Buffalo Street Stormwater Drainage Study

The City requested that American Structurepoint evaluate the existing conditions and develop stormwater management alternatives to alleviate the flooding problem in the park by providing positive drainage for the capacity the storm sewer can deliver. Additionally, the City requested that our company evaluate what should be done with the existing 36-inch storm sewer where it crosses Buffalo Street. There is a significant proposed development along Buffalo Street currently in the planning stages that includes a gravity sanitary sewer that will flow north to a proposed sanitary lift station. The final engineering recommendation was the replacement of the existing 1,000-gpm Central Park Lift Station with a 5,000-gpm lift station. The gravity relief line reduces the capacity available from areas upstream of the Park at higher Lake Levels, but is the most economical option for improving system performance by utilizing gravity conveyance in lieu of pumped conveyance. In addition, the recommendation including running all system flows through a BMP to reduce sediment to both the Lake and the 36-inch pipe which has several sags.