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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

• Preparation of coffer-dam installation and support of excavation for the outfall structure
• Installation of concrete floor slabs and walls of the launch trench
• TBM support utilities and systems for TBM operation
• Commissioning of the muck handling system, water treatment plant and slurry plant 
• Installation of TBM staff offices and facilities
• Placement of TBM and support gantries into the launch trench completed
• Installation of push frame and working area for placement of the tunnel boring machine (TBM) in the launch trench completed
• Installation of slurry plant for TBM operation completed
• 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.

• Controlled blasting of rock and placement of rock supports
• Installation of vent shaft completed
• Building demolition completed
• Support of excavation (SOE) completed

Drop Shaft 2 – Between Union Street and Beech Street

• Placement of concrete for adit structure and de-aeration chamber
• Controlled blasting for rock excavation completed
• Rock excavation for adits (horizontal tunnels to connect drop shaft to tunnel) completed
• Support of excavation (SOE) completed
• Ground improvement work for tunnel completed

Consolidation Drain Pipe - Cilley Rd, S. Willow St, Queen City Ave & Union St

• 60-inch drain pipe and manhole installations
• Sewer lining work completed
• Watermain relocation completed

Drop Shaft 3 – Near Somerville St. and Maple St.

• Ground improvements for tunnel
• Preparation for concrete placement
• Controlled blasting for rock excavation completed
• Support of excavation (SOE) completed

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 completed
• Removal of site utilities completed

Drop Shaft 5 – Between Taylor St. and Cypress St.

• Preparation for support of excavation (SOE)
• Site clearing is completed
• Site utility preparation is completed

Drop Shaft 6 – On Massabesic across from Elliot Hospital

• Drilling and installation of vent shaft
• Preparation for support of excavation (SOE)
• Site utility preparation completed
• Building demolition completed

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)

• Connection of TBM support utilities 
• Connection of slurry plant and muck handling system to the TBM
• Connection of TBM sections and support gantries completed
• Delivery of TBM overland to the site completed
• Delivery of support gantries (gear that follows the TBM into the tunnel) completed
• Fabrication and shipment from Germany of TBM completed
• TBM named by students at Hillside Middle School, refer to News and Publications page