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Report: Strathcona Dam and Reservoir Elk River Channel Stability and Mitigative Measures
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If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact
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The channel morphology of the lowermost 5 km of the Elk River in Strathcona Park has undergone drastic changes over the last 50 years.
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Author: Kellerhals Engineering Services Ltd.: Kellerhals, R.
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Old Reference Number: CR019
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Old Reference System: FISS
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Date Published: Jan 1992
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Report ID: 14769
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Audience: Government and Public
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The Elk River originates in the Central Vancouver Island Mountains and flows northeastward towards the Campbell River and into Discovery Passage. At the point where the river now enters the Upper Campbell Lake reservoir, it had a natural drainage area of 262 sq km. Although the entire natural Elk River drainage area has been part of Strathcona
Provincial park since its creation in 1911, the lower reaches of the river are extensively modified by direct and indirect, mostly man-made, interferences. The main impacts are thought to be:
clear-cut logging of the flood plain (mid-40's);
flooding due to a landslide into a headwaters lake (1946); road construction on the flood plain (mid-40's to present); flooding of the lowermost 10 krn of river by B.C. Hydro's Strathcona Dam;
complete diversion of Crest Creek into the Elk River (drainage area 17 sq km), increasing the drainage area by 25 per cent at the point of
diversion (to a total of 86 sq km) and by 6 per cent (to 279 sq km) at the mouth; and diversion of parts of the Heber River (maximum capacity 8.5 m3/s,
mean flow 3 m3/s) into the Elk River, which, increases the low to intermediate flows by some 60 to 80 per cent.
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Report Type
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Fish and Aquatic Habitat Information |
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Subject
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Region - Vancouver Island |
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Fish and Fish Habitat - Habitat and Stream Assessment |
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Fish and Fish Habitat - Impact Assessment |
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Fish and Fish Habitat - Management |
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Watershed Groups - 920 - Vancouver Island (East) Rivers |
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