Construction of the Upper Nisqually and Mt. Rainier Retrofit. This contract provides for the construction of roughness elements within the channel that will help protect the levee and revetment structures from the damaging high energy flows.
Construction of the Upper Nisqually and Mt. Rainier Retrofit. This contract provides for the construction of roughness elements within the channel that will help protect the levee and revetment structures from the damaging high energy flows.