South Fork Skokomish River Large Wood Enhancement Project - Aquatic Contracting

Hood Canal Ranger District, WA

AC was contracted by the Olympic National Forest to construct this large-scale stream enhancement project on the Skokomish River. Over 3000 whole trees with root wads were initially staged on over one mile of the Skokomish River by helicopter. AC staff then reconstructed an abandoned forest road to provide heavy machinery access before log jam construction.

Numerous log jams were constructed containing as many as 600 trees. Working closely with USFS staff, AC installed log jams along the edges of the main channel, on the floodplain, on active gravel bars, and at tributary outlets of the South Fork Skokomish River. To increase log jam stability, large portions of each structure were buried below the streambed. Whole trees were often buried as pilings and anchor trees to help increase stability. The final log jam constructed contained over 600 whole trees and was nearly 400 feet long, 16 feet high and over 60 feet wide. It is estimated to be one of the biggest engineered log jams ever constructed in the Northwest.

Team members included the Skokomish Nation, Olympic National Forest, Washington State SRF Board, and was designed by Brian Bair of the USDA Forest Service TEAMS Enterprise Unit.

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