DESCRIPTION
Mason County used this funding to replace a 36" diameter barrier culvert on an unnamed tidal stream with a 12-feet diameter culvert to restore fish passage. The stream is a tributary to McLane Cove and Case Inlet in eastern Mason County. The pre-existing culvert was rated as a total barrier to fish passage by the South Puget Sound Salmon Enhancement Group in 2002. This is likely a default rating since the stream area on both sides of the culvert is tidally influenced. The new culvert was designed to meet WDFW's "Stream Simulation" criteria. As such, it is passable to all life stages of fish. An artificial streambed designed to match the natural streambed composition above tidal influence was installed in the new culvert. Replacement of the culvert provided fish access to approximately 3500 feet of upstream habitat (there is another culvert barrier at this point), returned normal streambed transport function to the stream at the road crossing, and facilitated tidal infiltration to the pocket estuary upstream of the crossing. Fish use in the area includes coho, chum and coastal cutthroat. There is potential Chinook use within the tidally influenced portion of the stream. There is a small low intensity residential development near the project site. The upstream watershed is owned primarily by Green Diamond Resource Company and is managed under a habitat conservation plan.