Omaha CSO

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This map shows all completed CSO projects throughout the greater Omaha area as of January 1, 2025. Information on active projects can be found at: https://keepitcurrentomaha.com/

  1. 20th Street & Poppleton Street Sewer Separation Project (RNC) - This project constructed both sanitary and storm sewer, including a below ground stormwater storage facility.
  2. 24th St & Ogden St Sewer Separation - This federal stimulus supported project included construction of storm sewers to allow for conversion of existing combined sewers to sanitary sewers, resulting in reduced flows in the downstream combined sewer system and a reduction in size of downstream sewers.
  3. 26th and Corby Sewer Separation, Phase 1 - This project included construction of both sanitary and storm sewer. The existing combined sewer was converted to either stormwater or sanitary flows as appropriate.
  4. 36th Street Sewer Separation (State Street to McKinley Street) - This project constructed approximately 2,000-feet of new storm sewer to allow for conversion of the existing combined sewer to sanitary sewer.
  5. 39th Street & Fontenelle Street Sewer Separation Project (RNC) - This project bored beneath Sorensen Parkway near 39th Street to construct a sanitary sewer to a lift station and to provide sewer separation to the area.
  6. 42nd St & X St Sewer Separation - This federal stimulus supported project included construction of a new storm sewer to allow for conversion of the existing combined sewer to a sanitary sewer.
  7. 49th Street and Caldwell Street Sewer Separation (RNC) - This RNC project addressed sewer backups in the 49th and Caldwell Area and expanded sewer separation in the Country Club Avenue area, providing area separation and relief, until separated flows eventually combine together again in the Saddle Creek Trunk Sewer.
  8. Aksarben Village Neighborhood Sewer Separation - Storm sewers were constructed to allow for conversion of the existing combined sewers to a sanitary sewers. This project also included diversion of storm water flow from approximately 20 acres to a new green detention feature in Elmwood Park, reducing combined sewer overflows.
  9. Cole Creek CSO 204 Sewer Separation Phase 1 Project - This Phase 1project constructed a sanitary sewer project along 63rd Street from Taylor Street to Spaulding Street to provide capacity for future sewer separation areas in the basin.
  10. Country Club Phase 2 Sewer Separation Project (RNC) - Phase 1 involved separation of the main sewer line along Saddle Creek Road. Phase 2 included separation of sewers in the Country Club area.
  11. John Creighton Blvd & Miami St, Phase 1 and 2 Sewer Separation and Adams Park - This project constructed new storm sewers to allow for conversion of the existing combined sewer to sanitary sewer and provides sewer separation for the entire sub-basin. This project also includes green infrastructure in the Adams Park Detention Basin.
  12. Leavenworth Lift Station Replacement - Contract 1 included site demolition and grading improvements in advance of OPPD utility relocations. Contract 2 included construction of a new 45 million gallons per day lift station and grit facility providing increased capacity to be pumped through the new South Interceptor Force Main for treatment at the Missouri River Water Resource Recovery Facility.
  13. Martha Street Sewer Separation - This project included construction of both sanitary and storm sewers to provide separation in the residential areas in the west portion of the basin, construction of sanitary and storm sewers within Lauritzen Gardens, and grading and abandonment of existing sewers in Lauritzen Gardens. Separated sanitary sewer flows are redirected to the Blake Street Lift Station and subsequently new Riverview Lift Station.
  14. Miller Park to Pershing Detention Basin Sewer Separation - This project conveys separated stormwater from the Miller Park Detention Pond to the Pershing Detention Pond.
  15. Minne Lusa Stormwater Conveyance Sewer - This project included demolition of the former Gunderson Rail building located at the intersection of Paxton Blvd., John Creighton Boulevard and N. 31st Street.
  16. Missouri Avenue Sewer Separation/Spring Lake Park - Phase 1 project provided sewer separation for the northern ½ of this 416-acre basin , including green solutions, stormwater detention and wetlands.
  17. Missouri River Water Resource Recovery Facility Improvements - The improvements were completed through multiple construction projects.
    • Schedule A - Construction of a new industrial headworks facility (Schedule A) and dedicated conveyance to the secondary treatment facility to provide full treatment, including disinfection, of industrial flows during wet weather events.
    • Schedule B1 - Construction of a new municipal headworks facility and modifications to areas of the plant to provide capacity for preliminary and primary treatment of sanitary and combined sewer flows up to 150 million gallons per day.
