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CBDT Project Map and Photos

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.

Cemetery Brook Tunnel Status Map 

 

How to use map:

To access the legend: Click the box in the top left hand corner. To Zoom: Either use the scroll on your mouse, or click the +/- in the bottom right hand corner. To Pan: Click and drag the map. Basic Information: Click on any portion of the line to activate pop-up window. If the pop-up has arrows at the top left corner, use these to access more information.

Cemetery Brook Work Location and Work Status

Please refer to the "Project Progress Photos" link on the right side of this page for photos of the activities listed below. 

Launch Site – Queen City Ave. Bridge
  • Installation of concrete floor slabs and walls of the launch trench
  • Installation of push frame and working area for placement of the tunnel boring machine (TBM) in the launch trench
  • Installation of slurry plant for TBM operation
  • Site preparation for TBM support utilities and systems
  • Support of excavation (SOE) construction completed
  • Excavation of Launch Trench completed
  • Ground improvements beneath the railroad crossing completed
Drop Shaft 1 – Intersection of Brown Ave. And Queen City Ave.
  • Installation of vent shaft
  • Controlled blasting of rock
  • Building demolition complete
  • Support of excavation (SOE) complete
Drop Shaft 2 – Between Union Street and Beech Street
  • Controlled blasting for rock excavation 
  • Rock excavation for adits (horizontal tunnels to connect drop shaft to tunnel)
  • Support of excavation (SOE) complete
  • Ground improvement work for tunnel complete
Consolidation Drain Pipe - Cilley Rd, S. Willow St, Queen City Ave & Union St
  • 60-inch drain pipe and manhole installations
  • Sewer lining work complete
  • Watermain relocation complete 
Drop Shaft 3 – Near Somerville St. and Maple St.
  • Controlled blasting for rock excavation
  • Preparation for ground improvements
  • Support of excavation (SOE) complete
Supplemental Vent 2 - Near Maple St. and Silver St.
  • Preparation for ground improvements
Drop Shaft 4 – Near Wilson St. and Hayward St.
  • Preparation for support of excavation (SOE)
  • Building demolition complete
  • Removal of site utilities complete
Drop Shaft 5 – Between Taylor St. and Cypress St.
  • Preparation for support of excavation (SOE)
  • Site clearing is complete
  • Site utility preparation is complete
Drop Shaft 6 – On Massabesic across from Elliot Hospital
  • Site utility preparation
  • Building demolition complete
Drop Shaft 7 – On Mammoth Rd. at Rockingham Trail
  • Work to commence in 2027  
Entrance Box Culvert – On Rockingham Trail
  • Work to commence in 2028  
Tunnel Boring Machine (TBM)
  • Delivery of TBM overland to the site
  • Delivery of support gantries (gear that follows the TBM into the tunnel) complete
  • Fabrication and shipment for Germany of TBM is complete
  • Recently named by students at Hillside Middle School, refer to News and Publications page

TBM_Fabricated_In_Germany

 

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