Mitigation for the Construction and Operation of Libby Dam

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project initiation. We did not monitor fish abundance within the Grave Creek Phase I Restoration Project area. However, we did monitor the benthic macroinvertebrate community within the project area, but none of the seven metrics selected a priori differed significantly approximately 1 year after the project was completed. Although we expected the macroinvertebrates to respond relatively quickly to the changes in the physical environment, our monitoring in Grave and Libby creeks either did not change or shifted in a direction that was more consistent with a disturbed environment. We attribute these changes to the disturbance activities and abundance of fine sediment within the project areas that was present from construction in the fall to the spring freshet. We believe that the first year following the initial construction period is the period of time that channel stability is most vulnerable. Much of the bed material can potentially become mobile until the pavement layer establishes following the initial bankfull discharge in the stream after project construction (D. Rosgen, personal communication). We will continue to monitor macroinvertebrates at both the Grave and Libby creek project to determine if these trends reverse as channel disturbances recover over time. Although we did monitor fish abundance within the Libby Creek project area, we did not expect to be able to detect a response from the fish community within the first year after project construction due to the longer lifecycle of fish compared to macroinvertebrates. We will continue to annually monitor the fish community at this site in order to assess the long-term response to the restoration activities. 145
References Chisholm, I.M., M.E. Hensler, B. Hansen, D. Skaar. 1989. Quantification of Libby Reservoir levels needed to maintain or enhance reservoir fisheries. Methods and Data Summary 1983- 1987. Prepared for Bonneville Power Administration by Montana Department of Fish, Wildlife and Parks. Kalispell, Montana. Daley, R.J., E.C. Carmack, C.B. Gray, C.H. Pharo, S. Jasper, and R.C. Wiegland. 1981. The effects of upstream impoundments of Kootenay Lake, British Columbia, Canada Inland Waters Directorate, Research Institute, Scientific Series, British Columbia, Canada. Dunnigan, J.L, B. Marotz, J. DeShazer, L. Garrow, and T. Ostrowski. 2002. Mitigation for the construction and operation of Libby Dam: Annual report 2001-2002. Bonneville Power Administration. Portland, Oregon. Project Number 199500400. Graham, P.J. 1979. Aquatic environmental analysis of Kootenai Falls. Montana Department of Fish and Game prepared for Department of Natural Resources. Hauer, R., J. Stanford. 1997. Kootenai river zoobenthos investigation: Kootenai River Fisheries Investigations - Montana. Montana Department of Fish, Wildlife and Parks, Region 1. Annual Report to Bonneville Power Administration, Contract , Project 83-467 Jenkins, R.M. 1967. The influence of some environmental factors on standing crop and harvest of fishes in U.S. reservoirs. Pages 298-321 in Reservoir fishery resources symposium. Southern Division American Fisheries Society, Bethesda MD, U.S.A. KTOI and MFWP. 2004. Draft Kootenai Subbasin Plan. Available on CD from the Kootenai Tribe of Idaho, Bonners Ferry, ID and Montana Fish, Wildlife & Parks, Kalispell. Also available at: http://www.nwcouncil.org/fw/subbasinplanning/kootenai/plan/ Marotz, B.L., D. Gustafson, C. Althen and B. Lonen. 1996. Model development to establish integrated operational rule curves for Hungry Horse and Libby Reservoirs - Montana. Montana Department of Fish, Wildlife and Parks - Region 1. Prepared for U.S. Department of Energy - BPA. Project number 83-467 Marotz, B.L., S.R. Dalbey, C. Muhlfeld, S. Snelson, G. Hoffman, J. DosSantos and S. Ireland. 1998. Fisheries mitigation and implementation plan for losses attributable to the construction and operation of Libby Dam. Montana Fish, Wildlife and Parks, Kalispell, MT., Confederated Salish and Kootenai Tribes, Pablo, Montana, and Kootenai Tribe of Idaho, Bonners Ferry, Idaho. May B. and Joe Huston 1983. Kootenai river investigations final report: Fisheries investigations. Montana Department of Fish, Wildlife and Parks in cooperation with U.S. Army Corps of Engineers. 146
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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
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Libby Creek Section 1 of Libby Cree
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Figure 28. Rainbow trout, brook tro
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Pipe Creek Juvenile rainbow trout w
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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 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: Discussion The Grave Creek Phase I
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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