.1 0.1 3.3 BT 0.1 5.1 0.3 3.3 0.1 2.6 0 5.8 0.3 9.2 0 5.9 0 7.0 0.1 3.3 *Species Codes = RB = Rainbow trout, WCT = westslope cutthroat trout, HB = hybrid rainbow trout X cutthroat trout, ONC= Combined Rainbow, westslope cutthroat and hybrid trout, MWF = mountain whitefish, CRC = Columbia River chub (peamouth), NPM = northern pikeminnow, RSS = red side shiner, FSU = fine scale sucker, CSU = course scale sucker, KOK = kokanee, YP = yellow perch, BT = bull trout. 104
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Mitigation for the Construction and
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MITIGATION FOR THE CONSTRUCTION AND
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depth of burbot that were relocated
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ACKNOWLEDGEMENTS We are thankful to
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Juvenile Salmonid Population Estima
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deviation from reference conditions
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Figure 46. Minimal detectible diffe
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Chapter 2 Tables Table 1. Design sp
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INTRODUCTION Libby Reservoir was cr
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PROJECT HISTORY Montana Fish, Wildl
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2002 - Montana FWP collaborated wit
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DESCRIPTION OF STUDY AREA Subbasin
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Table 1. Current relative abundance
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Similar impacts have been observed
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2460 2440 2420 2400 2380 2360 2340
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construction and operation of Libby
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Chapter 1 Physical and Biological M
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Biological monitoring data was prov
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Figure 1. An aerial photograph of L
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antenna located approximately 5 cm
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We compared samples collected in Se
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extends downstream 131 m. This sect
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and reduced again to 28 ganged floa
Page 47 and 48: Results Bull Trout Redd Counts Grav
Page 49 and 50: Table 1. Bull trout redd survey sum
Page 51 and 52: Quartz Creek Bull trout redd counts
Page 53 and 54: Bull Trout Redds 40 35 30 25 20 15
Page 55 and 56: Keeler Creek Bull trout that spawn
Page 57 and 58: Burbot Monitoring Below Libby Dam T
Page 59 and 60: Table 2. Summary information for th
Page 61 and 62: 7000 6000 5000 Y = 45.246e 0.0055x
Page 63 and 64: The Libby FWP Mitigation Staff surg
Page 65 and 66: Table 2. (Continued) Capture locati
Page 67 and 68: Figure 18. Capture locations for a
Page 69 and 70: Table 4. T-test results. This table
Page 71 and 72: Figure 19. Montana Mountain Metrics
Page 73 and 74: Table 5. T-test results. This table
Page 75 and 76: Juvenile Salmonid Population Estima
Page 77 and 78: Grave Creek Juvenile salmonid monit
Page 79 and 80: Number Fish per 1000 Feet 100 80 60
Page 81 and 82: Libby Creek Section 1 of Libby Cree
Page 83 and 84: Figure 28. Rainbow trout, brook tro
Page 85 and 86: Pipe Creek Juvenile rainbow trout w
Page 87 and 88: Table 6. Average length and weight
Page 89 and 90: Catch per Net A. Mountain Whitefish
Page 91 and 92: Table 8. Kamloops rainbow trout cap
Page 93 and 94: 25000.0 20000.0 15000.0 10000.0 500
Page 95 and 96: Burbot per Trap Day 3 2.5 2 1.5 1 0
Page 97: Table 9. Average catch per net for
Page 101 and 102: deviation = 0.052; Figure 43), with
Page 103 and 104: Table 12. Individual probability va
Page 105 and 106: Discussion Long-term monitoring of
Page 107 and 108: We believe that Libby Reservoir dur
Page 109 and 110: Figure 47. Minimal detectible diffe
Page 111 and 112: References Bahls, L., R. Bukantis,
Page 113 and 114: trout status report (below Kootenai
Page 115 and 116: Chapter 2 Stream Restoration and Mi
Page 117 and 118: food sources, as evidenced by the l
Page 119 and 120: Methods and Results Eureka Pond The
Page 121 and 122: spacing was 172.8 feet, which repre
Page 123 and 124: Figure 2. Vicinity Map for Upper Li
Page 125 and 126: Table 1. Design specifications for
Page 127 and 128: 70 60 50 40 30 20 10 0 500 1000 150
Page 129 and 130: Grave Creek Phase I Restoration Pro
Page 131 and 132: Table 4. Design specifications for
Page 133 and 134: 190.0 185.0 180.0 175.0 170.0 165.0
Page 135 and 136: educed the mean width and width to
Page 137 and 138: Table 7. Mean cross sectional area,
Page 139 and 140: Discussion The Grave Creek Phase I
Page 141 and 142: References Chisholm, I.M., M.E. Hen
Page 143 and 144: Appendix 148
Page 145 and 146: Table A2. Lower Grave Creek Demonst
Page 147 and 148: Table A4. Libby Creek depletion pop
Page 149 and 150:
Table A7. Mean zooplankton densitie
Page 151 and 152:
Table A9. Mean zooplankton densitie
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Table A13. Yearly mean total zoopla
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Mitigation for the Construction and Operation of Libby Dam

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