MWRA Reaches Next Milestone on the MetroWest Water Supply Tunnel
Holing Through
Tunnel Boring Machine hits the mark on October 27th and "holes through" final tunnel segment under Mass Pike - Route 128 interchange. This marks the completion of all 17.6 miles of mining on the project.

Cutters
Cutters on 16' diameter Tunnel Boring Machine rotate as the final few feet of rock are cleared away.

Inside the Tunnel 
17.6 miles of tracks, power cables, air vents, water and rock conveyors.

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Go to: MWRA Front Page
MetroWest Water Supply Tunnel
MWRA Reaches Next Milestone on the MetroWest Water Supply