WILLISTON RESERVOIR WATERSHED: FISH AND ... - BC Hydro

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1.0 BACKGROUND AND OBJECTIVES BACKGROUND AND OBJECTIVES Williston Reservoir, having a surface area of 1,736 km 2 , is by far the largest body of fresh water in British Columbia (Figure 1). The reservoir reached its full capacity in 1972, following a period of back-flooding by the W.A.C. Bennett Dam (located at the outlet of Williston Reservoir’s Peace Reach). This back-flooding converted, in effect, a huge network of pristine rivers and streams (lotic environments) into a single lake-like system (lentic environment). While the ecological effects of this shift to lentic dominance have not been quantified, it is generally believed that it has resulted in dramatic changes in fish community structure; such that some species seem to have been adversely affected (e.g., Arctic grayling, mountain whitefish and rainbow trout) while others seem to have benefited (e.g., lake whitefish, bull trout and kokanee) (Langston and Blackman 1993). The mechanisms responsible for the apparent changes in fish community structure are not clearly understood, but, in all likelihood, they have both ecological (i.e., changes may reflect species/community adaptability) and sociological (the reservoir may have opened the watershed up to recreational fishers and other industries that affect fish and fish habitat) bases. BC Hydro established the Peace/Williston Fish and Wildlife Compensation Program (PWFWCP) in 1988 to compensate for the environmental and ecological effects of the W.A.C. Bennett and the Peace Canyon (20.5 km downstream of the W.A.C. Bennett Dam) dams. The PWFWCP Fish Technical Committee and Program Staff are, at this time, developing a Strategic Plan that will chart the direction of the fish component of the Program for the next five years. The Fish Technical Committee has decided to review existing Williston Watershed files and reports for relevant fish data and for data that may be functionally pertinent to the watershed’s fish communities (e.g., water quality, benthos, physical habitat and pollution) prior to developing the Strategic Plan, so that the Plan can be developed in view of “what is already known” and “what has been accomplished to date”. The primary objectives of this project are: (1) to identify fish-related work that has been done in the Williston Reservoir Watershed to date (1959 to 1998) (Phase 1 work); and (2) to review the basic findings, major conclusions and recommendations of all Program-based projects (1988 to 1998) (Phase 2 work). The results of the Phase 1 work are given in this document in a bibliographical format. The results of the Phase 2 work are given in the document: Rae, R., and T.D. French. 1999. Fish and Fish Habitat Projects in the Williston Reservoir Watershed: A Review of Peace/Williston Compensation Program Reports (1988 to 1998). PWFWCP, Report No. 193. 106 pp. While the Phase 1 and 2 reports will help Program designates develop the Strategic Plan of the next five years (the overall project objective), their use is limited in that the text-based format does not permit users to conduct data queries or specific data extractions. Having said this, these reports do provide a complete listing of data sources that may be used to develop a searchable database. 1
W 1 N S E Key To Major Basins.......N.T.S. Mapsheets 2 8 1. Finlay River.......94-C, 94-D, 94-E, 94-F 2. Ingenika River.......94-C, 94-D, 94-E, 94-F 3. Ospika River.......94-B, 94-C, 94-F, 94-G 4. Williston Reservoir Residual.......93-N, 93-O, 94-B, 94-C 5. Mesilinka River.......94-C 6. Peace Reach.......93-O, 93-P, 94-A, 94-B 7. Osilinka River.......93-N, 94-C 8. Omineca River.......93-M, 93-N, 94-C, 94-D 9. Manson River.......93-N, 93-O 10. Nation River.......93-N, 93-O 11. Parsnip River.......93-I, 93-J, 93-O 12. Crooked-Pack Rivers.......93-J, 93-O 13. Dinosaur Reservoir Basin.......93-O 1 7 5 4 1 10 BACKGROUND AND OBJECTIVES Williston Reservoir, British Columbia 1:2450000 Figure 1. Major drainage boundaries (dashed lines) of Williston Reservoir Watershed. Basin boundaries delineated from 1:250,000 Energy, Mines and Resources contour maps (500-ft.contours). Basins named after largest mainstem(s) (shown in bold). 4 4 9 4 4 3 4 4 4 12 6 11 13 2
Page 1 and 2: WILLISTON RESERVOIR WATERSHED: FISH
Page 3 and 4: ACKNOWLEDGEMENTS I thank Bob Westco
Page 5 and 6: TABLE OF CONTENTS Page No. 1.0 BACK
Page 7 and 8: TABLE OF CONTENTS (CONT.) Page No.
