Weger Holdings make up most of the rest. As with most watersheds on the northern California Coast, the most significant ecological problem in the area is increased erosion caused by logging, leading to excessive sedimentation in the river and its tributaries. Consequestly, the Big River has been listed as sediment and temperature impaired since 2003 under section 303(d) of the Clean Water Act. Legacy log jams also continue to block upstream migration for spawning salmonids. Current management of the Big River watershed aims to improve salmonid habitat while maintaining timber harvest through improved timber harvest practices. Modern timber harvest practices and regular road maintenance have led to reduced sedimentation and allowed continued harvest in 55% of the watershed. . See also List of rivers in California References Further reading Warrick, Sheridan F. and Elizabeth D. Wilson. Big River. The Natural History of an Endangered Northern California Estuary (Environmental Field Program Publication No. 6, 1981, University of California Santa Cruz) External links California Watershed Browser - Big River Watershed Rivers of Mendocino County, California Rivers of Northern California