The City of Sioux Falls is experiencing continued growth on the west side. To accommodate this growth, the Basin 15 sanitary sewer system needs to be extended. Basin 15 is located NW of current city limits and will ultimately serve up to 28,000 acres over the next one hundred years. This area was identified as a future growth area in the Feb. 2018 City of Sioux Falls Treatment and Collection System Master Plan. HDR Engineering, Inc. is contracted to perform design services for the extension.
Phase 1 of this project will include a sanitary lift station as well as a 10,200 foot (1.9 mi.) long force main that will discharge into the City’s existing collection system near W. Madison Street and N. La Mesa Drive. The pump station will be on City owned property. The property is located west of Skunk Creek near a N/S section line (reference the Basin 15 Area Overview figure for phasing and alignment) and will pump continuously via the force main to the existing sanitary sewer system.
Phase 2A of the project will direct gravity flow to the lift station which parallels the N/S section line and extends from the lift station to the north side of W. 12th Street/SD Highway 42. The total length of this portion of the project is approximately 4,500 feet.
Phase 2B of the project continues south and starts on the north side of W. 12th Street/SD Highway 42 where the sewer will tie-in to a manhole that will be constructed as part of the Phase 2A project. This alignment extends south (following Cherry Creek) for approximately 4,850 feet where the project ends on the north side of W. 22nd Street.
Phase 2C of the project includes a 5.0-million-gallon equalization basin and an equalization lift station. This lift station is anticipated to be combined with the sanitary lift station needed for Phase 1 and will convey Basin 15 flows to the new EQ basin, in a peak event, and continuously via the force main constructed in Phase 1.