Yosemite Slough Wetland Restoration

On behalf of the California State Parks Foundation and working collaboratively with the U.S. Army Corps of Engineers, U.S. EPA and other public agencies, Northgate initiated the nature-based design having characterized 230,000 cubic yards of artificial fill materials some of which was contaminated with various metals and hydrocarbons. The goal of the design was to restore the historical wetlands and living shoreline using as much of the on-site fill materials as possible, thus minimizing waste generation and making the project feasible. On-Site and imported fill materials were identified to meet regulatory requirements for wetland cover and other wetland and upland soils. Northgate prepared support and construction documents, the Long-Term Management Plan, and working with State Parks, oversaw the construction.