Question: In what year did the railroad that built the High Bridge cease to operate?

Context articles: High Bridge Branch
Burlington Northern Railroad
Betsy Ross Bridge
Soo Line High Bridge
North High Bridge Park
Ferromonte Junction
Walkway over the Hudson
Dearborn River High Bridge
High Bridge, Washington
High Bridge (Latah Creek)

The High Bridge Branch was a branch line of the Central Railroad of New Jersey (CNJ) that started in High Bridge, New Jersey at a connection with the CNJ main line and continued north to iron-ore mines in Morris County.
 The High Bridge Branch line followed the South Branch of the Raritan River for much of its duration.
The Burlington Northern Railroad (reporting mark BN) was a United States-based railroad company formed from a merger of four major U.S. railroads.
 Burlington Northern operated between 1970 and 1996.
The Betsy Ross Bridge, also known as the Ross Memorial Bridge is a continuous steel truss bridge spanning the Delaware River from the City of Philadelphia in Pennsylvania to Pennsauken, New Jersey.
 Built from 1969 to 1974, and opened in April 1976, during the American Bicentennial Year, it was originally planned to be named as the "Delair Bridge", after a paralleling vertical lift bridge owned by Pennsylvania Railroad (which is now used by Conrail and New Jersey Transit's Atlantic City Line), but was instead later named for Betsy Ross, a Philadelphia seamstress and reputed creator of the first American flag in 1776, making it the first automotive bridge named for a woman in America and the second bridge overall (after Iowa's Boone High Bridge was renamed the Kate Shelley High Bridge in 1912).
The Soo Line High Bridge, also known as the Arcola High Bridge, is a steel deck arch bridge over the St. Croix River between Stillwater, Minnesota, and Somerset, Wisconsin.
 It was designed by structural engineer C.A.P. Turner and built by the American Bridge Company from 1910 to 1911.
 The bridge was listed on the National Register of Historic Places in 1977 for its national significance in the themes of engineering and transportation.
 It was nominated for its exceptional dimensions, beauty, innovative engineering techniques, and importance to transportation between Minnesota and Wisconsin.
North High Bridge Park is a 0.85 acre city park located on the east bank bluffs above the Mississippi River in Saint Paul, Minnesota, United States.
 The park is adjacent to the High Bridge and was created when the new High Bridge was finished in 1987.
 The park includes gardens, sculptures and an overlook of the Mississippi River.
Ferromonte Junction is a railroad junction located in the Kenvil section of Roxbury Township, New Jersey.
 It was originally formed by the crossing at grade of the Central Railroad of New Jersey's High Bridge Branch (former Long Valley Railroad) with the Delaware, Lackawanna and Western Railroad's Chester Branch (former Chester Railroad) and the connection to the Ferromonte Railroad.
 When the High Bridge Branch was abandoned east of the junction in the early 1980s, a switch was cut in to connect the western portion to the Chester Branch to replace the diamond crossover, and both lines are now operated by the Morristown and Erie Railway.
The Walkway over the Hudson (also known as the Poughkeepsie Bridge, Poughkeepsie Railroad Bridge, Poughkeepsie-Highland Railroad Bridge, and High Bridge) is a steel cantilever bridge spanning the Hudson River between Poughkeepsie, New York, on the east bank and Highland, New York, on the west bank.
 Built as a double track railroad bridge, it was completed on January 1, 1889, and formed part of the Maybrook Railroad Line.
 It was taken out of service on May 8, 1974, after it was damaged by fire.
 It was listed on the National Register of Historic Places in 1979, and its entry updated in 2008.
 It was reopened on October 3, 2009 as a pedestrian walkway as part of the new Walkway Over the Hudson State Historic Park.
The Dearborn River High Bridge is a Pratt half-deck truss bridge built in 1897, and has been placed on the National Register of Historic Places as it is one of the few bridges of its type left standing in the United States.
 On a half-deck bridge, the deck is attached in the center rather than, as is more common, top or bottom of the superstructure.
 It crosses the Dearborn River on Lake Bean Road (Montana Secondary 435) about 15 mi southwest of Augusta, Montana.
 The unusual design of the Dearborn River High Bridge suits it to carry light loads across high/deep crossings.
 It has four spans and originally had a wooden plank deck.
 It is the last standing pin-connected Pratt half-deck truss bridge left in the United States.
 Construction cost was $9,997.
 Construction began in 1896 and completed in 1897.
High Bridge is a census-designated place (CDP) in Snohomish County, Washington, United States.
 The population was 2,994 at the 2010 census.
 High Bridge includes the Echo Lake community and the former Echo Lake CDP, which was superseded by the larger High Bridge CDP in 2010.
High Bridge, a railroad bridge over Latah Creek in Spokane, Washington, was constructed in 1972 by the Burlington Northern Railroad, following that railroad's creation in 1970 through the merger of the Chicago, Burlington & Quincy, Great Northern, Northern Pacific, and Spokane, Portland & Seattle railways.
 The bridge links the former Northern Pacific mainline with the former Great Northern and Spokane, Portland & Seattle lines to the west.
 The Latah Creek railroad bridge and two bridges carrying Interstate 90 and Sunset Highway cross High Bridge Park.