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Scope/Content: Abstract: A dam removal study is being conducted on the Boardman River near Traverse City, MI for the Great Lakes Fishery and Ecosystem Restoration (GLFER) program with the U.S. Army Corps of Engineers- Detroit District (USACE). The study extends from the mouth of the river at Grand Traverse Bay, through four dams to reconnect 24 miles of anadromous cold-water fish habitat. Hydropower had been generated at three of the four dams, but generation has ceased due to lack of economic viability. A historic sediment budget and a Sediment Impact Assessment Model (SIAM) were developed and calibrated to document existing sediment erosion, transport, and deposition patterns within the study reach and impoundments. The results of the SIAM modeling indicated that outside of the impoundments, the river is relatively stable. Over the lifetime of the dams, a significant amount of sediment has accumulated in some of the reservoirs. Calibration of SIAM required a number of iterative adjustments of sediment transport and particle size parameters to best match observed processes. Calibrated sediment budgets agreed with data for the sediment deltas at the upstream end of the two main reservoirs however, sediment budget deficits below two of the dams did not match observed field conditions. The results of these analyses indicate SIAM can be a useful tool for identifying general sediment budget trends and when more comprehensive sediment transport analyses and modeling are required. Final results will be used to determine which removal scenarios will be most feasible. Scope/Content: Dam type: earthen Scope/Content: Dam type: embankment Scope/Content: Length: 1,800 ft Scope/Content: Date constructed: 1921.