#SELF CLOSING FLOOD BARRIER FOR SUBWAY INSTALL#

Which tank and piping systems must be tested for tightness and how often must they be tested?Ĥ. What NYS law requires tightness testing?ģ. In front of each stairwell would be a grate, which would lead to a reservoir under the stairs rising flood waters would first fall into the reservoir, which would push up the stairway until they were parallel with the street, sealing off the station below.Petroleum Bulk Storage Underground Tank Tightness Testing FAQ'sĢ.

Each stairway would be a solid piece on a hinge at the top. “We try very hard to have everything be passively activated.Īnother idea from FloodBreak, still in development, would apply the same passive-activation approach to the stairwells leading into a subway station. “Any time you depend on people for the process to work, you have a significant chance that it will break down,” he said. “That’s what we’re trying to protect – thousands of those.” The gate doors are hinged, and in the event of a flood, the weight of the incoming water pushes on side down, closing the gate.įor Waters, the key to a successful flood-protection system is to minimize or eliminate human or power requirements, to reduce the possibility of error or malfunction.

“I always tell people to think about that picture of Marilyn Monroe on top of the grate with her skirt blowing up,” he said. The city has already installed dozens of the firm’s grate gates, which sit inside street-level grates that allow fresh air to enter the subways.

Today FloodBreak offers a suite of flood-protection devices for urban transit. “Hurricane Allison turned our city into a lake,” he said, “and I saw the devastation firsthand.” The company’s president, Lou Waters, founded the company in 2002 after his house was inundated by a flash flood. A prototype plug was being installed in an American subway system this year, though Durney said he’s not allowed to say where, citing security reasons.Īnother company developing next-generation flood protection for the New York subways is a Houston-based firm called FloodBreak. ILC is also working with the Transportation Security Administration on a “resilient tunnel plug,” essentially a giant air balloon that is stored in a tunnel and rapidly inflated in the event of a flood or biochemical attack – “Like a giant air bag,” Durney said. “They work like a window shade that you pull horizontally,” Durney said. Stored in an unobtrusive metal case at the top of the entrance, the cover – made of tightly interwoven Kevlar belts and a layer of waterproof fabric – is designed to be unrolled quickly in the event of a flash flood.

#SELF CLOSING FLOOD BARRIER FOR SUBWAY INSTALL#

Last year ILC won a contract to install 25 “flexgates” on stairway entrances to subway stations in the low-lying areas near Canal and Varick Streets in Lower Manhattan, 14 of which have been installed. The New York City subway system sustained over $4 billion worth of damage when Hurricane Sandy made landfall in fall 2012. NYC’s South Ferry Subway Station flooded after Hurricane Sandy “New York City Transit is doing all sorts of amazing stuff,” Douglas Durney, the global marketing director of ILC-Dover, a Delaware-based company that has made a variety of flexible fabric flood closures for the city (as well as the Goodyear blimp and every space suit for NASA since the Apollo project). In fact, while several coastal and low-lying cities around the world are beginning to install flood-protection measures, industry experts uniformly said that New York was setting the pace. New York has already invested millions of dollars in next-generation solutions like retractable stairwell covers and passively automatic doors to close off flooded sections of a tunnel. With the onset of climate-change-driven hurricanes and long-term sea level rise, coastal cities like New York are scrambling to find new technologies to protect their transit systems. Sandy dealt over $4 billion in damage to the city’s subway system, and no one expects it to be the last cataclysmic storm to hit the city. The L Train is one of the city’s most used subway lines, with an estimated 400,000 riders a day, including 225,000 who travel from Brooklyn to Manhattan. On July 25, New York’s Metropolitan Transit Authority announced an 18-month shutdown of the L Train between western Brooklyn and Manhattan, in order to repair a stretch of tunnel under the East River that was damaged during Hurricane Sandy. Image credit: MTA New York City Transit / Marc A.

Self closing flood barrier for subway