    • Schedule B2 – Missouri River Water Resource Recovery Facility Improvements – The Schedule B2 project includes construction and modification to areas of the plant to provide capacity for treatment of additional wet weather flows, including chlorine contact basin, chlorine building, and odor control facilities located east of the plant access road.
    • Bank Stabilization – This project included stabilization of the river bank and soils to the west of the river bank to protect the water resource recovery facility and allow for future bank stabilization construction of the facilities associated with Schedule B2.
    • Wetlands – Mitigation of Missouri River wetlands disturbed as part of the Missouri River Water Resource Recovery Facility Wetland and South Interceptor Force Main projects. The mitigation project was constructed in the Fontenelle Forest area.
    • Missouri Avenue/Spring Lake Park Mitigation Plantings – This project includes the mitigation (replanting) of trees removed by the Spring Lake Park Sewer Separation project.
  18. Spring Lake Park, Phase 2 - The Phase 2 Project included the second phase of sewer separation to this 416 acre basin and included green infrastructure for stormwater detention and wetlands areas. Move after 16
  19. Nicholas & Webster Sewer Separation Phase 1 - This Phase 1 project included separation along Nicholas Street from 16th Street to 20th Street, and one block of sanitary sewer on 15th Street from California to Mike Fahey Drive.
  20. Nicholas Street Phase 1 (10th Street to 16th Street) - This project provides capacity for flows from other sewer separation projects upstream of the area and includes separation of the 11th Street corridor north of Nicholas Street. The project included demolition of the Former Economy Products Building and demolition of the Lund-Ross Building along the alignment of the Nicholas Street sewers.
  21. Nicholas Street Phase 2 to 23rd & Grace Sewer Separation - This project included construction of the extension of a 108-inch storm sewer north on 16th Street from the end of the Nicholas Street Phase 1 project to Charles Street. The project also included the extension of the 24-inch sanitary sewer to the 23rd & Grace Lift Station, resulting in the elimination of the pump station and continued operation and maintenance of the facility.
  22. Pacific Street - 63rd to 66th Sewer Separation (CSO 211) - This project constructed 1,000-feet of sanitary and 2,000-feet of storm sewer converting the existing combined sewer to either sanitary and storm sewer.
  23. Saddle Creek Area - 55th Street to 64th Sewer Separation - This project included construction of a storm sewer to remove creek flows from the existing Saddle Creek trunk combined sewer.
  24. Saddle Creek Retention Treatment Basin - This project included two construction contracts. The first contract included initial excavation and removal of soils from the site. The second contract included construction of a retention treatment basin system to reduce untreated overflows into Little Papillion Creek.
  25. South Interceptor Force Main - This project constructed a large diameter pipe along the Missouri River from the I-480 Bridge to to the Missouri River Water Resource Recovery Facility, replacing an existing, unreliable force main
  26. South Omaha Industrial Area Force Main & Gravity Sewer - This project constructed 3,000 feet of dual 18-inch force main and 3,000-feet of 30-inch gravity sewer/siphon to convey separated high-strength industrial waste flows to the Missouri River Water Resource Recovery Facility.
  27. South Omaha Industrial Area Lift Station - This project constructed a lift station to convey separated high-strength industrial waste flows to the Missouri River Water Resource Recovery Facility.
  28. South Omaha Industrial Area Sewer Separation - This federal stimulus supported project included separation of the high-strength industrial waste flows from the combined sewer system and directs flows to a new South Omaha Area Industrial Lift Station and pumped to the Missouri River Water Resource Recovery Facility.
  29. Spring Street Sewer Separation - This project constructed 120-feet of sanitary sewer under the BNSF railroad to connect to the existing Spring Street Lift Station, completing separation in the area.
  30. Webster St Sewer Separation, Phase 2 - This project constructed both sanitary and storm sewers to provide additional capacity through this area of redevelopment.
  31. Gilmore Avenue Sewer Separation, Phase 1 and 2 - This project included construction of new storm and sanitary sewers. Stormwater flows are directed to the south barrel and sanitary flows are directed to the north barrel. Peak stormwater flows are reduced by attenuated storage in the Harrison Street detention pond. This project included landscaping associated with the bioretention pond in Albright Park and the Harrison Street detention Pond.
  32. 42nd Street and Q Street Sewer Separation - This roject provides for sewer separation in the 42nd & Q area, resulting in elimination of CSO 207 and CSO 208 in the Papillion Creek South sub-basin. The project also included green infrastructure constructed in Hitchcock Park.

