Kennedy Park Sewer Separation
South Bend, Indiana
As part of the city’s Long Term Control Plan, this project eliminated the stormwater flow from the combined sewer system, which caused numerous basement backups and contributed to combined sewer overflows downstream of the neighborhood. After the feasible solutions were determined, a public meeting was held to receive feedback from the affected homeowners to foster community buy-in. The new storm sewer eliminated the combined flows from Olive Street to Bendix Drive and from Lincolnway to Bendix Drive.
All stormwater runoff within the neighborhood is handled by allowing percolation into the ground throughout the neighborhood. This solution was feasible because the soils within the neighborhood are sandy with a high percolation rate. Separation of the combined sewer eliminated the basement backups within the neighborhood and potentially within other neighborhoods located downstream. This increased the overall health benefits to the residents by eliminating the presence of raw sewage in their basements.
Design of the new storm sewer system used low-impact development (green) solutions, including rain gardens, bioretention areas, underground infiltration basins, and curb turnouts with swales. By using this mixture of green solutions, American Structurepoint was able to greatly decrease the pipe sizes and lengths required for the storm sewer, which helped offset the costs for the infiltration basins, plantings for the bioretention areas, and increased pavement removal to maintain positive drainage. The project saved the City in excess of $2 million when compared to traditional gray infrastructure.
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