Hoh River Emergency Watershed Project

In late November and early December 1998, floods on the Hoh River caused severe streambank erosion adjacent to the main water supply well for the Hoh Indian Reservation in Jefferson County, Washington. Following a damage survey, it was determined that the site was eligible for assistance under the NRCS Emergency Watershed Program. On December 18^th, the Multi-State Design Team completed a design consisting of three rock vanes to protect 500 feet of bank adjacent to the well. Each vane was 140 feet long, angled at 25 degrees from the bank tangent, and contained 3,000 tons of rock riprap. The vanes were installed in January 1999, while waters were still above seasonal averages. The vanes successfully protected the bank immediately upon completion. Since that time, the vanes have recruited wood debris and have allowed the establishment of bank vegetation.

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