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CSO 204 Phase 4a – 57th Street & Pratt Street; and Phase 4b – 56th Street & Bedford Avenue

The CSO Phase 4 Project is a multi-phase project located in a 522 acre basin referred to as Cole Creek CSO 204. It is bordered on the north by Brown Street, on the east by 52nd Street, on the south by Northwest Radial Highway, and on the west by Cole Creek.

Phase 4 is located on the southeast portion of the Cole Creek CSO 204 basin. The downstream portion of the CSO 204 Phase 4 Project will discharge (connect) to the Cole Creek CSO 204 Area, Phase 3 Combined Sewer Separation (Taylor to Ruggles between 56th and 61st) Project facilities that are to be constructed in 2021.

Project Benefits

This project is Phase 4 of approximately four planned phases that will convert the existing combined sewers to either storm or sanitary sewer plus providing additional capacity with new sewers. It will ultimately result in reduced sewer backups into area homes and reductions in combined sewer overflow volume and flow rate to Cole Creek, improving its water quality.

Additional benefits of the CSO 204 Phase 4 Project include:

  • Street flooding and sewer backups will decrease in occurrence
  • Rehabilitation of sewer, manhole and storm inlet pipes within the CSO 204 Phase 4 limits identified by the Project Team
  • Stormwater flows to the Papillion Creek Interceptor system will be reduced from the CSO 204 area, resulting in additional capacity in the interceptor for sanitary flows
  • New streets will be constructed or an asphalt overlay will be placed following construction
  • New ADA-compliant ramps will be installed at intersections impacted by construction
  • Sidewalks will be replaced within the limits of construction

Additional Resources

In lieu of a public meeting at this time due to COVID-19, we have prepared a short summary video that explains this project in much greater detail. Please do not hesitate to reach out to the team listed below with any questions you may have.

Video Thumbnail

factsheet.png   Project Factsheet


Field work in advance of design is underway for the Phase 4a and 4b Projects. Conceptual design deliverable is anticipated in spring 2022.

Contact Information

City of Omaha
Public Works Department
D Anselme Nassa

Carollo Engineers
Weston Engel

Public Facilitator
Felsburg, Holt & Ullevig
Dave Lampe

Project References

Project Number:  OPW 53820

LTCP Project Name:  CSO 204 Phase 4a – 57th Street and Pratt Street; CSO 204 Phase 4b – 56th Street and Bedford Avenue