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I love thinking about how the BART tunnel was built. There were dozens of these sections that all had to be dropped in and locked together. This is a rendering from a 60s planning document.
Alexis C. Madrigal on Twitter 
Added 5 months ago by Jarrett Fuller
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Alexis C. Madrigal on Twitter 
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I love thinking about how the BART tunnel was built. There were dozens of these sections that all had to be dropped in and locked together. This is a rendering from a 60s planning document.
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