Page 9 and 10: TABLE OF CONTENTS (CONT.) Page No.
Page 11: LIST OF TABLES Page No. TABLE 1 INT
Page 15 and 16: 2.2.2 CD-ROM Databases METHODS Two
Page 17 and 18: 2.3 ACRONYMS AND ABBREVIATIONS METH
Page 19 and 20: 2.5 REPORT ORGANIZATION 2.5.1 Sub-B
Page 21 and 22: 2.5.2 Subject Categorization METHOD
Page 23 and 24: 4.0 RESULTS OVERVIEW 4.1 LIST OF PU
Page 25 and 26: Planning (15) Planning (15) Plannin
Page 27 and 28: PART A. FINLAY RIVER SUB-BASIN FINL
Page 29 and 30: 5.2 INVENTORY PROJECTS FINLAY RIVER
Page 31 and 32: 5.3 PLANNING REPORTS FINLAY RIVER S
Page 33 and 34: FINLAY RIVER SUB-BASIN (12) Norecol
Page 35 and 36: PART B. INGENIKA RIVER SUB-BASIN IN
Page 37 and 38: 6.2 INVENTORY PROJECTS INGENIKA RIV
Page 39 and 40: INGENIKA RIVER SUB-BASIN 6.9 PROVIN
Page 41 and 42: 7.1 LIST OF NAMED LAKES AND STREAMS
Page 43 and 44: OSPIKA RIVER SUB-BASIN Reservoir Wa
Page 45 and 46: 8.1 LIST OF NAMED LAKES AND STREAMS
Page 47 and 48: WILLISTON RESERVOIR RESIDUAL (18) J
Page 49 and 50: WILLISTON RESERVOIR RESIDUAL (10) L
Page 51 and 52: WILLISTON RESERVOIR RESIDUAL Inc. a
Page 53 and 54: PART E. MESILINKA RIVER SUB-BASIN M
Page 55 and 56: 9.2 INVENTORY PROJECTS MESILINKA RI
Page 57 and 58: MESILINKA RIVER SUB-BASIN (9) Langs
Page 59 and 60: PART F. PEACE REACH PEACE REACH SUB
Page 61 and 62: 10.2 INVENTORY PROJECTS PEACE REACH
Page 63 and 64:
PEACE REACH SUB-BASIN (31) Zemlak,
Page 65 and 66:
10.8 FEDERAL FLOW GAUGING STATIONS
Page 67 and 68:
11.1 LIST OF NAMED LAKES AND STREAM
Page 69 and 70:
OSILINKA RIVER SUB-BASIN (4) Blackm
Page 71 and 72:
PART H. OMINECA RIVER SUB-BASIN OMI
Page 73 and 74:
12.2 INVENTORY PROJECTS OMINECA RIV
Page 75 and 76:
OMINECA RIVER SUB-BASIN 12.6 ENVIRO
Page 77 and 78:
Page 79 and 80:
MANSON RIVER SUB-BASIN (5) Blackman
Page 81 and 82:
PART J. NATION RIVER SUB-BASIN NATI
Page 83 and 84:
14.2 INVENTORY PROJECTS NATION RIVE
Page 85 and 86:
NATION RIVER SUB-BASIN (38) Langsto
Page 87 and 88:
NATION RIVER SUB-BASIN (16) Wood, M
Page 89 and 90:
14.10 PROVINCIAL EMS SITES (WATER C
Page 91 and 92:
Page 93 and 94:
PARSNIP RIVER SUB-BASIN (22) Mathia
Page 95 and 96:
15.4 ENHANCEMENT PROJECTS PARSNIP R
Page 97 and 98:
CROOKED-PACK RIVERS SUB-BASIN PART
Page 99 and 100:
16.2 INVENTORY PROJECTS CROOKED-PAC
Page 101 and 102:
CROOKED-PACK RIVERS SUB-BASIN (39)
Page 103 and 104:
CROOKED-PACK RIVERS SUB-BASIN (14)
Page 105 and 106:
DINOSAUR RESERVOIR SUB-BASIN PART M
Page 107 and 108:
17.2 INVENTORY PROJECTS DINOSAUR RE
Page 109 and 110:
DINOSAUR RESERVOIR SUB-BASIN (4) BC
Page 111 and 112:
APPENDIX A (Projects done outside o
Page 113:
A.3 ENHANCEMENT PROJECTS APPENDIX A
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WILLISTON RESERVOIR WATERSHED: FISH AND ... - BC Hydro

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