MEMORANDUM TO: FR: RE: DA: Richard A. Davey, Secretary & CEO Frank DePaola, Highway Division Administrator Ongoing Work in the MHS Tunnels June 20, 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 Callahan Tunnel overnight to allow electricians to relamp the light poles at the tunnel entrance. The work required a full closure because workers needed a bucket truck and steadying booms. 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. Workers for the contractor also closed a lane during the day so that the contractor and MCCA officials could review the progress of the work. 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 replaced two power supplies in a Variable Message Sign board in the I-93 Northbound Tunnel near Exit 23 (Government Center).