<think>.pdf

U.S. EPA Region IX has finalized a Total Maximum Daily Load (TMDL) for temperature and sediment in the Upper Main Eel River watershed, including Tomki Creek, Outlet Creek, and Lake Pillsbury. The TMDL addresses critical fish population declines, elevated stream temperatures, and excessive sedimentation identified in the area. Temperature modeling assessed solar radiation impacts, shade allocations, and seasonal variations to determine heat loading capacity and allocations for the Van Arsdale to Outlet Creek segment. Sediment TMDL analysis identified key sources through erosion modeling, terrain type, land use associations, and management practices, establishing sediment delivery targets and allocations. The document specifies load allocations across the watershed, incorporates a margin of safety for critical conditions, and outlines implementation and monitoring measures. It includes detailed water quality standards, temperature categories, sediment indicators, and baseline erosion data from 1940–2004. Public participation mechanisms and contact information for further inquiries are provided. This TMDL was approved by the EPA Water Division Director on December 29, 2004.