Rail

MTA wraps Grand Central Terminal blasting

Posted on April 10, 2013

Sandhogs working on the New York Metropolitan Transportation Authority’s (MTA) East Side Access megaproject have concluded major blasting under Grand Central Terminal, where they are building two enormous caverns 160 feet below street level that will house eight tracks for Long Island Rail Road (LIRR) trains.

Since March 7, 2007, nearly 1,000 employees working 24 hours a day, five days a week, have completed more than 2,400 controlled blasts — all without affecting the nearby operations of MTA Metro-North Railroad or the New York City Subway.

Approximately 857,000 cubic yards of rocky muck were excavated and removed, enough to cover the entirety of Central Park one foot deep.

“This is a very significant milestone for the East Side Access project,” said Dr. Michael Horodniceanu, president, MTA capital construction. “The caverns are essentially now fully excavated. Much work remains to be done to build the platforms and tracks and finish what is currently raw, cave-like space. But we now have a fully built shell in which all future work will take place.”

Each blast was overseen by an FDNY-licensed blaster. To conduct a blast, teams of sandhogs drill hundreds of holes measuring 1½ inches in diameter into the mica-inflected granite schist that forms the bedrock of Midtown Manhattan. Together, the holes are loaded with 200 pounds to 500 pounds of an explosive powder known as Emulex. After the sandhogs clear into a safe area, the Blaster-in-Charge issues a warning — “fire in the hole!” — and triggers the blast.

The contractors, a joint venture of Dragados USA Inc., and Judlau Contracting Inc., are continuing to perform miscellaneous concrete work until their contract is complete in June. They expect that they may need to make additional small blasts that will trim out pieces of rock in the cavern.

In addition to the blasting, the caverns under Grand Central have been excavated in part by two monstrous 200-ton tunnel boring machines that operated from September 2007 until June 2011, chewing through a total of more than 32,000 linear feet of Manhattan bedrock from 63rd Street to 37th Street.

 

View comments or post a comment on this story. (0 Comments)

More News

Metra looks to purchase 21 used locomotives

The F59PHIs, which were built by the Electro-Motive Division of GM in 1998 and have been rehabbed within the last five years, have similar parts and operating characteristics to Metra’s existing fleet of EMD F40s, some of which are 35 years old and are in need of overhaul.

Sound Transit taps Siemens traction power tech for light rail expansion

The new project extends Siemens existing technology partnership with Sound Transit, having previously provided the same TPSS and MVSS substation infrastructure on the University Link and South Link lines.

MTA names new president of Metro-North Railroad

Catherine Rinaldi, the sixth president of MTA Metro-North Railroad, has served as acting president since July 2017.

Bombardier to provide 9 more double-deck French trains

The order is valued at approximately $120 million, including price escalations based on best faith assessment of assumptions, and is an option contained in a 2010 contract for a maximum of 860 trains signed with SNCF on behalf of the regions.

FRA makes $73M available for rail capital projects, ops assistance

The grants are expected to leverage private, state, and local investments to boost a wide range of rail projects, including the potential for implementing PTC.

See More News

Post a Comment

Post Comment

Comments (0)

More From The World's Largest Fleet Publisher

Automotive Fleet

The Car and truck fleet and leasing management magazine

Business Fleet

managing 10-50 company vehicles

Fleet Financials

Executive vehicle management

Government Fleet

managing public sector vehicles & equipment

TruckingInfo.com

THE COMMERCIAL TRUCK INDUSTRY’S MOST IN-DEPTH INFORMATION SOURCE

Work Truck Magazine

The number 1 resource for vocational truck fleets

Schoolbus Fleet

Serving school transportation professionals in the U.S. and Canada

LCT Magazine

Luxury Coach & Transportation

Please sign in or register to .    Close