Both streetcar facilities were replaced by modern yards in the 1970s and 1980s . Muni Metro service to the Balboa Park complex began with the K Ingleside line in 1979 , followed by the M Ocean View line in 1980 and the J Church line in 1991 . In the early 2000s , BART and Muni began planning renovations to improve the accessibility of the station and its connections to the surrounding neighborhoods . A new BART entrance was completed in 2011 , followed by new Muni platforms in 2015 and 2017 and an additional footbridge in 2018 . Additional improvements like more elevators and modernized headhouses are proposed . The 1901-built office building and an adjacent powerhouse , both abandoned since the 1989 Loma Prieta earthquake , are planned to be renovated as a community center
1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
Balboa Park station