The Brooklyn, Bath and Coney Island Railroad, incorporated in 1862 with Charles Godfrey Gunther as president, opened the first part of its line, from 25th Street and Fifth Avenue to Bath Beach mainly along New Utrecht Avenue, on October 9, 1863. The extension to Coney Island was opened on June 9, 1864, making it the first steam railroad to bring beachgoers from downtown Brooklyn. At the Brooklyn end, the steam line ended at 36th Street and Fifth Avenue, where the BB&CI's own horse cars ran to a connection with those of the Brooklyn Central and Jamaica Railroad's Fifth Avenue Line and the Brooklyn City Railroad's Greenwood Line at 25th Street and Fifth Avenue. The odd double transfer was made necessary by the City of Brooklyn's refusal to allow the line to operate steam cars within its city limits. The road took its common name from the area of its terminal on Coney Island, where a hotel of the same name, but unconnected to the railroad, existed. Its terminal was known as West End Terminal, a name which survived upon major rebuilding in 1919 as New West End Terminal before that name fell into disuse. The road was reorganized in 1868, on January 22, 1879, and again on December 1, 1885, the latter time changing its name to the Brooklyn, Bath and West End Railroad, formalizing the use of West End in the line's name. Before that time, the original steam dummy cars, which consisted of a locomotive and passenger car in one railroad-coach-type frame, were replaced by conventional steam locomotives pulling unpowered coaches.
The Atlantic Avenue Railroad gained control of the West End in January 1893, leased it on May 8, 1893, and began to electrify it immediately without the permission of the town of New Utrecht. Effective May 21, 1893, the Atlantic Avenue extended its Fifth Avenue Line along the West End's trackage to the Union Depot at 36th Street, where West End trains were subsequently terminated. Electric trolleys began running on the West End Line from the Union Depot to Coney Island on November 18, 1893, and soon from the 39th Street Ferry. The Nassau Electric Railroad leased the Atlantic Avenue, and thus the West End, at midnight at the end of April 4, 1896, implementing its universal five-cent fare between Downtown Brooklyn and Coney Island. In late May the 86th Street Line was placed in operation, using the West End trackage from Bath Beach to Coney Island. Some West End cars were extended over the Brooklyn Bridge to Park Row in Lower Manhattan on February 15, 1898. The Brooklyn, Bath and West End Railroad and Atlantic Avenue Railroad were consolidated into the Nassau Electric Railroad in July 1898. The Brooklyn Rapid Transit Company gained control of the Nassau Electric in November 1898 and leased it to the Brooklyn Heights Railroad on April 1, 1899. On June 4, 1899, a new switch at Bath Junction was placed in service, and the Park Row-Coney Island cars were rerouted via the Sea Beach Line; West End cars from Downtown Brooklyn continued to use the West End Line through Bath Beach. BRT control paved the way for the line to be connected to the elevated system, and, on December 19, 1900, trolleys between 36th Street and Bath Beach were replaced with elevated trains from Park Row in Lower Manhattan; the line beyond Bath Beach to Coney Island was part of the 86th Street Line. Trains operated by third rail power over the Fifth Avenue Elevated to a ramp at 37th Street, and, from that point, trains raised trolley poles to operate using overhead wire to Bath Beach. A new bridge over Coney Island Creek was built to allow heavy elevated trains to run to Coney Island, and this service, from Park Row to Coney Island, began on July 13, 1902 for ten cents. The Nassau Electric Railroad lease to the Brooklyn Heights Railroad was canceled on June 30, 1904, and dual operation began, where the Brooklyn Heights operated the trains to 38th Street, and the surface operation beyond to Coney Island was done by the Nassau Electric. Elevated operations on the surface ended on June 24, 1916, when the new elevated West End Line, connecting into the Fourth Avenue Subway, opened to 18th Avenue. The line was built as part of Contract 4 of the Dual Contracts, but at the BRT's own expense. Trolleys continued to operate on the portion south of the Church Avenue Line until June 28, 1947.
