The Matanuska-Susitna Valley is one of Alaska's fastest growing residential areas. The USFWS and the Alaska Department of Fish and Game inventoried 173 structures on secondary roads in several area watersheds. Final analysis is still underway, but initial reviews suggest that close to 90% of the culverts do not pass anadromous fish at some life stage. The results of this survey have led to greatly increased interest in fish passage restoration by the Borough (County) government.