During the summers of 2006, 2007 and 2008 the GRCC program performed erosion control projects within Big Finley, Little Finley, Buck, Deerlick, Eubanks, and Nooning Creeks; all tributaries to the Mattole River. Approximately 70,760 cubic yards of sediment have been prevented from entering the Mattole River watershed. Several miles of road have been reshaped through crowning and outsloping. Over fifty culverts have been installed, all designed to withstand a 100-year flood events. Some of the most significant work included replacing old culverts that were impeding fish access and installing bottomless pipe arches. These structures allow salmon and steelhead trout to freely migrate under the road expanding their spawning and rearing habitat.