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MTA New York City Transit (NYCT) recently awarded a $49.8 million contract to Granite Construction Inc. subsidiary Granite Halmar to construct two underground vent plant structures in midtown Manhattan.

The project includes installing ventilation units, and enhancing vibration and noise control systems. Granite Halmar also will relocate utilities and remove more than 6,000 cubic yards of bedrock.

Designed to circulate fresh air, vent plants enable NYCT to direct smoke away from the traveling public in the event of a tunnel fire, according to a prepared statement. The new underground structures will feature reinforced concrete with structured steel framing.

The project is scheduled to begin in February 2005 and be complete in August 2008.