    Stormwater diverted from the residential area will infiltrate into the ground or be detained in the pond features.
  33. Hanscom Park Green Infrastructure - This project reduced the flow rate allowed into the combined sewer system to help mitigate CSO overflows by increasing the attenuation of stormwater flows in the pond and reducing downstream peak flows.
  34. Lake James to Fontenelle Sewer Separation - This project included partial separation of the system upstream from Fontenelle Park to remove stormwater from the combined sewer system and address sewer backups in the drainage area. Stormwater is discharged into the expanded Fontenelle Park Lagoon.
  35. Lake James to Fontenelle Park Lagoon Improvements - The Fontenelle Pond Improvements project expanded the storage volume of the Pond to detain stormwater and mitigate additional sewer system improvement downstream of the lagoon.
  36. Burt-Izard Lift Station Improvements  - The Burt-Izard Lift Station was upgraded to increase reliability and pumping capacity to 50 million gallons per day.
  37. Cole Creek CSO 202, Phase 1 and 2 Sewer Separation - This project included construction of sanitary and storm sewers to provide sewer separation to 101 acres in the area.
  38. Nicholas Street Sewer Separation, Phase 3 - The project included sewer separation north along 16th Street to Emmet Street.
  39. Riverview Lift Station Replacement  - The existing Riverview Lift Station was at capacity and required replacement to mitigate CSO discharges to the Missouri River.

    The Martha Street and Spring Street Sanitary flows were redirected to the new Blake Street Lift Station and Riverview Lift Station allowing the existing Spring Street Lift Station to be abandoned.
  40. Cole Creek CSO 203 Sewer Separation - This project included construction of both sanitary and storm sewer to allow for conversion of the existing combined sewer to either storm or sanitary sewer and provide separation to this 125-acre area.
  41. Cole Creek CSO 204 Sewer Separation, Phase 3 - This project phase included the extension of sewer separation east on Taylor from 60th Street and bounded by Taylor on the North, 56th on the east, Sprague Street on the South and 60th on the west.
  42. Papillion Creek North CSO 210 Sewer Separation - This sewer separation project included residential area separation to reduce CSO overflows.
  43. Monroe Street Lift Station Improvements Project - The project included significant improvements at the lift station to increase reliability and pumping capacity.
  44. Blake Street Lift Station - The Blake Street Lift Station receives combined flows from the Martha Street and Spring Street subbasins. The lift station conveys flows to the Riverview Lift Station.
  45. CSO 212 – Sewer Separation - This project included construction of storm sewer to provide sewer separation to this 41 acre sub-basin. The project reduced flows in the collection system and allow for the abandonment of CSO 212.
  46. 18th & Fort Sewer Improvements (RNC) - This RNC project is intended to reduce the surcharging of the combined sewer and ultimately reduced sewer backups into area homes.

