Four Corners/Geneva Ave is a passenger rail station on the MBTA Commuter Rail's Fairmount Line located in the Mount Bowdoin section of Dorchester, Boston. The new station was being built as part of the Fairmount Line Improvement Project, which includes four new stations as well as infrastructure upgrades. It has two full-length high-level platforms with walkways connecting them to Washington Street and Geneva Avenue. Four Corners/Geneva Ave opened on July 1, 2013, along with Newmarket.Background and historyMt. BowdoinService on the Fairmount Line began in 1855 and lasted until 1944. A station named Mt. Bowdoin was located near the Washington Street overpass. Originally one story, the small inbound station building was awkwardly modified with a second story below street level when the tracks were lowered to eliminate problematic grade crossings. There was a small shelter on the outbound side; a set of wooden steps leading to the outbound side are still extant.Restoration and planningTemporary shuttle service resumed on the Fairmount Line in 1979 during Southwest Corridor construction, with stops at Uphams Corner, Morton Street, and Fairmount. The MBTA planned to drop the shuttle after service resumed on the Southwest Corridor in 1987, but the service was locally popular and the Fairmount Line became a permanent part of the system. A plan called the Indigo Line was later advanced by community activists in which the line would add stations and more frequent service to closely resemble a conventional rapid transit line. The Indigo Line plan was not adopted, but elements of it were included when the Commonwealth of Massachusetts agreed in 2005 to make improvements on the Fairmount Line part of its legally binding commitment to mitigate increased air pollution from the Big Dig. Among the selected improvements in the Fairmount Line Improvements project were four new commuter rail stations on the line, including one at Geneva Avenue. The stations were originally to be completed by the end of 2011.