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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 Campbell River 2016 Site 7-IV gravel placement project was constructed from 8 to 12
August 2016 and involved the placement of 4,300 metric tonnes of washed and screened
spawning gravel into the Campbell River. Rows of large boulders were also placed in an attempt
to retain the spawning gravel during high flows.
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Author: Northwest Hydraulic Consultants Ltd.
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Old Reference Number: COA-F17-F-1258
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Old Reference System: FWCP Fish Wildlife Compensation Program - Coastal
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Date Published: Mar 2016
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Report ID: 52595
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Audience: Government and Public
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The Campbell River 2016 Site 7-IV gravel placement project was constructed from 8 to 12
August 2016 and involved the placement of 4,300 metric tonnes of washed and screened
spawning gravel into the Campbell River. Rows of large boulders were also placed in an attempt
to retain the spawning gravel during high flows. The gravel was placed at Site 7, which is 300 m
downstream of the BC Hydro John Hart Generating Station between the right bank and
downstream end of First Island. This project has now been completed four times since 2006,
giving this latest project the title Site 7-IV.
The purpose of the project was to increase the available spawning habitat for Chinook salmon
and other riverine species. Strategic placement of spawning gravel for Chinook salmon in
historically important areas of the mainstem Campbell River is a priority Habitat Based action
in the Campbell River Salmonid Action Plan (FWCP, 2011). The finished spawning platform had
an undulated surface, with four large boulder gravel retaining structures spaced approximately
20 m apart on the existing river bed in an attempt to keep the gravel in place during high
scouring flows. The constructed platform is approximately 100 meters long, and ranges from 20
meters wide at the upstream end to 27 meters at the downstream end, with a surveyed top
area of approximately 2,250 m2. Based on the assumption of one spawning pair of Chinook
salmon per 10 m2 of gravel platform (Burt, 2004), this project supplied spawning habitat for 225
pairs of Chinook.
During construction, flows in the Campbell River were held steady at 30 m3/s. Chinook salmon
were observed spawning on the gravel pad in October 2016 at a river discharge of 130 m3/s. Due
to large amounts of rainfall, flows in the Campbell River increased to 650 m3/s on 10 November
2016. Discharge since that time has been approximately 100 m3/s. The high discharges make
assessment of the site difficult; however, it is believed that much of the placed gravel was
mobilized downstream because the design calculations showed the gravel was stable for flows
up to about 260 m3/s.
Funding for this project was supplied by the Fish and Wildlife Compensation Program (FWCP),
Campbell River Salmon Foundation (CRSF), and the Department of Fisheries and Oceans (DFO).
DFO and CRSF also provided input to the project design and construction process. Engineering
services, project management, construction supervision, and reporting were provided by
Northwest Hydraulic Consultants Ltd. (NHC). Materials and construction services were provided
by Upland Contracting Ltd. Environmental monitoring and site security was provided by ATlegay
Fisheries Society.
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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 - Restoration |
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Water Information - Restoration |
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