Draft Study Plan Vol 1 (PDF) - Alaska Power and Telephone Company

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DRAFT DOCUMENT July 102 118 1898 August 106 119 1667 September 78.5 77.4 1112 October 32.9 28.9 727 November 8.3 7.6 296 December 4.9 6.4 170 Annual 38.6 40.7 778 (1) USGS Gage 15056280 (Upper Chilkoot Lake outlet near Haines), for Water Years (WY) 1994-97 (2) Average flows for WY 1987-2002 by correlation with USGS Gage 15039900 (Dorothy Lake outlet near Juneau) (3) ADF&G Gage 11901, for WY 2008-10 Surface waters in the Chilkoot River Valley in the form of wetlands are shown in Figure 9. This wetland delineation is from the USF&WS website. Further wetland delineation will be necessary for more complete information. Beaver dams have had a significant influence in the creation of wetlands above the ‘Glory Hole’ above Chilkoot Lake. Figure 9: Chilkoot River Valley Wetlands 6 6 Wetlands map courtesy of USF&WS Website: Wetland Mapper.
DRAFT DOCUMENT In addition to stream gaging, GLH installed a water temperature datalogger between Hydro and Power creeks in September 2011. Water temperatures were also periodically recorded in the mid-90s when this site was previously considered for hydropower development. Water quality sampling also began in September 2011 with a second quarterly sample taken in February 2012. Impacts to Affected Waters The waters affected or potentially affected by the Project are Connelly Lake and its outlet stream, the lower part of the Upper Chilkoot River (3.5-4.0 miles), and Chilkoot Lake. Water from Connelly Lake will be diverted through a penstock or power tunnel to the powerhouse, run through a turbine and discharged into the Chilkoot River; wetlands along the lake outlet stream on a bench midway between the lake and river (approximate El. 1425), could be impacted by reduced spill from the lake and/or placing a penstock saddle in it. Until water temperature data is collected and comparisons can be made between river temps and Connelly Lake outflow temps, affects by the Project on river water temperatures at different times of the year below the point of discharge will not be known. However, based on the above gage data this project could make a considerable contribution to the river flow during the winter months compared to the average monthly flow and therefore water temperature will be an important factor. Project construction and operation may redirect some surface flows above Chilkoot Lake where beaver ponds have flooded large areas, including the access road corridor. The Project also has the potential to contribute sediment to these waters. A more site specific wetlands delineation will be conducted in the summer of 2012, as described below in the study plan. Water temperatures will be recorded for 1 year and water quality samples will be collected for a total of one year (two quarters already completed). Fisheries Resources The Chilkoot River is listed as Anadromous Stream No. 115-33-10200 and is known to have Chum, Coho, Pink, Sockeye, Cutthroat Trout, Dolly Varden, and Eulachon. Only Coho, Sockeye, Pinks, Chum, and Dolly Varden are listed as being above Chilkoot Lake. Only Coho, Sockeye, Dolly Varden and Cutthroat Trout are listed as using Chilkoot Lake. All other species come up the lower Chilkoot River, but do not enter the lake. Coho, Sockeye, and Dolly Varden go beyond the Chilkoot River and Connelly Creek (Connelly Lake outlet stream) confluence. Salmon from the Chilkoot River system are harvested by commercial fishermen, sports fishermen, and for subsistence. All three methods of take are an important part of the areas economy and lifestyle. As described previously, the Chilkoot River has significant salmon runs. This project when previously considered by Haines Power and Light Company, Inc. in the 1990’s contracted with the Alaska Department of Fish & Game to completed a fishery survey of the upper Chilkoot Valley during the summer and fall of 1995 in anticipation of licensing and developing the Connelly Lake Hydro project. A report was completed entitled “Fish and fish habitat surveys conducted in the upper Chilkoot Valley near Draft Study Plan – June 2012 p. 17 Connelly Lake Hydroelectric Project
Page 1 and 2: June 6, 2012 To All Agencies and Ot
Page 3 and 4: All Agencies and Other Interested P
Page 5 and 6: DRAFT DOCUMENT CONNELLY LAKE HYDROE
Page 7 and 8: DRAFT DOCUMENT Figure 12: New bridg
Page 9 and 10: DRAFT DOCUMENT CONNELLY LAKE HYDROE
Page 11 and 12: DRAFT DOCUMENT Figure 2: Project Al
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Page 21 and 22: DRAFT DOCUMENT Chilkoot River Valle
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Page 31 and 32: DRAFT DOCUMENT locations are summar
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Page 35 and 36: DRAFT DOCUMENT Impacts to Avian Spe
Page 37 and 38: DRAFT DOCUMENT The USF&WS, 18 help
Page 39 and 40: DRAFT DOCUMENT As seen in Figures 1
Page 41 and 42: DRAFT DOCUMENT The Steller sea lion
Page 43 and 44: DRAFT DOCUMENT Land Use The Project
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Page 49 and 50: DRAFT DOCUMENT review potential pro
Page 51 and 52: DRAFT DOCUMENT These studies will i
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Page 55 and 56: DRAFT DOCUMENT 7. Wildlife Habitat
Page 57: APPENDIX A 11 x 17 PROJECT DIAGRAMS
Page 64: MONTHLY FLOW DURATION CURVES (PRELI
Page 73 and 74: Connelly Lake Hydro Fisheries Repor
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LIST OF TABLES Table 1. Comparison
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B Powerhouse A Chilkoot Lake C Powe
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Figure 2. Project vicinity, feature
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The area within the Chilkoot River
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Dolly Varden was 3 fish, but ranged
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Connelly Lake Chilkoot River Figure
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Connelly Lake Chilkoot River Figure
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The mainstem of the Chilkoot river
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However, we did not catch Coho Salm
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APPENDIX I FIELD SURVEY PHOTOGRAPHS
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Juvenile Dolly Varden captured in R
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Beaver pond complex Site of helipad
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Beaver pond complex Downstream view
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Reeves Creek Lower end of Reeves Cr
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Power Creek Mouth of Power Creek Le
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New Chilkoot River side slough Upst
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New Chilkoot River side slough View
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Helipads Helipad #1 on road north o
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Helipads Helipad #3 on west bank of
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Appendix II Fisheries data for the
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148 59.38892995 ‐135.6527002 78 3
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APPENDIX D 2012 SEISMIC REFRACTION
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geophones will be those that have r
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8410 154 th Avenue NE Redmond, Wash
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Alaska Power & Telephone | April 18
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Notes 1. The locations of all featu
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APPENDIX F WATER QUALITY SAMPLING R
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Case Narrative Analytica Alaska Inc
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Workorder (SDG): Project: Client: D
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APPENDIX G STREAM GAGING CONNELLY L
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APPENDIX H CONNELLY LAKE, OUTLET ST
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The main (glacial) inlet stream to
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Trap catches in the lower section o
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Outlet to Glory Hole, looking upstr
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Culvert crossing at the tributary t
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Slough below stream #12. 28
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View of Bear Creek looking downstre
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Stream above stream # 13 flowing ac
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Draft Study Plan Vol 1 (PDF) - Alaska Power and Telephone Company

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