GMSMON-17 WILLISTON RESERVOIR TRIBUTARY - BC Hydro

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May 22, 2012 Report No. 1114920016-R-Rev0-2000 16 GMSMON-17 WILLISTON RESERVOIR TRIBUTARY HABITAT REVIEW Whitefish, Bull Trout, and Prickly Sculpin (Cottus asper). The low numbers of fish caught, especially for target species, did not permit estimation of abundance based on the depletion between electrofishing passes using the proposed analysis. Similarly, the low numbers of fish did not warrant detailed analyses of life-history characteristics (e.g., length-weight relationships). The numbers of fish caught in each electrofishing pass and the lengths and weights of all fish caught by electrofishing pass, habitat type, and sampling site are provided in Table 3, Appendix D. 3.2.2.1 Six Mile Creek Three sites were sampled on Six Mile Creek. In total, 2 Prickly Sculpin and 1 Mountain Whitefish were caught. Four Rainbow Trout and one unidentified fish were also observed. The sites consisted mostly of swift and shallow riffle habitats. 3.2.2.2 Lamonti Creek Three sites were sampled on Lamonti Creek. In total, 4 Rainbow Trout, 2 Mountain Whitefish, and 1 Prickly Sculpin were caught. In addition, 1 Rainbow Trout and 2 sculpin sp. were observed but not caught. Habitat was mostly riffles with some pools associated with large woody debris and log jams. 3.2.2.3 Factor Ross Creek Two sites were sampled on Factor Ross Creek. In total, 10 Mountain Whitefish and 1 sculpin sp. were caught. In addition, 5 Mountain Whitefish and 2 sculpin sp. were observed but not caught. 3.2.2.4 Ole Creek Two sites were sampled on Ole Creek. In total, 5 Mountain Whitefish and 3 Bull Trout were caught. Three Mountain Whitefish, 1 sculpin sp. and 1 trout sp. were observed but not caught. In addition, 3 large (300 to 400 mm) Bull Trout were observed approximately 5 m upstream of the upstream end of one of the sites (OLE1), holding in the current near the bank. One of the Bull Trout was captured by dip net and appeared to be in good condition. It is assumed that these fish were moving downstream and encountered the fence. A summary of fish caught and observed along with the catch-per-unit-effort (CPUE) while electrofishing at each tributary is presented below in Table 7 (removal and depletion data cards found in Appendix E and copies of site cards are found in Appendix F).
May 22, 2012 Report No. 1114920016-R-Rev0-2000 17 GMSMON-17 WILLISTON RESERVOIR TRIBUTARY HABITAT REVIEW Table 7: Summary of fish caught and observed, and CPUE during electrofishing surveys in Williston Reservoir tributary enhancement study creeks. Creek Species # Caught # Observed Total Length of all sites combined (m) CPUE (fish/km) Ole Bull Trout 3 3* 6 206 29 Ole Mountain Whitefish 5 3 8 206 39 Ole Sculpin sp. 0 1 1 206 5 Ole Trout sp. 0 1 1 206 5 Factor Ross Mountain Whitefish 10 5 15 225 67 Factor Ross Sculpin sp. 1 2 3 225 13 Lamonti Mountain Whitefish 2 0 2 331 6 Lamonti Rainbow Trout 4 1 5 331 15 Lamonti Sculpin sp. 1 2 3 331 9 Six Mile Mountain Whitefish 1 0 1 300 3 Six Mile Rainbow Trout 0 4 4 300 13 Six Mile Prickly Sculpin 2 0 2 300 7 *Three large (300 to 400 mm) Bull Trout observed ~5 m upstream of upstream block net after an electrofishing pass. 3.3 Amphibian Surveys Amphibian surveys were completed during all three visits to the tributaries in May, June, and August 2011. Total effort and area sampled at each tributary is summarized in Table 8. Data are summarized in Appendix D. Table 8: Amphibian Survey Time and Area Effort over May, June, and August 2011. Site Area (m²) Time (min) Six Mile Creek 7700 395 Lamonti Creek 3200 210 Factor Ross Creek 3800 200 Ole Creek 1300 150 3.3.1 First site visit (9 to 18 May, 2011) Amphibian activity was relatively limited during this first field session, especially at Six Mile and Lamonti creeks, the southern tributaries. Time-constrained surveys of key wetland habitat surrounding all four tributaries were completed during this first field session. The only observed amphibian presence at the southern sites was found in a small wetland adjacent to Six Mile Creek. A Long-Toed Salamander egg mass was located approximately 3 cm deep attached to a stump root; the wetland water temperature was 12º C (air temperature ~ 6º C). As the weather improved for work at Ole and Factor Ross creeks (northern tributaries), and air temperatures increased (up to 27º C on 16 May, 2011) amphibian activity also appeared to increase. An adult Western Toad was spotted emerging from a root-wad on a fallen tree along Factor Ross Creek. Ole Creek also had many juvenile Western toads in the shrubby wetland area at the mouth where the creek flows out into the Williston Reservoir. On the
Page 1 and 2: Peace Project Water Use Plan Willis
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Location Site Date Ole I3 Adult Wes
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Common Name APPENDIX D Data Summary
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Common Name Purple Finch Red-Breast
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APPENDIX D Data Summary from 2011 S
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APPENDIX F Fish Site Cards May 22,
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APPENDIX H Vegetation Survey Forms
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# File: WillstonTribsvs2.R APPENDIX
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GMSMON-17 WILLISTON RESERVOIR TRIBUTARY - BC Hydro

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