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FIA# 4031504: The San Juan River watershed, managed by BC Timber Sales, Timber West Forest Corp. and
Teal Cedar Products Ltd., was identified as a candidate watershed for fish passage assessment
funding through the Forest Investment Account (FIA). M. C. Wright & Associates Ltd.
conducted fish passage assessments throughout the watershed from July 23rd to December
17th, 2010.
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Author: M.C. Wright and Assosciates Ltd.
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Date Published: Jan 2011
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Report ID: 24162
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Audience: Government and Public
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The San Juan River watershed, managed by BC Timber Sales, Timber West Forest Corp. and
Teal Cedar Products Ltd., was identified as a candidate watershed for fish passage assessment
funding through the Forest Investment Account (FIA). M. C. Wright & Associates Ltd.
conducted fish passage assessments throughout the watershed from July 23rd to December
17th, 2010. Mainlines and major branch roads including Hemmingsen Creek Mainline, Harris
Creek Mainline, Lens Creek Mainline, Fleet River Mainline, and Granite (Renfrew) Creek
Mainline were targeted first for field assessment followed by accessible spurs and then
deactivated roads. A total of 987 crossings were visited; 953 crossings did not qualify for full
assessments and 34 were fully assessed. Of the 953 non-assessed crossings, 136 were openbottomed
structures (bridges, wooden box culverts, etc.) and 817 were closed bottom structures
(cross-drains, round culverts with no fish habitat, etc.). UTM and photographic data were
collected for all structures visited.
Of the 34 assessed crossings, 32 were determined, using scoring criteria, to be barriers or
potential barriers to fish passage and proposed solutions were developed for each site. Habitat
gained index (HGI), channel gradient (>20%) and the potential existence of downstream
crossing barriers were used to eliminate 18 crossings from the immediate candidate list for
restoration. For the 16 crossings recommended as candidates for restoration two replacement
options were provided for each crossing, with pricing calculation estimates based upon span
and price per unit for each replacement structure. Also, the recommended crossings were put
through a cost benefit analysis and given a priority rating between 1 and 3 based on habitat
value upstream (high to low respectively). One priority 1 site was identified, followed by 11
priority 2 sites and 4 priority 3 sites.
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Report Type
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Fish and Aquatic Habitat Information |
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Subject
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Fish Species - Brook Trout - Salvelinus fontinalis |
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Fish Species - Chinook Salmon - Oncorhynchus tshawytscha |
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Fish Species - Chum Salmon - Oncorhynchus keta |
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Fish Species - Coho Salmon - Oncorhynchus kisutch |
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Fish Species - Cutthroat Trout (General) - Oncorhynchus clarki |
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Fish Species - Pink Salmon - Oncorhynchus gorbuscha |
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Fish Species - Rainbow Trout - Oncorhynchus mykiss |
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Fish Species - Sockeye Salmon - Oncorhynchus nerka |
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Fish Species - Steelhead - Oncorhynchus mykiss |
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Region - Vancouver Island |
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Fish and Fish Habitat - Culvert Fish Passage |
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Watershed Groups - 930 - Vancouver Island (West) Rivers |
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