  1. Forest Lawn Sewer Separation - This project provides removal of a stream from the Combined Sewer System. This project includedtial sewer separation in the eastern third of the Forest Lawn sub-basin. The removal of the stream resulted in decreased flows to the existing combined sewer system.

  1. South Barrel Conversion - This project includes construction of both sanitary sewer and storm sewer to allow for conversion of the existing combined sewer to storm sewer or sanitary sewer, as appropriate, in this 108 acre area sub-basin. This project would result in the South Barrel becoming a stormwater only system to the Missouri River and the North Barrel will remain a combined sewer directing lower flows to the Missouri River Water Resource Recovery Facility.
  2. Minne Lusa Relief Sewer (MLRS) Diversion Modifications - Active control facilities at 33rd and Paxton and 31st and Sprague to divert wet weather flows to the MLRS and subsequently the Northeast Omaha High Rate Treatment Basin.
  3. CSO 105 Outfall Active Control - Replaces the existing CSO 105 outfall with an larger weir structure to divert more wet weather flows south to the Northeast Omaha High Rate Treatment Basin prior to overflows occurring.
  4. 61st & Radial Storm Sewer - Diverts separated stormwater flows from the combined sewer system (CSS) and directs the flows into Cole Creek, reducing combined sewer overflows in the basin.
  5. Grace Street and North Interceptor DWF Diversion Rehabilitation - Rehabilitation of the existing gates for automated actuation allowing wet weather flows to be directed to the Northeast Omaha High Rate Treatment Facility.
  6. North Downtown Conveyance Sewer - 11th and Izard to 6th and Abbott - This tunneled sewer will convey up to 100 million gallons per day of wet weather flows from the 11th and Izard Active Control to the Northeast Omaha High Rate Treatment Facility.
  7. 11th and Izard Grit and Screening Facility - This project removes grit and screenings to mitigate the accumulation of debris in the North Downtown Conveyance Sewer and at the Northeast Omaha High Rate Treatment Facility.
  8. 11th and Izard Active Control - Diversion structure on Sewer 1040 at 11th and Izard Street to divert up to 100 million gallows per day of wet weather flows away from CSO 108 – Burt Izard, towards Northeast Omaha High Rate Treatment Facility.
  9. Northeast Omaha HRTB - 6th Street and Abbott Drive - 185 million gallons wet weather treatment facility includes grit removal, screening, solids setting, and disinfection of flows prior to discharge to the Missouri River.
  10. Cole Creek CSO 204, Phase 4 - These projects include construction of both sanitary sewer and storm sewer to allow for conversion of the existing combined sewer to either storm sewer or sanitary sewer and to provide separation to this 522-acre area.
  11. South Interceptor Force Main Abandonment - This is a future project to abandon facilities.

  1. Hickory Street Sewer Separation - This project includes construction of both sanitary sewer and storm sewer to allow conversion of the existing combined sewer to sanitary sewer and storm sewer, as appropriate, to provide sewer separation to this 95 acre sub-basin.
  2. Jones Street to Leavenworth Diversion Structure - This is a future project to reduce overflows by directing flow to the future Leavenworth Storage Tank.
  3. East Cole Creek Interceptor Rehabilitation - Repairs to approximately 2 miles of existing sewers to mitigate inflow and infiltration into the collection system.
  4. 21st and Cuming Active Control - Diversion structure located at 21st and Cuming Streets to divert wet weather flows away from CSO 108 – Burt Izard, towards Northeast Omaha High Rate Treatment Facility.
  5. Leavenworth Basin Storage Tank (CSO 109) - This project includes a 5.5 million gallon CSO storage tank located north of the Leavenworth Lift Station.
  6. Pierce Street Sewer Separation - This project includes construction of storm sewer conveyance to allow conversion of the existing combined sewer to sanitary sewer and provide sewer separation to this 67 acre sub-basin.