Advanced Protection Management Program in the Russian River Watershed

The Action Plan establishes a 600-foot zone of influence for OWTS adjacent to perennial streams, which for the purposes of the Action Plan are blueline streams that are depicted on the USGS 1:100,00 scale topographic map, and a 200-foot zone of influence for lower class streams that are derived using a LIDAR dataset. The 600-foot distance is based on a microbial contamination zone that was recommended by the California Department of Public Heath (CDPH, 1999) to protect water supply from viral, microbial and direct chemical contamination.