Omaha CSO

Skip to content

Nicholas Street Sewer Extension, Phase 3

The Nicholas Street Sewer Extention Phase 3 Project includes further extension of the storm trunk sewer from the Phase 2 junction structure at 16th & Charles to the north and west to serve additional areas in the Burt-Izard Basin. The project has been broken up into two separate projects — Phases 3A and 3B.

  • Phase 3A: Phase 3A involved constructing a storm sewer pipe in 17th Street tied into the storm sewer constructed through Kellom Greenbelt in the Nicholas Phase 2 project. Additional pipes were constructed in Clark Street to pick up the 16th, 17th and 18th Street intersections. This initial project eliminated the possibility of street overtopping along 16th Street and removed additional storm inlets on 16th Street that tie into the City’s sanitary system, a system that has a history of surcharging.
  • Phase 3B: In Phase 3B an 84-inch to 15-inch storm trunk sewer will be constructed along 16th Street from Charles to Lothrop Street. Additional storm sewers will be constructed in Corby Street, Lake Street, Grace Street, 18th Street and Florence Boulevard. All sewers will be constructed by open cut methods of construction. A new 12-inch sanitary sewer in 16th Street will replace an existing 8-inch sanitary constructed in the 1880s. Additional sanitary sewers will be constructed in Willis Avenue and Corby Street.

Project Benefits

This project will reduce the combined flows downstream of the project area and thereby reduce combined sewer overflows to the Missouri River. In addition, full pavement removal throughout the extent of the project will take place. Along 16th Street, the street pavement will be narrowed and provide bike lanes and parking. Restoration will include sidewalk replacement and ADA compliant ramps.

PICTURED ABOVE: The Long Term Control Plan (LTCP) for the CSO Program includes a variety of CSO control projects, ranging from sewer separation to high-rate treatment facilities as well as green infrastructure projects, all implemented under the oversight of the City and Program Management Team. 

factsheet.png   Project Factsheet


The Nicholas Street Sewer Extension Project is being constructed in two phases, Phases 3A and 3B. Phase 3B construction will take place in years 2021 through 2024. Metropolitan Utilities District will be replacing a large gas pipeline on the east side of the 16th Street corridor prior to Phase 3B construction. Other utilities will be relocating their respective utilities in the 2020 and 2021 time period.

Phase 3B construction contract was awarded in May 2021, with construction expected to begin in September 2021.

Completed Date

  • Phase 3A – Q3 2020

Cost at completion

  • Phase 3A – $1.9 million

Contact Information

City of Omaha
 Chris Driscoll, PE

Project Manager
Lamp Rynearson & Associates
Mike McIntosh

Public Facilitator
Emspace + Lovgren
Brian Kaminski

Project References

Project Number: OPW 52721

LTCP Project Name: Nicholas Street Sewer Separation, Phase 3A

Project Number: OPW 53753

LTCP Project Name: Nicholas Street Sewer Extension, Phase 3B