Harlem Baden Combined Sewer System Seperation and Detention

Harlem Baden Combined Sewer System Seperation and Detention

Client: Parsons Owner: Metropolitan St. Louis Sewer District Year Completed: 2015

​ M3 Engineering Group was part of the team that designed a solution for combined sewer backups and flooding in North St. Louis, within MSD's Bissell Point sewershed near Clara and Greer Avenues. The project was estimated to cost $28M in construction and included "soft separation" of 26,000 feet of sewers and storage of approximately 300 acres of runoff into a new 2.4 million cubic foot detention basin. M3 Engineering's role included developing the rainfall calibration templates and XP-SWMM hydrologic model, assisting with development of the GIS database and alignment alternatives, and QA/QC for detention basin design and water quality impacts.

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