Mitigation for the Construction and Operation of Libby Dam

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Table 5. Mean bankfull width, depth, width to depth ratio, cross sectional area, and maximum depth for 6 permanent cross sectional surveys in 1999, 2002 and 2003. Variance estimates for annual mean values are presented in parentheses. A repeated measures analysis of variance (RPANOVA) was preformed for each parameter, and the P value is presented for each RPANOVA. The results of subsequent multiple comparisons are also presented. 1999 (Pre Mean Bankfull Width (ft) Mean Bankfull Depth (ft) Width to Depth Ratio Cross Sectional Area (Square ft.) Maximum Bankfull Depth (ft) 110.7 (1135.1) 1.26 (0.1) 96.1 (2461.2) 136 (1322) 2.85 (0.8) Restoration) 2002 (As Built) 53.7 (51.5) 2.06 (0.2) 27.0 (39.8) 114.7 (885.5) 4.67 (2.5) 2003 51.8 (21.0) 2.32 (0.05) 22.5 (8.3) 125 (342.4) 4.73 (1.7) RPANOVA and P < 0.00001 P < 0.00001 P = 0.001 P = 0.166 Multiple 1999/2002 P = 0.005 1999/2002 P = 0.01 1999/2002 P = 0.016 1999/2002 P = 0.127 Comparison 1999/2003 P = 0.006 1999/2003 P = 0.001 1999/2003 P = 0.014 1999/2003 P = 0.430 Results 2002/2003 P = 0.36 2002/2003 P = 0.093 2002/2003 P = 0.08 2002/2003 P = 0.127 P = 0.003 1999/2002 P = 0.028 1999/2003 P = 0.007 2002/2003 P = 0.799 Table 6. Mean bankfull width, maximum bankfull depth, and length measured from 27 pools in 2002 and 2003. Variance estimates for annual mean values are presented in parentheses. A statistical comparison of annual mean values was not performed because the 27 pools represented all pools within the project area, and therefore represents a complete census. The percent change for each parameter from 2002 to 2003 is also presented. Mean Bankfull Width (ft) Maximum Bankfull Depth (ft) Mean Length (ft.) Total Length (ft.) 2002 (As Built) 49.5 (18.3) 6.5 (1.1) 64.7 (359.0) 1748.0 2003 53.8 (45.9) 5.6 (1.9) 75.2 (815.4) 2031.2 Percent Change 8.6% -14.8% 16.2% 16.2% 137
190.0 185.0 180.0 175.0 170.0 165.0 Elevation 160.0 155.0 150.0 145.0 140.0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 Station 2002 2003 2001 Figure 7. The longitudinal profile for the Grave Creek Phase I Restoration Project. The survey was completed before (2001) and after (2002; as built) project completion and after the first spring freshet (2003). The station (longitudinal location measured at the channel thalweg) begins at the upstream boundary of the project. 138
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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
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Results Bull Trout Redd Counts Grav
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Table 1. Bull trout redd survey sum
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Quartz Creek Bull trout redd counts
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Bull Trout Redds 40 35 30 25 20 15
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Keeler Creek Bull trout that spawn
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Burbot Monitoring Below Libby Dam T
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Table 2. Summary information for th
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7000 6000 5000 Y = 45.246e 0.0055x
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The Libby FWP Mitigation Staff surg
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Table 2. (Continued) Capture locati
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Figure 18. Capture locations for a
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Table 4. T-test results. This table
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Figure 19. Montana Mountain Metrics
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Table 5. T-test results. This table
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Juvenile Salmonid Population Estima
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Grave Creek Juvenile salmonid monit
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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 and 98: Table 9. Average catch per net for
Page 99 and 100: Table 11. Percent composition of ma
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: Table 4. Design specifications for
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
Page 153: Table A13. Yearly mean total zoopla
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Mitigation for the Construction and Operation of Libby Dam

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