As part of the Cemetery Brook Drain Tunnel Project, a portion of Mammoth Rd. between Porter St. to Nelson St. will be partially closed for a period of time. Local traffic and businesses will remain open. Traffic lanes will be shifted and no detours are planned.
- Closure begins: August 24, 2026
- Anticipated reopening: September 4, 2026
What to Expect:
- Traffic will be maintained on Mammoth Road directions.
- Northbound vehicular traffic lane will be shifted onto the southbound side of Mammoth Road.
- Expect temporary one-way alternating traffic patterns for period of times during construction.
- Pedestrian access will be maintained and closely coordinated by the contractor.
- Local businesses will remain open and driveway access will be closely coordinated by the contractor.
Important Notes:
- For lane shifts during construction, follow new lane markings and cones and allow extra travel time.
- Parking will be prohibited within the construction area
- Whenever possible, we encourage drivers to plan ahead avoid the construction area.
We appreciate your patience and cooperation as we work to enhance our community’s infrastructure.
Sincerely,
Environmental Protection Division
Department of Public Works
City of Manchester

As part of the Cemetery Brook Drain Tunnel Project, a portion of Cilley Rd. from South Beech St. to Willow St. will be closed for a period of time. Local traffic and businesses will remain open. See below figure for detour plan.
- Closure begins: August 10, 2026
- Anticipated reopening: September 30, 2026
What to Expect:
- Westbound traffic on Cilley Road will be detoured via South Beech St. and South Willow St.
- Pedestrian access will be maintained and closely coordinated by the contractor.
- Local businesses will remain open and driveway access will be closely coordinated by the contractor.
Important Notes:
- For lane shifts during construction, follow new lane markings and cones and allow extra travel time.
- Parking will be prohibited within the construction area
- Whenever possible, we encourage drivers to plan ahead avoid the construction area.
We appreciate your patience and cooperation as we work to enhance our community’s infrastructure.
Sincerely,
Environmental Protection Division
Department of Public Works
City of Manchester
