Dive summary:

• The work needed to make up for suspension bolts that broke when being tensioned has blown away the once-hoped-for Labor Day opening of the San Francisco Bay Bridge, and the whole situation has California lawmakers saying that those responsible for delays and budget overruns have to be held "accountable."
• Dec. 10 is the closest date that optimists can shoot for because it is when the contractor, American Bridge/Fluor Joint Venture, hopes to finish installing saddles to make up for the loss of 96 bolts that were made too brittle by hydrogen released during hot-dip galvanizing.
• A study of 2,210 similar bolts used all over the bridge concluded that 740 rods can be replaced after the bridge opens, 557 bolts won't be put under as much tension as planned, and there will be augmented dehumidification for another 274 bolts and long-term monitoring for the rest – 639 of them.

From the article:

While engineers knew the risks of hot-dipping, Caltrans previously had used this method successfully on other bridges. However, the Bay Bridge rods would be under much higher tensioning. ...