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Extended Abstract. Watershed models are essential tools in TMDL development and implementation. Various models are available with varying capabilities, strengths and weaknesses (Borah et al. 2006). One common weakness to all the watershed models is lack of stream bank erosion simulation, whereas, stream bank erosion is a major contributor of sediment in many watersheds. As reported in the literature (Gianessi et al. 1986), eleven percent of total erosion in the U.S. is attributable to stream bank erosion in an average. Fully developed stream bank erosion models are limited (ASCE 1998). Recent stream bank erosion modeling efforts include Chu-Agor et al. (2009), Clark and Wynn (2007), and Ulrich and Nieber (2008). Integrated watershed and stream bank erosion model is almost nonexistent. Therefore, the objective of this ongoing study is to combine the Dynamic Watershed Simulation Model (DWSM) (Borah et al. 2002; 2004; 2007) simulating hydrology, upland and streambed erosion, and sediment transport with a detailed stream sediment transport model STREAM (Borah and Bordoloi 1998a; 1998b; ASCE 1998) with capabilities of graded sediment transport, formation of bed armoring, and stream bank erosion.