Whether the $6.4 billion San Francisco-Oakland Bay Bridge in California will be opened on Labor Day should be known by noon Pacific time today. That news should help answer two critical questions: "Will the contractor finish in time the retrofit of two seismic stabilizers on which 32 steel anchor bolts snapped in March? And do test data sufficiently reassure engineers and officials that the span's other 2,210 high-strength steel bolts are sound?" Meanwhile, fabrication of a steel saddle that will be fastened to shear key plates with "superstrong cables" that would serve as a substitute for the faulty bolts has started.

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