"Caltrans employs 8,000 pounds of explosives to implode one of the old piers between noon and 12:40 p.m. Note that this will affect traffic, as they may stop bridge crossings between 11 a.m. and 1 p.m."

[sf.curbed.com]
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"Beginning on Saturday, Caltrans will remove Piers E4 and E5 of the Old Bay Bridge with the same implosion method used to bring down Pier E3 last fall. This method reduces the environmental impact and costs to taxpayers.

Pier E5 will be imploded on October 15 with 8,000 pounds of explosives, in less than three seconds. Pier E4's implosion will occur two weeks later, on October 29 in less than four seconds, with approximately 12,000 pounds of explosives."

[www.dot.ca.gov] [5 MB]