when crews welding the beams together skipped a crucial step in the process required by the building code that led to tiny, micro-cracks forming. Multiple inspections failed to notice the skipped step, and those micro-cracks grew into larger ones. After a thorough set of repairs and reviews, the transit center reopened to the public on August 11, 2019, nearly one year after its closure. Future development In 2018, real estate developers submitted proposals to demolish the Temporary Terminal and replace it with affordable housing and a park, but with the permanent transit center still closed for repairs at that time, the future of that proposed project was not known. See also California High-Speed Rail Ferry Building Key System List of tallest buildings in San Francisco Transbay Transit Center San Francisco Transbay development Transbay Tube Bibliography Earth Metrics Inc, ‘'Environmental Site Assessment, Assessors Block 3747, San Francisco'‘, File 7825W0.001, 25 April 1989 References External links Transbay Temporary Terminal website The temporary transbay terminal, operated 2010-2018. Planning Department district planning project Site with information on Key System service to the transbay terminal New Transbay Transit Center Photo: Key System Train Inside Transbay Terminal Transit Unlimited - Transbay Terminal transit information Key System train on ramp to Bay Bridge, 1939, Dorothea Lange photo Bus stations in San Francisco Demolished buildings and structures in San Francisco South of Market, San Francisco Former San Francisco Municipal Railway stations Transit centers in the United States Proposed public transportation in the San Francisco Bay Area Art Deco architecture in California 1939 establishments in California 2010 disestablishments in California Former railway stations in California Former bus stations Railway stations in the United States opened in 1939 Railway stations closed in 1982 Railway stations in the United States opened in 1995 Railway stations closed in 2000 Buildings and structures demolished in 2010 Demolished railway stations in the United States