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Video: Dewatering the Brooklyn Battery Tunnel

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A diverse partnership of government, military and private industry professionals have joined forces to remove floodwater caused by Hurricane Sandy's record-level storm surge from the Brooklyn Battery Tunnel, which connects Brooklyn with the island of Manhattan. The Federal Emergency Management Agency (FEMA) is overseeing the unified federal response. At 9,117 feet the Brooklyn Battery Tunnel is the longest continuous underwater vehicular tunnel in North America. The U.S. Army Corps of Engineers (USACE) dewatering team, based in Rock Island, Ill., is working closely with the Metropolitan Transit Authority (MTA) to get this vital transportation conduit back in service. The U.S. Coast Guard, U.S. Navy and private contractors are all contributing innovative solutions to speed the effort. Initial efforts focused on pumping water from the Brooklyn end of the tunnel and from Governors Island, where a large ventilation shaft, which exists to remove vehicle exhaust fumes, provides a unique angle from which to drain the tunnel. Working from the Brooklyn side, MTA commercial contractor Restani Construction Corp., pumped water from that side into an intermediate sump area. The U.S. Coast Guard then pumped the water from the intermediate sump to the surface at the Brooklyn tunnel entrance. As water levels have dropped, engineers have repositioned the pumping equipment and extended discharge pipes to follow the receding water level lower and lower into the tunnel approximately 150' below the surface and totaling nearly half the distance of the tunnel with discharge piping. At Governors Island, the U.S. Coast Guard brought specialized maritime dewatering technology to speed the effort. Coast Guardsmen used submersible hydraulic pumps normally used aboard ship to remove water from flooded compartments, and lowered them down the ventilation shafts to remove water from the lowest part of the tunnel. Restani also installed submersible electric pumps through the ventilation shafts. The pumps, attached to 6-inch diameter hoses, drew water the 150 foot vertical distance to the surface. On the Manhattan side, commercial contractor Donjon Marine Co., Inc., working under an existing U.S. Navy contract, began pumping at the Manhattan Cellular Structure Plaza. The cellular structure is a sump at the entrance to the tunnel designed to collect stormwater and prevent it from entering the tunnel. The first priority has been to remove water from the roadway section of the tunnel, then from ventilation sections of the same tunnel. "Everyone has done an excellent job," said USACE dewatering team engineer John Behrens. "I'm especially pleased with the work the Coast Guard has done. They came prepared to execute and have done a great job. The MTA and commercial contractors have all done a truly professional job bringing great ideas and hard work to the effort." At its peak the combined effort removed about 11,000 gallons of water from the tunnel each minute. Initial estimates were that as much as 86 million gallons of water had flooded the tunnel. The Coast Guardsmen have completed the majority of their portion of the pumping effort. "The U.S. Coast Guard National Strike Force is proud to be part of the combined effort that is working day and night to help the people of New York restore their transportation infrastructure," Coast Guard on scene commander Lt. Joel Ferguson said. Link to related b-roll: http://www.dvidshub.net/video/160332/brooklyn-battery-tunnel-work-continues


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Public Domain Mark
This work, Dewatering the Brooklyn Battery Tunnel, by Mary Cochran, identified by DVIDS, is free of known copyright restrictions under U.S. copyright law.

Date Taken:11.12.2012

Date Posted:11.12.2012 9:38AM

Category:Package

Video ID:176340

VIRIN:121112-A-#####-843

Filename:DOD_100629479

Length:00:01:06

Location:NEW YORK, US

More Like This

  • BROOKLYN, New York -- A diverse partnership of government, military and private industry professionals have joined forces to remove floodwater caused by Hurricane Sandy's record-level storm surge from the Brooklyn Battery Tunnel, which connects Brooklyn with the island of Manhattan. The Federal Emergency Management Agency (FEMA) is overseeing the unified federal response.

At 9,117 feet the Brooklyn Battery Tunnel is the longest continuous underwater vehicular tunnel in North America. The U.S. Army Corps of Engineers (USACE) dewatering team, based in Rock Island, Ill., is working closely with the Metropolitan Transit Authority (MTA) to get this vital transportation conduit back in service. The U.S. Coast Guard, U.S. Navy and private contractors are all contributing innovative solutions to speed the effort.

Initial efforts focused on pumping water from the Brooklyn end of the tunnel and from Governors Island, where a large ventilation shaft, which exists to remove vehicle exhaust fumes, provides a unique angle from which to drain the tunnel.

Working from the Brooklyn side, MTA commercial contractor Restani Construction Corp., pumped water from that side into an intermediate sump area. The U.S. Coast Guard then pumped the water from the intermediate sump to the surface at the Brooklyn tunnel entrance. As water levels have dropped, engineers have repositioned the pumping equipment and extended discharge pipes to follow the receding water level lower and lower into the tunnel approximately 150' below the surface and totaling nearly half the distance of the tunnel with discharge piping.

At Governors Island, the U.S. Coast Guard brought specialized maritime dewatering technology to speed the effort. Coast Guardsmen used submersible hydraulic pumps normally used aboard ship to remove water from flooded compartments, and lowered them down the ventilation shafts to remove water from the lowest part of the tunnel. Restani also installed submersible electric pumps through the ventilation shafts. The pumps, attached to 6-inch diameter hoses, drew water the 150 foot vertical distance to the surface.

