Green Brook Flood Control Project

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The Green Brook Flood Control Project is a flood control project in Somerset County in central New Jersey first proposed in the early 1970s in the wake of two major flooding events: a 1971 flood event and a major 1973 flood which ravaged the Green Brook and Raritan River basins, causing millions in property damage and several deaths in central New Jersey.

Somerset County, New Jersey County in the United States

Somerset County is a county located in the U.S. state of New Jersey. As of the 2017 Census estimate, the county's population was 335,432, a 3.7% increase from the 2010 United States Census, making it the 13th most populous of the state's 21 counties. Somerset County is part of the New York Metropolitan Area. Its county seat is Somerville. The most populous place was Franklin Township, with 62,300 residents at the time of the 2010 Census, while Hillsborough Township, covered 55.00 square miles (142.4 km2), the largest total area of any municipality.

New Jersey State of the United States of America

New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is located on a peninsula, bordered on the north and east by the state of New York, particularly along the extent of the length of New York City on its western edge; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware River and Pennsylvania; and on the southwest by the Delaware Bay and Delaware. New Jersey is the fourth-smallest state by area but the 11th-most populous, with 9 million residents as of 2017, and the most densely populated of the 50 U.S. states; its biggest city is Newark. New Jersey lies completely within the combined statistical areas of New York City and Philadelphia. New Jersey was the second-wealthiest U.S. state by median household income as of 2017.

Green Brook is a tributary of the Raritan River in central New Jersey in the United States.

Contents

The proposed flood control measures in Bound Brook, New Jersey BB Flood Control.jpg
The proposed flood control measures in Bound Brook, New Jersey

The worst flooding in the Green Brook basin occurs in Bound Brook, which partially lies on a natural flood plain of the Raritan River at the junction of the Green Brook and Raritan River.

Bound Brook, New Jersey Borough in New Jersey

Bound Brook is a borough in Somerset County, New Jersey, United States, located along the Raritan River. At the 2010 United States Census, the borough's population was 10,402, reflecting an increase of 247 (+2.4%) from the 10,155 counted in the 2000 Census, which had in turn increased by 668 (+7.0%) from the 9,487 counted in the 1990 Census.

To address this flooding problem, the United States Army Corps of Engineers has proposed the Green Brook Sub Basin Flood Control Project, which entails numerous flood walls, levees, channel diversions, widening projects and retention basins throughout the Green Brook basin. [1]

United States Army Corps of Engineers federal agency under the Department of Defense and a major Army command

The United States Army Corps of Engineers (USACE) is a U.S. federal agency under the Department of Defense and a major Army command made up of some 37,000 civilian and military personnel, making it one of the world's largest public engineering, design, and construction management agencies. Although generally associated with dams, canals and flood protection in the United States, USACE is involved in a wide range of public works throughout the world. The Corps of Engineers provides outdoor recreation opportunities to the public, and provides 24% of U.S. hydropower capacity.

Flood wall mostly vertical artificial barrier to temporarily contain the waters of a waterway which may flood

A flood wall is a primarily vertical artificial barrier designed to temporarily contain the waters of a river or other waterway which may rise to unusual levels during seasonal or extreme weather events. Flood walls are mainly used on locations where space is scarce, such as cities or where building levees or dikes (dykes) would interfere with other interests, such as existing buildings, historical architecture or commercial use of embankments.

Levee Ridge or wall to hold back water

A levee, dike, dyke, embankment, floodbank or stopbank is an elongated naturally occurring ridge or artificially constructed fill or wall, which regulates water levels. It is usually earthen and often parallel to the course of a river in its floodplain or along low-lying coastlines.

Floodings during the project

The Green Brook Flood Control project has languished for decades due to a lack of federal funding. Hurricane Floyd in 1999 caused yet more property damage and deaths in the Green Brook basin, especially in Bound Brook, and reinvigorated the flood control project. As of 2006, two levees have been built on the western and eastern sides of Bound Brook. An important levee (R2) on the southwestern side of Bound Brook, which would prevent the Raritan River from flooding the downtown and nearby residential areas, has been completed. Full 150 year protection of downtown and nearby residential areas of Bound Brook is effectively in place with final construction due to be completed by the summer of 2014.

