Project overview
This project aims to provide additional capacity to the Nine Springs Valley Interceptor (NSVI). This is Phase 1 of a multi-phase project that will address capacity needs to prevent sanitary sewer overflows, basement backups, protect the environment and respond to community growth.
The NSVI is primarily located in the City of Fitchburg and conveys flows from Pumping Station 12 to Pumping Station 11. Portions of the existing interceptor are located in the Nine Springs Creek, Lewis Nine Springs E-Way environmental corridor, Capital Springs Recreation Area and the Cannonball Path shared-use trail corridor. The NSVI serves the City of Fitchburg, City of Verona, Town of Verona, City of Madison, City of Middleton and the Town of Middleton.
View an Overview Map of the NSVI system.
The majority of the NSVI is original to the 1965 construction. There have been two replacement projects, but the remainder of the interceptor needs additional capacity. During extreme wet weather events in 2018, two overflows occurred due to a lack of system capacity. Population and wastewater forecasts indicate that most of the original NSVI will require additional capacity.
The District is coordinating with the City of Fitchburg, City of Madison, Dane County, Capital Area Regional Planning Commission (CARPC) and other entities for this project.
Project phasing
Phase 1: Pumping Station 11 north of Clayton Road at Larson Road to north of McCoy Road at Herman Road. This portion of the NSVI project is outlined in this Phase 1 project page.
Phase 2: Pumping Station 12 at 2739 Fitchrona Road to the north and west side of Goose Lake near the Military Ridge State Trail. This portion of the NSVI project is a separate, concurrent project titled Nine Springs Valley Interceptor Capacity Improvements (Phase 2). View the Phase 2 project page.
Phase 3: North of Clayton Road at Herman Road to Fitchburg Springs Park. This portion will be completed approximately 2035, subject to change.
Phase 4: Fitchburg Springs Park to West of Dunn’s Marsh, primarily along the Capital City Trail and Cannonball Path corridor. This portion will be completed approximately 2040, subject to change.
View a Phasing Map for NSVI projects.
See a map of the District's collection system.
Public involvement
Three public information meetings are anticipated for the Nine Spring Valley Interceptor Capacity Improvements (Phase 1) project.
- Public Information Meeting #1: TBD
This meeting will include a presentation on the project background, alternative routes and an anticipated schedule. A public question and comment period will follow the presentation. A recording of the public meeting will be available on this webpage within 5 business days following the meeting. - Public Information Meeting #2: TBD
- Public Information Meeting #3: TBD
