Bear River State Park Erosion Mitigation

Service Areas

Engineering, Natural Resources

Project Description

High water flows resulted in shoreline erosion including several undercut banks and areas of failure near the concrete walking path at Bear River State Park. In 2020, Y2 Consultants provided an existing conditions survey of the river profile with cross sections, edge of water, top and bottom of bank, and current water level.

The bank was severely eroding so Y2 designed a reinforced bank with riprap. A section of the failing bank was constrained by a sidewalk running parallel to the river, which did not allow for the typical design. To avoid additional construction cost, the riprap slope was increased beyond the typical slope and a small, reinforced wall was added along the sidewalk. Relevant permits were obtained from the US Army Corps of Engineers and the Wyoming Department of Environmental Quality. During construction, frequent communication helped to facilitate the best results for installation of erosion mitigation countermeasures. Y2 then developed construction drawings, specifications, a bid form for the project, and management and coordination of pre-bid meetings. Y2 provided contractor management and coordination, construction monitoring, turbidity monitoring, installation quality assurance for the remediation, and assisted in the reseeding and willow installation of the stream bank.