MADISON — Portions of the Military Ridge Path and Cannonball Path between McKee Road and Dunn’s Marsh, as well as the Velo UnderRound, will be closed starting Monday as construction begins on Madison Metropolitan Sewerage District’s Nine Springs Valley Interceptor.
Detour signage with wayfinding maps has been posted in the construction area and along nearby trail connections to help trail users navigate the construction area. The detour map can also be found at https://link.madsewer.org/NSVI-Project.
This construction project is necessary to replace 4,200 lineal feet of deteriorating sanitary interceptor. An interceptor is the largest component of a sewer network. It receives flow from small sewer lines and directs sewage to the wastewater treatment plant. The portion of the interceptor that is being replaced in this project was built in 1965.
Serving Madison’s west side, Middleton and the cities of Fitchburg and Verona, this project also accommodates increased capacity from these fast-growing parts of the District’s service area.
As a majority of the interceptor runs adjacent to or under the Military Ridge and Cannonball paths, the project includes restoration of the trails as well as other improvements. These improvements include new lighting at Velo UnderRound roundabout; additional signage for trail amenities; removal of invasive species; and restoration of native species in select areas. The District has also avoided disturbing local wetlands to the maximum extent possible.
Learn more about the project and see the detour map at https://link.madsewer.org/NSVI-Project.