Question: The Ford Motor Company Edgewater Assembly Plant was located in the city along which river in New Jersey?

Context paragraphs:
Ford Motor Company - Columbus Assembly Plant: The Ford Motor Company - Columbus Assembly Plant was located at 427 Cleveland Avenue, Columbus, Ohio.  As a branch assembly plant of the Ford Motor Company, beginning in 1914 it assembled the Ford Model T. automobile.

Michigan Assembly Plant: Michigan Assembly Plant, formerly known as "Michigan Truck Plant", is a Ford Motor Company assembly plant in Wayne, Michigan.  The plant employs 1,200 (September 2008), comprises three main buildings with 2900000 sqft of factory floor space and is located adjacent to Wayne Stamping & Assembly.  The plant was built in 1957 and has seen many expansions and upgrades.  The plant began manufacturing the third generation, North American Ford Focus on December 14, 2010.

Ford Kansas City Assembly Plant: Ford Motor Company's Kansas City Assembly plant in Claycomo, Missouri is a Ford Motor Company assembly plant located at 8121 US-69, Kansas City, MO.  The plant currently consists of 4.7 million square feet of production space and employs approximately 7,000 hourly workers represented by the United Auto Workers Local 249.  The plant currently produces the Ford F-150 and the Ford Transit.  It is the largest car manufacturing plant in the United States in terms of units produced.  The plant is about 10 mi northeast of the Kansas City, Missouri city center.  Since its opening in 1951, the Ford Claycomo Plant, as many in the Kansas City area call it, has generated thousands of jobs, millions of tax dollars for the otherwise minor suburb, and is the largest tax generator in Clay County, Missouri.

Flat Rock Assembly Plant: Flat Rock Assembly Plant, formerly known as Ford's Michigan Casting Center (MCC) (1972–81), Mazda Motor Manufacturing USA (1987–92) and AutoAlliance International (1992–2012), is a Ford Motor Company assembly plant located at 1 International Drive in Flat Rock, Michigan in Metro Detroit.  The plant currently consists of 2900000 sqft of production space and employs 1,685 hourly workers represented by the United Auto Workers Local 3000, as well as 140 salaried workers.  The plant currently produces the Ford Mustang coupe and the revived Lincoln Continental.

Edison Assembly: Edison Assembly, also known as Metuchen Assembly, was a Ford Motor Company manufacturing plant in Edison, New Jersey.  It was located at 939 U.S. Route 1 and occupied over 100 acres when it was open.  The factory began operations in 1948 and was closed in 2004.  Several popular Ford products were manufactured there, such as the Ford Mustang, Ford Ranger, and the Ford Pinto.  When the plant opened in 1948, it manufactured the new Mercury branded and Lincoln vehicles.  It was one of three Ford manufacturing facilities in New Jersey and was built two years before the Mahwah Assembly plant was opened in 1950.

Ford Motor Company Edgewater Assembly Plant: The Ford Motor Company Edgewater Assembly Plant was located in Edgewater, Bergen County, New Jersey, United States.  The factory began operations in 1930 and was closed in 1955, having been replaced by the Mahwah Assembly plant.  The building was built in 1929 and added to the National Register of Historic Places on September 15, 1983, located at 309 River Road.  The building was torn down in 2006 and replaced with a residential development.

Edgewater, New Jersey: Edgewater is a borough located along the Hudson River in Bergen County, New Jersey, United States.  As of the 2010 United States Census, the borough had a population of 11,513, reflecting an increase of 3,836 (+50.0%) from the 7,677 counted in the 2000 Census, which had in turn increased by 2,676 (+53.5%) from the 5,001 counted in the 1990 Census.

Ford Motor Company Assembly Plant (Atlanta): The Ford Motor Company Assembly Plant at 699 Ponce de Leon Avenue in the Poncey-Highland neighborhood of Atlanta, Georgia was the headquarters of the Ford Motor Company's southeastern US operations from 1915 to 1942.  As a result of good sales in Atlanta, and a desire to decentralize production, Ford established a combined assembly, sales, service and administration facility on Ponce de Leon Avenue, selling a peak of 22,000 vehicles per year.  The assembly plant produced Model Ts, Model As and V-8s until 1942, when the plant was sold to the War Department and a new plant was opened in the Atlanta suburb of Hapeville.

Ford Trafford Park Factory: The Ford Trafford Park Assembly Plant was a car assembly plant established by the UK subsidiary of the Ford Motor Company.  The plant was located at a recently established industrial park called Trafford Park, beside the Manchester Ship Canal, a short distance to the west of Manchester.  It was the first manufacturing plant established by Ford outside the United States, though originally it was established merely to assemble vehicles using parts imported from Dearborn.

Ford New Zealand: Ford New Zealand.  Ford Motor Company of New Zealand Limited is the New Zealand subsidiary of Ford Motor Company.  Its distribution and assembly operations began in 1936 when it took them from the local franchisee.  Since the closure of its final assembly plant in Wiri, Auckland in 1997, all of its product offerings are fully imported, from Australia (Falcon and Territory, until end of 2016), Asia, Europe and as of late 2015 from the USA (Mustang).

Supporting paragraphs: Ford Motor Company Edgewater Assembly Plant Edgewater, New Jersey
Answer: Hudson River