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Libby Mitigation Annual Report 2000

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Libby Mitigation Annual Report 2000 MITIGATION FOR THE CONSTRUCTION AND OPERATION OF LIBBY DAM ANNUAL REPORT 2000 By: Greg Hoffman, Brian Marotz, Jay DeShazer, Larry Garrow, Tom Ostrowski and James Dunnigan Montana Fish, Wildlife and Parks 475 Fish Hatchery Road Libby, MT 59923 Funded by: Bonneville Power Administration Division of Fish and Wildlife P.O. Box 3621 Portland, OR 97208 Ron Morinaka, COTR Project Number 199500400 Agreement DE-AI79-83-BP12660 September, 2002 EXECUTIVE SUMMARY “Mitigation for the Construction and Operation of Libby Dam” is part of the Northwest Power Planning Council’s resident fish and wildlife program. The program was mandated by the Northwest Planning Act of 1980, and is responsible for mitigating for damages to fish and wildlife caused by hydroelectric development in the Columbia River Basin. The objective of Phase I of the project (1983 through 1987) was to maintain or enhance the Libby Reservoir fishery by quantifying seasonal water levels and developing ecologically sound operational guidelines. The objective of Phase II of the project (1988 through 1996) was to determine the biological effects of reservoir operations combined with biotic changes associated with an aging reservoir. The objectives of Phase III of the project (1996 through present) are to implement habitat enhancement measures to mitigate for dam effects, to provide data for implementation of operational strategies that benefit resident fish, monitor reservoir and river conditions, and monitor mitigation projects for effectiveness. 2 ACKNOWLEDGEMENTS We are thankful to the many people that substantially contributed to this project. Neil Benson, Monty Benner, Will Young, and Kimber Hrach helped with field data collection, data entry and proofing, and lab processing. Brian Marotz was the project leader of this project and provided thoughtful review of this report. Hatchery staff from Washoe Park State Fish Hatchery in Anaconda, Montana provided westslope cutthroat trout eggs for the remote site incubator studies in Young Creek, which made that research possible. Many of the aquatic habitat restoration projects that were accomplishments and summarized in this report were cooperative efforts between Montana Fish, Wildlife and Parks and other agencies and organizations. The Glen Lake Irrigation Diversion Project was accomplished by funding from several cooperating entities including the USFWS “Partners for Wildlife”, Glen Lake Irrigation District, and the USFS. Lincoln County assisted with the design and construction of the Eureka Community Fishing pond, and funding and implementation of the Parmenter Creek restoration project. The City of Troy contributed to the Troy Water Works Project and the Troy Community fishing pond. This work was funded by the Bonneville Power Administration, and was administered by Ron Morinaka. 3 TABLE OF CONTENTS EXECUTIVE SUMMARY .............................................................................................................2 ACKNOWLEDGEMENTS.............................................................................................................3 LIST OF FIGURES .........................................................................................................................7 LIST OF TABLES...........................................................................................................................9 INTRODUCTION .........................................................................................................................11 PROJECT HISTORY ....................................................................................................................13 ASSOCIATIONS...........................................................................................................................14 PROJECT PERSONNEL...............................................................................................................16 DESCRIPTION OF STUDY AREA .............................................................................................22 Subbasin Location..............................................................................................................22 Drainage Area ....................................................................................................................22 Climate...............................................................................................................................22 Topography........................................................................................................................22 Geology..............................................................................................................................23 Hydrology ..........................................................................................................................24 Soils ...................................................................................................................................24 Land Use ............................................................................................................................25 Fish Species .......................................................................................................................26 Reservoir Operation...........................................................................................................27 Bull Trout Habitat..............................................................................................................29 White Sturgeon Habitat .....................................................................................................30 Burbot Habitat....................................................................................................................32 Westslope Cutthroat Trout and Interior Redband Trout Habitat .......................................33 Kokanee Habitat ................................................................................................................33 BULL TROUT REDD COUNTS..................................................................................................35 Methods .............................................................................................................................35 Results and Discussion ......................................................................................................35 BULL TROUT RADIO TELEMETRY ........................................................................................44 4 BURBOT .......................................................................................................................................48 KOOTENAI RIVER TEMPERATURE MONITORING .............................................................52 STREAM MACROINVERTEBRATE MONITORING...............................................................58 RESERVOIR ZOOPLANKTON MONITORING........................................................................60 Collection Methods............................................................................................................60 Results and Discussion ......................................................................................................61 KOOCANUSA RESERVOIR FISH ABUNDANCE....................................................................65 Methods .............................................................................................................................65 Results and Discussion ......................................................................................................68 UPPER BASIN HABITAT IMPROVEMENT PROJECTS and MONITORING........................76 Glen Lake Irrigation Diversion Project .............................................................................76 Grave Creek .......................................................................................................................79 Sinclair Creek ....................................................................................................................80 Sinclair Population Estimates ............................................................................................82 Results....................................................................................................................83 Therriault Creek.................................................................................................................88 Therriault Creek Population Estimates..............................................................................88 Results....................................................................................................................89 Young Creek ......................................................................................................................95 Introduction............................................................................................................95 Number Fish...........................................................................................................96 Remote Site Incubators..........................................................................................97 Young Creek Fish Trap..........................................................................................99 Young Creek Population Estimates .....................................................................105 Results..................................................................................................................105 LINCOLN COUNTY FAIRGROUNDS POND .........................................................................111
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