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CSO/SSO FACILITIES
FEATURED PROJECTS


Upper Rouge CSO Tunnel DWSD CS-1402



Dearborn CSO Control Project



Belle Isle Pump Station and CSO Improvements DWSD CS-1363



Conner Creek Pilot CSO DWSD CS-1284





Sigma offers extensive experience in the analysis, study, and design of storm water system, as well as, combined and sanitary sewer overflows and control facilities.

Our expertise includes the design and needs analysis of various processes and configurations of enclosed storm drains, open channels, and culverts; detention basins; screening conveyors and mechanically cleaned bar screens and associated influent channels; process, mechanical, and sampling piping; dewatering and flushing gate systems; sodium hypochlorite storage, feed, and mixing systems; and odor control, heating, and ventilating schemes.
  • NPDES Permit Negotiation and Feasibility Study
  • Project Plan and Basis of Design
  • Flow Monitoring, Hydraulic Modeling, and SSES Study
  • Alternative and Monetary Analyses
  • State SRF Funding
  • Disinfection and Odor Control Systems
  • Complete Design of Storm Water and CSO Facilities
  • Construction Documents and Specifications
  • Construction Management
  • SSO Analysis and Permit Negotiation
  • Footing Drains Disconnection Program and Analysis
  • CMOM (Capacity, Management, Operation and Maintenance) Analysis
  • Storm Water Permit and Management Assistance


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