page_title: Hynes Convention Center station
section_title: Construction
hierarchical_section_title: Hynes Convention Center station / History / Construction
caption_attribution_description: English: Massachusetts station under construction around 1914, viewed looking east from Massachusetts Avenue
context_page_description: Hynes Convention Center station is an underground light rail station on the Massachusetts Bay Transportation Authority Green Line. It is located at the intersection of Newbury Street and Massachusetts Avenue near the western end of the Back Bay neighborhood of Boston, Massachusetts. The station is named for the Hynes Convention Center, which is located about 700 feet to the east along Boylston Street. It has two side platforms serving the two tracks of the Boylston Street subway, which are used by the Green Line B branch, C branch, and D branch. The main entrance to the station from Massachusetts Avenue leads to a fare lobby under the 360 Newbury Street building.
  Construction of the station began in December 1912; it opened in October 1914 along with the Boylston Street subway for use by the Boston Elevated Railway. Construction on a surface-level transfer station for streetcars on Boylston Street and Massachusetts Avenue began in April 1918 and was completed the following November. These surface routes were gradually replaced by buses from the 1930s to the 1960s.
context_section_description: Plans made in 1907 for a westward extension of the Tremont Street subway called for a line along the south shore of the Charles River, called the Riverbank Subway. Though it was originally planned to have no intermediate stops, in 1910 the Boston Transit Commission (BTC) voted to add stations at Charles Street, Dartmouth Street, and Massachusetts Avenue. However, public opinion quickly shifted to a route under Boylston Street, which was developing rapidly. In July 1911, the Massachusetts legislature passed a bill providing for the construction of several tunnels, including the Boylston Street subway. New stations were to be located at Copley Square – a major civic center – and the Massachusetts Avenue thoroughfare.
  Subway construction began in March 1912. On September 24, 1912, the BTC acquired an easement through the Boston Cab Company building for the construction of Massachusetts station. The Hugh Nawn Company, a major local contractor, began work on the station on December 21, 1912. The BTC determined that the Cab Company building was not structurally sound; it purchased the structure on April 3, 1913 and demolished it soon after, allowing construction on the west part of the station to proceed. 
  Construction was complicated by the soil conditions, as the site was shoreline until the filling of the Back Bay in the 19th century. Wooden and concrete piles were driven through seven feet (2.1 m) of silt to provide a firm foundation for the station, and for future air rights development atop it. The station was built adjacent to the Boston and Albany Railroad cut to the south; one railroad track had to be supported on piles during construction. Although the station was constructed below grade, much of the top of the station was exposed; an alley was constructed on top. Some of the dirt removed during construction was used to fill the Charles River Esplanade near Cottage Farm, while the rest was dumped at sea. 
  As built, the station was 350 feet (110 m) long and a maximum of 90 feet (27 m) wide. The platforms were constructed three inches (76 mm) above the rails to serve streetcars, but sufficient overhead space was left if later conversion to high platforms for use with metro stock was desired. The station was constructed of reinforced concrete with granolithic platforms and floors. The ceilings and upper walls were finished with white plaster; the lower walls were white terrazzo with red-and-white tile borders. A waiting room for passengers transferring to surface streetcars was located on Massachusetts Avenue next to the main station entrance. The Boylston Street subway, including Massachusetts station, opened on October 3, 1914.
caption: Massachusetts station in 1914, before the surface station was constructed
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