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A five-year study was performed to compare conditions in the Pilchuck River before and after channel reconstruction associated with rerouting highway SR-2. The study focused on sediment particle-size analyses, benthic macro-invertebrates and fish. Substrates comparable to control areas developed in all portions of the new channel within one year after construction. The available data on invertebrates and fish gave no indication of deterioration in diversity, quantity or size in the reconstructed channel. The report provides recommendations for further improvements in the design of stream channel changes should there be no alternative to their construction.

Publication Date:

Wednesday, September 1, 1982

Publication Number:

WA-RD 039.15

Last modified:

10/12/2016 - 15:40

Authors:

Richard R. Horner, Eugene B. Welch.

Originator:

University of Washington. Environmental Engineering and Science Program.

Number of Pages:

41

Subject:

Benthos, Biodiversity, Channels (Waterways), Design, Environmental impacts, Environmental quality, Fishes, Grain size (Geology), Recommendations, Rivers, Sediments, Stream restoration, Streambeds, Substrates (Waterways)

Tags:

rivers

channel reconstruction

sediments

benthic macro-invertebrates

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Highway Runoff Monitoring: The Initial Year, (WA-RD 39.3).
Composite Sampling of Highway Runoff: Year 2, (WA-RD 39.4).
Criteria and Requirements for Statewide Highway Runoff Monitoring Sites, (WA-RD 39.5).
Characterization of Highway Runoff in Washington State, (WA-RD 39.6).
Year 3 - Runoff Water Quality, August 1979 - August 1980, (WA-RD 39.7).
Views of Risk and Highway Transportation of Hazardous Materials - A Case Study in Gasoline, (WA-RD 39.8).
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Guide for Water Quality Impact Assessment of Highway Operations and Maintenance, (WA-RD 39.14).
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Impacts of Channel Reconstruction in the Pilchuck River