The branch line was built under the name of the Lowell and Andover Railroad and gave the B&M a direct link between Lowell and Boston which it did not have before because of a 30-year monopoly that the Boston & Lowell was granted when it received its charter in 1830. By 1865, the monopoly was gone and the B&M was free to build a line to Lowell.
The rail junction is still in use as of November 2016 by Pan Am Railways as part of its Freight Main Line between Maine and upstate New York, but the connection between the former Lowell Branch and the main line heading south to Boston is not in service, as the freight service between Lowell and Boston is run down the old Boston & Lowell main line.
Before the junction was put in, the area was very rural and part of Ballardvale Village. After the junction went in, Lowell Jct has built up with industrial parks, office buildings and small neighborhoods.
Today, Lowell Junction sees up to 10 Pan Am Railways freights daily. New Hampshire Northcoast Corporation also runs two nightly freights under Pan Am Railways symbol, DOBO/BODO
References
Karr, Ronald D. (1995). The Rail Lines of Southern New England - A Handbook of Railroad History. Branch Line Press. ISBN0-942147-02-2.
Boston & Maine Railroad Employes Timetable 4, April 28, 1929.
