TMDL approved by EPA on July 3, 1996
Upper South Fork Coquille Watershed
TMDL approved by EPA on March 23, 2001
Coquille River Watershed Mapping Tool
The Oregon Coquille River Watershed Total Maximum Daily Load Mapping Tool
is designed to help those working to improve vegetated buffers or riparian areas along the Coquille River. The tool allows users to identify high-priority riparian sites and helps ensure enhancements are made in areas where they will improve water quality. The tool shows users the amount of light and heat the sun delivers under existing riparian conditions and how much light and heat an improved riparian area could block. Many manmade and natural factors influence stream temperature. Reducing shade by removing riparian vegetation is just one activity that can contribute to stream warming. Elevated stream temperatures have been shown to limit aquatic life and salmonid and trout rearing and migration.
This tool also provides fish distribution information for multiple fish species and those using the tool can find areas where the potential to improve both water quality and fish habitat is high. Coquille River coho salmon are identified as threatened under the Endangered Species Act. The recovery plan for these fish emphasizes the importance of healthy riparian areas because they provide shade and maintain cool water temperatures for fish. Although riparian plantings take a long time to mature, this tool allows users to preview the potential for improving stream shade over time and provides a unique opportunity to track progress toward improving water quality in the Coquille River.
Supporting Assessment Reports
TMDL Initiated (Initial scoping and data collection phase)
TMDL approved by EPA on Oct. 7, 1988