Fox Point Hurricane Barrier

Fox Point Hurricane Barrier Gates with Providence River Bridge directly behind
Providence River with Fox Point Hurricane Barrier. The Providence River bridge is just downstream, but not connected to the barrier. The Manchester Street Power Station is on the right.

The Fox Point Hurricane Barrier is a 3,000-foot (910 m) long tidal flood barrier spanning the Providence River in Providence, Rhode Island, located 750 feet (230 m) upstream from Fox Point. It was constructed between 1960 and 1966 to protect the low-lying downtown area of the city from damaging storm surge and floods associated with hurricanes and other major storm events.

The Fox Point Hurricane Barrier consists of five main parts: river gates, rock and earthen dikes along each shore, vehicular gates along each shore where roads pass through the dikes, canal gates at the west end of the barrier associated with the nearby electric power station, and a pumping station to control the flow of water.[1]

Historical background

Since colonial times, the port of Providence, located at the head of Narragansett Bay, has been a vital part of the city's economy. Ocean-going ships regularly dock along the city's waterfront just south of downtown. During the 19th century, the city became a national leader in industrial output and trade. The downtown area is located in a shallow natural basin with an elevation of only 8–12 feet (2.4–3.7 m) above mean sea level.

In September 1938, the Great New England Hurricane slammed the coast of Southern New England, killing 250 people in the region and causing millions of dollars in damage. Downtown Providence, a bustling center of commerce was entirely submerged under water, causing about $120 million in damage in the city alone.

Again in 1954, the area was hit by Hurricane Carol, causing a storm surge as high as 8 feet (2.4 m) in some areas, and resulting in over $41 million in damage.[2]

Local, state and federal officials decided to take action to prevent future devastation. Construction of the barrier was authorized in 1958 under the Flood Control Act.[3]

The $16 million wall has never seen a Category 5 hurricane, but has successfully protected the city in every instance since its construction.[4]

Features

Constructed between 1960 and 1966 at a cost of $14 million, the barrier was the first of its type to be approved for construction in the United States.[5]

River gates

The main feature of the hurricane barrier is a group of three large movable gates which span the river, allowing boats to pass through during normal periods. Each of the three Tainter gates is 40 feet (12 m) wide and weighs 53 tons with a curved outer portion facing the tide. It takes about 30 minutes to lower each gate.[6] The relatively narrow gates prohibit large ships from passing into the inner downtown harbor as they did in the 19th century. However, modern ocean-going vessels now dock at the Port of Providence, located south of the barrier. The inner harbor is now generally occupied by only small pleasure craft during the summer months.

Dikes

The majority of the hurricane barrier's length consists of a 25-foot (7.6 m) high rock and earthen dike along the low-lying areas of the waterfront within the Fox Point and Jewelry District neighborhoods of Providence. The original dike located along the eastern shore has been removed and replaced with vertical concrete walls as part of the construction of the new embankment for the Interstate 195 relocation.

Vehicular gates

Three sets of huge steel vehicular gates are located under the newly constructed portion of Interstate 195, east of the Providence River Bridge, at South Water, South Main and at Benefit Street. On the west shore, vehicular gates are located at Allens Avenue as well as on the property of the Manchester Street Power Plant. The gates are normally in the "open" position to allow traffic to pass through, but are closed to provide a continuous barrier during emergency events.

Canal gates

On the west side of the river, there are also two large canal gates, which control water used to cool the nearby Manchester Street Power Station, which is operated by Dominion Resources.[7]

Pumping station

The barrier also includes a pumping station, housed within a concrete and brick structure located near the western shore of the river. The pumping station contains five 4500 H.P. pumps with instantaneous starting power, and are designed to convey water from the Providence River over the barrier when the gates are closed. (Otherwise, the continuously flowing river water would have no place to go).

Each pump is about 54.7-foot (16.7 m) high and 20-foot (6.1 m) in diameter, and together they can pump 3.1 million gallons (11,735 cubic meters) per minute.[5]

Gauges inside the pumping station measure the water level inside and outside the barrier, and control the pumps, in order to maintain the water levels on either side as closely as possible.

Usage in protecting Providence

The gate was closed during a gale on Jan. 10, 1978 preventing two feet of water from flooding downtown Providence.[8]

In 1985, the Fox Point Hurricane Barrier was utilized, sparing downtown Providence from being inundated in two feet of water from storm surge brought by Hurricane Gloria, keeping the city dry. In 1991, the Barrier spared the city from Hurricane Bob, which would have covered downtown in four feet of water. The savings has been estimated at several hundred million dollars and the project operates at a cost-benefit ratio of 2.21 to 1.[9][10]

A $3 million overhaul of the barrier's five massive pumps was completed in 2006.[7]

It is believed by witnesses, during a storm on April 18, 2007, flow from the pumps from the hurricane barrier contributed to the sinking of the Soviet submarine K-77 which was then being used as a museum.[11]

The barrier was closed on August 28, 2011 in preparation for Hurricane Irene.

The barrier is also used to keep the river level higher during low tides, for the benefit of WaterFire events.

The barrier was closed on October 29, 2012 due to Hurricane Sandy. The water crested at 9.5 feet, the fifth highest crest on record.[12] The flood stage is 7 feet.[13]

References

  1. ↑ Fox Point Hurricane Barrier
  2. ↑ Significance of the Fox Point Hurricane Barrier
  3. ↑ Josh Chalchinsky, 2006
  4. ↑ "Providence Hurricane Barriers Eyed - Boston News Story - WCVB Boston". Retrieved 2008-09-12.
  5. 1 2 Providence DPW website
  6. ↑ Description of River Gates
  7. 1 2 Providence Journal article, July 16, 2006
  8. ↑ "Hurricane gate credited with saving Providence". Bangor Daily News. UPI. Jan 10, 1978. p. 3. Retrieved 30 October 2012.
  9. ↑ "Fox Point Hurricane Barrier: Significance Page Six". Retrieved 2008-09-12.
  10. ↑ Barron, James (1991-08-20). "THE EAST COAST STORM; Hurricane Sideswipes East Coast, Leaving Damage and Two Deaths - New York Times". The New York Times. Retrieved 2008-09-12.
  11. ↑ "Juliett 484 News - WHAT HAPPPENED? [sic]". Archived from the original on July 18, 2011. Retrieved 2012-09-17.
  12. ↑ "Hurricane barrier in Providence gets high marks". Boston Globe. AP. October 30, 2012. Archived from the original on November 9, 2012. Retrieved October 30, 2012.
  13. ↑ "Narragansett Bay at Fox Point". Advanced Hydrologic Prediction Service. National Weather Service. Retrieved October 30, 2012.

External links

Coordinates: 41°48′58″N 71°24′05″W / 41.81601°N 71.40149°W / 41.81601; -71.40149

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