Hurricane Floyd Category 4 Atlantic hurricane in 1999

Hurricane Floyd was a very powerful Cape Verde hurricane which struck the east coast of the United States. It was the sixth named storm, fourth hurricane, and third major hurricane in the 1999 Atlantic hurricane season. Floyd triggered the fourth largest evacuation in US history when 2.6 million coastal residents of five states were ordered from their homes as it approached. The hurricane formed off the coast of Africa and lasted from September 7 to September 19, peaking in strength as a very strong Category 4 hurricane—just 2 mph short of the highest possible rating on the Saffir–Simpson Hurricane Scale. It was among the largest Atlantic hurricanes of its strength ever recorded.

Downtown Bound Brook, New Jersey, April 16, 2007 Boundbrook041607.jpg
Downtown Bound Brook, New Jersey, April 16, 2007

The April Nor'easter of 2007 flooded Bound Brook with the second highest crest ever recorded in the area, as the envisioned flood protection systems were not yet fully in place. However, the April 2007 flooding did reinvigorate efforts to complete the flood levee protection system around Bound Brook, to protect it from future flooding.

Flooding of downtown occurred in August 2011 when Hurricane Irene passed along the East Coast. [2]

Hurricane Irene Category 3 Atlantic hurricane in 2011

Hurricane Irene was a large and destructive tropical cyclone which affected much of the Caribbean and East Coast of the United States during late August 2011. The ninth named storm, first hurricane, and first major hurricane of the 2011 Atlantic hurricane season, Irene originated from a well-defined Atlantic tropical wave that began showing signs of organization east of the Lesser Antilles. Due to development of atmospheric convection and a closed center of circulation, the system was designated as Tropical Storm Irene on August 20, 2011. After intensifying, Irene made landfall in St. Croix as a strong tropical storm later that day. Early on August 21, the storm made a second landfall in Puerto Rico. While crossing the island, Irene strengthened into a Category 1 hurricane. The storm paralleled offshore of Hispaniola, continuing to slowly intensify in the process. Shortly before making four landfalls in the Bahamas, Irene peaked as a 120 mph (190 km/h) Category 3 hurricane.

Current status

  1. The R2 levee system is functionally complete – The R2 Levee System is designed to provide Bound Brook with protection from a 150-year flood level. The levee is built to the height of the raised Talmage Avenue Bridge.
  2. Closure gates along Raritan are functionally complete – The gate closures across the New Jersey Transit railroad tracks on the western side of Bound Brook and at the South Main Street railroad underpass that leads to Queens Bridge have been completed and are used to keep flood waters out of Bound Brook.
  3. The new Talmadge Avenue Bridge that connects Bound Brook and Bridgewater, New Jersey is functionally complete. The replacement bridge was built to the height of the R2 Levee to prevent Middle Brook and Raritan River waters from entering Bound Brook from the west.
  4. To improve water flow through Bound Brook, the former Conrail bridge over the Raritan River and its associated railroad embankment that were located east of Bound Brook were removed during 2007. The bridge and embankment, when they were in place, acted to block the river flow through the Bound Brook area. To build the main Bound Brook R2 levee, the bridge and embankment needed to be removed. [3]

Finderne Wetlands mitigation project

The Finderne Wetlands mitigation project [4] (also known as Finderne Farms) is a wetlands project upstream of Bound Brook in Bridgewater, New Jersey that is tied into the Green Brook Flood Control project. When completed, Finderne Farms will serve as a Somerset County park with trails through wetlands and ballfields. More importantly, Finderne Farms will serve as an upstream wetland that will help to reduce flooding in the Raritan River valley by providing space for floodwaters to pool.

A roadway bridge called the Sebrings Bridge, which crosses the Green Brook and links the towns of Green Brook and Middlesex, is in the process of being replaced, as part of the Green Brook Flood Control project. The bridge currently slows water flow in the Green Brook during periods of high water runoff and causes flooding in the areas upstream of the bridge. The new bridge will be widened and raised to ease water flow. Federal funding is in place for Fiscal Year 2014 for the bridge replacement. Replacement of the bridge also will allow for additional future flood mitigation measures in the areas adjacent to the bridge, such as additional flood walls and levees.

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References

  1. ↑ US Army Corps of Engineers New York District: GREEN BROOK SUB BASIN, NJ Archived 2003-08-20 at the Wayback Machine ., accessed May 10, 2006.
  2. ↑ Eugene Paik (August 29, 2011). "Flood waters cover Bound Brook as smell of oil is in the air" . Retrieved August 31, 2011.
  3. ↑ February Meeting Minutes [ permanent dead link ]
  4. ↑ Finderne Wetlands Mitigation Project
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