MEMORANDUM TO: FR: RE: DA: Richard A. Davey, Secretary & CEO Frank DePaola, Highway Division Administrator Ongoing Work in the MHS Tunnels June 13, 2014 To follow is a summary of maintenance and construction activities performed last week in the Metropolitan Highway System Tunnels. Overnight work: • • • • • • • • • • • MassDOT closed the O’Neill Tunnel Northbound overnight to allow cleaning and maintenance work in areas of the tunnel not normally accessible when traffic is flowing. Contractors are repairing water infiltration at multiple points within the O’Neill Tunnel (both directions) and on related ramps. Water infiltration repair work is also underway in the I-90 Connector Tunnel (both directions) and the Ted Williams Tunnel Eastbound. A contractor working on behalf of the Massachusetts Convention Center Authority is performing ongoing ceiling-related construction in the Prudential Tunnel. The contractor is also installing new fireproofing materials. The contractor continues to repair the walls and remove supplemental steel and concrete, which requires periodic lane closures. A contractor working on behalf of the owner of the Prudential Center continued work on the ceiling of the Prudential Tunnel Westbound. This is a different section of the ceiling than what has been noted above. MassDOT continued the Callahan Tunnel rehabilitation with repairs to the tunnel wall and installation of the wall panel support system. The tunnel re-opened in March; rehabilitation work continues with periodic lane closures as needed. A contractor performed a routine inspection of portions of the I-93 Southbound Tunnel and related ramps. A contractor also performed a similar inspection on the Northbound side. A contractor is also inspecting the I-90 Connector Tunnel (both directions) the HOV Tunnel, and the Eastbound tunnel set. A contractor continued repairs to the roadway wearing surface near the entry portal of the Ted Williams Tunnel Westbound. MassDOT workers continued their work charging the standpipes in the Sumner Tunnel. This weather-dependent activity allows for faster responses in the event of a tunnel fire. MassDOT workers troubleshot an issue with an overhead door in a fan room in the Prudential Tunnel Westbound. Workers also did preventative maintenance on equipment within the fan room. MassDOT workers performed miscellaneous lighting maintenance near Ramps CN-S (Exit 26, I-93 Northbound) and ST-S (Sumner Tunnel to Storrow Drive).