Confluence has been retained to quantify sediment loads from upland sources using GIS and Universal Soil Loss Equation (USLE) modeling strategies in the Boulder-Elkhorn TMDL Planning Area. Confluence has significant experience modeling sediment using GIS based USLE sediment models. We have successfully developed and implemented six watershed scale USLE models to characterize stream sediment: Upper Big Hole, Middle/Lower Big Hole, Jefferson River, Tobacco River, Lower Clark Fork, and Shields River. The models are used to characterize sediment loads and to establish potential load reductions in DEQ’s watershed planning process. DEQ will utilize the model to summarize the extent and effectiveness of existing and/or potential riparian buffer conditions as they relate to various sediment sources unique to land uses within the watershed. Various land use best management practices and other appropriate soil and water conservation practices will be developed.