Welcome to the Cemetery Brook Drain Tunnel (CBDT) Project Work Status Page!
This page is your window into one of Manchester’s largest infrastructure projects. Here, you can explore updates on construction progress and see how the CBDT team is advancing work beneath and around the City.
The map below highlights the tunnel alignment, including the Launch Trench and Drop Shafts (DS) 1 through 7. Beneath the map, you’ll find descriptions of ongoing activity at each location.
Curious about how it all works or looking to understand some technical terminology? We invite you to watch our project video on the homepage for an inside look at the engineering and innovation behind the Cemetery Brook Drain Tunnel.
Launch Site – Queen City Ave. Bridge
- Preparation for arrival of tunnel boring machine (TBM), arrival mid 2026
- Preparation for the construction of the Launch Trench
Drop Shaft 1 – Intersection of Brown Ave. And Queen City Ave.
- Preparing for building demolition
Drop Shaft 2 – Between Union Street and Beech Street
- Support of excavation (SOE) instillation
Drop Shaft 3 – Near Somerville St. and Maple St.
Drop Shaft 4 – Near Wilson St. and Hayward St.
- Work to commence early 2026
Drop Shaft 5 – Between Taylor St. and Cypress St.
Drop Shaft 6 – On Massabesic across from Elliot Hospital
- Work to commence late 2025
Drop Shaft 7 – On Mammoth Rd. at Rockingham Trail