Philadelphia was an early railroad hub, with lines from all over meeting in Philadelphia.
 The first railroad in Philadelphia was the Philadelphia, Germantown and Norristown Railroad, opened in 1832 north to Germantown.
 At the end of 1833, the state-built Philadelphia and Columbia Railroad, part of the Main Line of Public Works, opened for travel to the west, built to avoid loss of travel through Pennsylvania due to projects such as the Erie Canal.
 At the same time, the north-south leg of the Philadelphia City Railroad opened, running south along Broad Street from the Philadelphia and Columbia.
Edaville Railroad is a heritage railroad in South Carver, Massachusetts, opened in 1947.
 It is generally regarded as one of the oldest heritage railroad operations in the United States.
 It is a narrow gauge line that operates excursion trains for tourists, built by the late Ellis D. Atwood (initials E.D.A, for which "Edaville" is named) on his sprawling cranberry plantation in Southeastern Massachusetts.
The North Brookfield Railroad in central Massachusetts in the United States was a 4.16 mile railroad opened in 1876.
 It connected North Brookfield to the Boston and Albany main line at East Brookfield.
 The B&A leased the line from opening until they were in turn leased by the New York Central Railroad in 1900.
 The NYC merged to form the Penn Central Railroad in 1968.
 The line was abandoned by Conrail in the 1970s.
 In the early 2010s, an attempt was made to rebuild the line to service companies in the area.
The Raleigh and Gaston Railroad was a Raleigh, North Carolina-based railroad opened in April 1840 between Raleigh and the town of Gaston, North Carolina, on the Roanoke River.
 It was North Carolina's second railroad (the Wilmington and Raleigh Railroad opened one month earlier).
 The length was 100 mi and built with gauge.
B&O Railroad Depot was one of several railroad stations in the city of Pittsburgh, Pennsylvania during the late 19th and early 20th century.
 The station was built in 1887, 16 years after the B&O Railroad opened its first railroad line into Pittsburgh.
 The station was built next to the Monongahela River.
 B&O railroad trains also used the Pittsburgh & Lake Erie Railroad Station for services that continued westward towards Chicago via the Pittsburgh & Lake Erie Railroad.
 In 1955 the station was demolished to make room for an interstate highway and remaining services were transferred to Grant Street Station.
 The building was designed by Frank Furness who also constructed the B&O Railroad's Philadelphia station.
The Salt Lake and Utah Railroad, also known as the Orem Line or Orem Interurban, was an electric railroad which operated between downtown Salt Lake City and Payson, Utah.
 Construction of the main line begun in 1913.
 The railroad was financed by A. J. Orem & Company, with Walter C. Orem as president.
 The railroad opened in 1914 with stops in both Utah County and Salt Lake County.
 The railroad also operated a branch line which ran to Magna, Utah.
 Both passenger and freight service was offered.
 The line's terminus in downtown Salt Lake City was shared with the Bamberger Railroad, and was located at the current site of Abravanel Hall.
 The railroad stopped service in 1946.
The Cliffs Erie Railroad (reporting mark LTVX) was a railroad that operated from Hoyt Lakes to Taconite Harbor, Minnesota.
 The railroad opened in 1956 by Erie Mining Company to transport taconite from Hoyt Lakes to Taconite Harbor.
 In 1989, LTV Steel purchased Erie Mining and the railroad was renamed LTV Mining Railroad.
 The railroad closed in early 2001 when the LTV company ended the operations of the harbor.
 In 2002 Cleveland Cliffs bought the plant, and again renamed the railroad The Cliffs Erie Railroad (combining the names Erie Mining and Cleveland Cliffs).
 In 2004 Cliffs Erie hired a contractor to claim leftover chips and pellets from the mine due to the high iron prices.
 They used the only unsold locomotives, EMD F9s (borrowing one from Lake Superior Railroad Museum).
 The cleanup trains ran until 2008 when the last train ran.
 In 2014, the F9s were sold off.
 The railroad is now sitting, unlikely to ever see activity again.
The Monocacy river bridge and viaduct is a 326 ft open deck steel girder bridge with two main spans crossing the river and 2 viaduct sections crossing the floodplain, south of Walkersville, Maryland.
 Originally constructed by the Frederick and Pennsylvania Line Railroad Company (F&PL).
 Construction began in late 1871, and continued until July 1872 when the railroad opened that year.
 It was rebuilt by the Pennsylvania railroad prior first in 1900-1905 as an open deck riveted iron plate under girder bridge.
 In 1915, the bridge was surveyed as part of the Interstate Commerce Commission's ("ICC") effort to establish freight rates for the Parent railroad.
 In 1927, the Pennsylvania railroad rebuilt the bridge again using deeper and thicker steel girders, but leaving the masonry piers intact.
 In 1972, the two 85 foot river spans were washed out by Hurricane Agnes.
 In 1982, the State of Maryland purchased the bridge as part of the railroad line.
 In 1995, the State rebuilt the river spans and Pier 3 which is located in the middle of the river crossing was completely reconstructed using concrete to replace the original masonry foundations.
 In 2015, the State performed minor maintenance on the structure and painted some spans.
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The Denver, South Park, and Pacific Railroad (later called the Denver, Leadville and Gunnison Railway) was a historic narrow gauge railroad that operated in Colorado in the western United States in the late 19th century.
 The railroad opened up the first rail routes to a large section of the central Colorado mining district in the decades of the mineral boom.
 The railroad took its name from the fact that its main line from Denver ascended the Platte Canyon and traversed South Park.
 Founded in 1872 by Colorado Governor John Evans, the company was purchased by the Union Pacific Railway in 1880, though it continued to be operated independently.
 The line went bankrupt in 1889 and was reorganized under the new moniker the Denver, Leadville and Gunnison Railway.
 When the Union Pacific went bankrupt in 1893, the DL&G lines went into receivership and were eventually sold to the Colorado and Southern Railway.
 In the first half of the 20th century, nearly all the company's original lines were dismantled or converted into .
 The last train to run the old DSP&P tracks was from Como, Colorado on April 11, 1937.
 A section of the standard gauge line between Leadville and Climax is still operated as a passenger excursion railroad called the Leadville, Colorado and Southern Railroad.
 At its peak the Denver, South Park and Pacific Railroad had 335 mi of narrow gauge line, making it the largest narrow gauge railroad in the state of Colorado.
Bates Pond is a 20 acre pond in Carver, Massachusetts.
 The pond is located south of Edaville Railroad.
 Huckleberry Corner lies along the southern shore of the pond.
 The water quality is impaired due to non-native plants in the pond.

Question: When was the railroad opened which is north to the Bates Pond?
Answer: 1947