On the Manhattan side, commercial contractor Donjon Marine Co., Inc., working under an existing U.S. Navy contract, began pumping at the Manhattan Cellular Structure Plaza. The cellular structure is a sump at the entrance to the tunnel designed to collect stormwater and prevent it from entering the tunnel.

The first priority has been to remove water from the roadway section of the tunnel, then from ventilation sections of the same tunnel.

"Everyone has done an excellent job," said USACE dewatering team engineer John Behrens. "I'm especially pleased with the work the Coast Guard has done. They came prepared to execute and have done a great job. The MTA and commercial contractors have all done a truly professional job bringing great ideas and hard work to the effort."

At its peak the combined effort removed about 11,000 gallons of water from the tunnel each minute. Initial estimates were that as much as 86 million gallons of water had flooded the tunnel. The Coast Guardsmen have completed the majority of their portion of the pumping effort.

"The U.S. Coast Guard National Strike Force is proud to be part of the combined effort that is working day and night to help the people of New York restore their transportation infrastructure," Coast Guard on scene commander Lt. Joel Ferguson said. Available in high definition.
  • U.S. Army Corps of Engineers Mark Gonski, of the New Orleans District, inspects the dewatering operations at the New York City's South Ferry Line Station.  In response to Hurricane Sandy, the U.S. Army Corps of Engineers led Joint Dewatering Task Force is executing pumping operations with state and federal partners at six flooded mass transit sites in response to FEMA's $20 million mission assignment.  The Joint Dewatering Task Force is concentrating its pumping efforts at the following locations: Battery Park Exchange, Brooklyn Battery Tunnel, Queens Midtown Tunnel, Rockaway Wastewater Treatment Plant, Passaic Valley Waste Water Treatment Plant, World Trade Center, 14th Street Tunnel-Canarsie (L Subway), and the Montague Street Tunnel (N, R Subway). Available in high definition.
  • Soldiers from the 249th Prime Power Battalion perform a site inspection with employees from the U.S. Army Corps of Engineers to determine the best way to connect generator power to the Brooklyn Battery Tunnel ventilation tower. Coast Guard sailors hook up additional pumps to assist in dewatering the tunnel as well. The Corps is concentrating effort at 11 critical locations in NY as determined by local officials. The sites include Battery Underpass/West St. Underpass, Brooklyn Battery Tunnel, Queens Midtown Tunnel, Rockaway Wastewater Treatment Plant, Passaic Valley Sewage, South Ferry Station, Jersey City PATH train station, World Trade Center site, 14th St. Tunnel, 53rd St. Tunnel and Montague Street Tunnel. Pumping is underway at all locations at a rate of 116,000 gallons of water per minute. Also available in high definition.



Read more: http://www.dvidshub.net/video/160332/brooklyn-battery-tunnel-work-continues#ixzz2BZEqyL4w
  • Through a partnership of private industry professionals and city and federal agencies, flood waters from nine FEMA mission-assigned locations in New York City have been removed less than two weeks after Hurricane Sandy's record-level storm surge inundated the area. Dewatering operations at four of five other FEMA mission-assigned locations in the New York City metro area have also completed.
At the 14th and final FEMA dewatering mission assignment, the Passaic Valley Wastewater Treatment Plant in Newark, N.J., the task force is still actively pumping out the final areas of the facility, which was estimated to have been flooded with more than 200 million gallons of saltwater. The U.S. Army Corps of Engineers (USACE) Philadelphia District is assisting in the completion of this mission.
The dewatering task force, led by USACE and including the Metropolitan Transit Authority, the New York City Department of Transportation, the Port Authority of New York and New Jersey, and Con Edison, concluded its mission in the city Nov. 10 with more than 270 million gallons of saltwater removed from tunnels, underpasses, and other areas in the New York City metro area.
In total, the FEMA-assigned joint dewatering mission will have drained over 470 million gallons of water from the metro area, enough to fill all 843 acres of Central Park with roughly two feet of water.
The task force provided technical assistance and dewatering to complete their FEMA mission at the following locations: Brooklyn Battery Tunnel (est. 86 million gallons), World Trade Center / PATH Train (est. 20 million gallons), South Ferry Subway Station (est. 20 million gallons), 14th Street Tunnel-Canarsie (est. 3.5 million gallons), the Battery Park Exchange (est. 57 million gallons), the Montague Tunnel (est. 60 million gallons), and the Amtrak Substation Kearny (est. 40 million gallons).
The New York Metropolitan Transit Authority completed dewatering operations at Queens Midtown Tunnel (est. 2 million gallons) and the 53rd Street Tunnel (est. 2 million gallons); the New York Department of Transportation completed dewatering at the Metropolitan Avenue Bridge; the New York Dept. of Environmental Protection completed dewatering at the Rockaway Wastewater Treatment Plant; and Con Edison completed dewatering at the Manhattan Steam Plant Tunnel. Also available in high definition

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