Passaic River Flood Tunnel

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The Passaic River Flood Tunnel is a proposal for a flood relief tunnel from the central portion of the Passaic River basin in Passaic County, New Jersey in an area where a number of large tributary rivers join the Passaic River and severe flooding occasionally occurs. The tunnel would provide relief to an area that experiences severe flooding events which cause tens of millions in property damage and disruption to lives. The tunnel would stretch from the Wayne, New Jersey area to Newark Bay, a distance of approximately twenty miles.

Tunnel An underground passage made for traffic

A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.

Passaic River river in New Jersey, United States

The Passaic River is a river, approximately 80 mi (129 km) long, in northern New Jersey in the United States. The river in its upper course flows in a highly circuitous route, meandering through the swamp lowlands between the ridge hills of rural and suburban northern New Jersey, called the Great Swamp, draining much of the northern portion of the state through its tributaries. In its lower portion, it flows through the most urbanized and industrialized areas of the state, including along downtown Newark. The lower river suffered from severe pollution and industrial abandonment in the 20th century. In April 2014, the U.S. Environmental Protection Agency announced a $1.7 billion plan to remove 4.3 million cubic yards of toxic mud from the bottom of lower eight miles of the river. It is considered one of the most polluted stretches of water in the nation and the project one of the largest clean-ups ever undertaken.

Passaic County, New Jersey County in the United States

Passaic County is a county in the U.S. state of New Jersey that is part of the New York metropolitan area.

Contents

The course, watershed, and tributaries of the Passaic and area of prehistoric Lake Passaic, where flooding occurs regularly Passaicwatershedmap.png
The course, watershed, and tributaries of the Passaic and area of prehistoric Lake Passaic, where flooding occurs regularly

Origin of tunnel

The Passaic River Flood Tunnel idea has its origins in the federally appointed Flood District Commission that existed from 1902 through 1936, and was assigned the task of formulating plans to alleviate persistent flooding in the Passaic River Basin.

Proposed tunnel plan

After several failed proposals over the decades, the modern vision of the Passaic River Flood Tunnel took shape in the mid 1980s as the State of New Jersey selected a modified Army Corps of Engineers preferred alternative: The Pompton/Passaic Dual Inlet Tunnel Diversion Plan. The major elements of the proposed project were a 40-foot-diameter (12 m), 20.1-mile-long (32.3 km) tunnel and a 22-foot-diameter (6.7 m), 1.2-mile-long (1.9 km) spur tunnel, two inlets, one outlet, at least four workshafts along the tunnel pathway, "natural" storage areas, channel modifications, ponding areas, levees, and flood walls. The outlet of the tunnel would be located in Newark Bay, 1,500 feet south of Kearny Point.

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.

Newark Bay Estuary on the coast of New Jersey, United States

Newark Bay is a tidal bay at the confluence of the Passaic and Hackensack Rivers in northeastern New Jersey. It is home to the Port Newark-Elizabeth Marine Terminal, the largest container shipping facility in Port of New York and New Jersey, the third largest and one of the busiest in the United States. An estuary, it is periodically dredged to accommodate ocean-going ships.

South Kearny, New Jersey human settlement in New Jersey, United States of America

South Kearny is an industrial district and distinct area of Hudson County, New Jersey at the northern end of Newark Bay in the town of Kearny, New Jersey. It is on the larger peninsula once called New Barbadoes Neck, which also include the other Kearny districts of the Uplands and the Kearny Meadows. It has been known as Kearny Point and, along Droyer's Point in Jersey City, marks the mouth of the Hackensack River to the east. The Passaic River flows along its western border opposite a similarly industrial portion of the Ironbound district of Newark. Most of the point is part of Foreign-Trade Zone 49

The 20.1-mile-long (32.3 km) main tunnel would carry flood waters from the primary inlet at the confluence of the Pequannock, Wanaque, Ramapo, and Pompton Rivers just above the junction with the Passaic River; an area that is most prone to severe flooding in the Passaic River basin. A 1.2-mile-long (1.9 km) spur would carry floodwaters from an inlet along the Passaic River, downstream from Two Bridges, to a connection with the main tunnel beneath the borough of Totowa, New Jersey. A Floodwarning and Forecasting System would be pressed into service to establish operating signals for the tunnel. Most of the major channel modifications would be built near the two tunnel inlets. The modifications would modify several portions of the Passaic, Pompton, Ramapo, Wanaque, and Pequannock Rivers. There are also two interim projects that would be constructed prior to the construction of the flood tunnel. These two projects include major stream alterations, including channelization to the Saddle River and Ramapo River. The cost estimate for the tunnel in the late 1990s was $1.8 billion.

Pompton River river in the United States of America

The Pompton River is a tributary of the Passaic River, approximately 8 mi (13 km) long, in northern New Jersey in the United States.

Totowa, New Jersey Borough in New Jersey, United States

Totowa is a borough in Passaic County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 10,844, reflecting an increase of 912 (+9.2%) from the 9,892 counted in the 2000 Census, which had in turn declined by 285 (-2.8%) from the 10,177 counted in the 1990 Census.

Pequannock River river in the United States of America

The Pequannock River is a tributary of the Pompton River, approximately 20 miles (32 km) long, located in northern New Jersey in the United States.

Current status

The State and Federal governments prefer to buy out properties in the Passaic River Basin that are prone to flooding, rather than embarking on a large-scale engineering and construction project such as the proposed flood-control.

Source: Passaic River Info

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Lake Passaic was a prehistoric proglacial lake that existed in northern New Jersey in the United States at the end of the last ice age approximately 19,000-14,000 years ago. The lake was formed of waters released by the retreating Wisconsin Glacier, which had pushed large quantities of earth and rock ahead of its advance, blocking the previous natural drainage of the ancestral Passaic River through a gap in the central Watchung Mountains. The lake persisted for several thousand years as melting ice and eroding moraine dams slowly drained the former lake basin. The effect of the lake’s creation permanently altered the course of the Passaic River, forcing it to take a circuitous route through the northern Watchung Mountains before spilling out into the lower piedmont.

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Pompton Lake

Pompton Lake is a 175-acre man-made lake on the Ramapo River which is located within the towns of Pompton Lakes and Wayne in Passaic County, New Jersey. The lake was formed by the construction of the Pompton Lake Dam in 1908 after a prior wooden dam was destroyed by a flood in 1903. The waters impounded in the lake serve as a supplemental drinking source. It is primarily fed by the Ramapo River, but also receives inflow from Acid Brook and smaller tributaries. The Ramapo River continues downstream of Pompton Lake Dam, flowing into the Pompton River and ultimately the Passaic River. The area of the Pompton Lake watershed is 176 square miles. The estate of the author Albert Payson Terhune, Sunnybank, is on the Wayne shore of the lake.

The Passaic River Coalition (PRC) is an organization based out of Willow Hall in Morristown, New Jersey. The coalition is an urban watershed association active since 1969 in protecting water quality and quantity of the entire Passaic River watershed of northern New Jersey and Rockland and Orange Counties, New York.