Blandford, MA

Cobble Mountain Diversion Gates Outlet Modifications

The Cobble Mountain Diversion Gates Outlet Modifications consists of modifications to the discharge pipes for the Diversion Gate Valves by extending the pipes, adding new air vent pipes, and constructing a new concrete masonry unit (CMU) wall to limit air flow into the tunnel. The Work also includes replacing a damaged security gate at the downstream end of the  tunnel and injecting seeping construction joints in the tunnel to address other icing issues.