Retrofit of the existing undersized Osgood basin to reduce fine sediment particles and nutrients in a high-priority, directly-connected catchment that discharges direclty into the Ski Run Marina. Expansion of the basin to the east would require a higher berm, and proportionally larger footprint to overcome the challenges with the high groundwater table onsite. Alternative options may include a bypass to the Wildwood basins that would provide additional treatment once the the capacity of the currently undersized Osgood basin is exceeded. This project has been incorporated in the Upper Bijou Park Creek Project (EIP #01.01.01.0184).