John Gilmore
Surface parking lot on the south end of the block.  Entrance on the north end, from Main St.  Heavily fenced & secured w guard shack, it's the Federal Reserve Bank of SF.  There may be underground stuff below, but that is more likely the Embarcadero MUNI/BART station.

Attached photo(s):
https://westnordost.de/p/104269.jpg
https://westnordost.de/p/104270.jpg