The San Francisco Bay Area Rapid Transit District will accept bids through Aug. 2 for the Earthquake Safety Program Transbay Tube (TBT) Internal Retrofit. The $200-million to $330-million project calls for fabrication and installation of up to 9,269 tons of ¾-in.-thick steel plate in the galleries and bores of the rail tunnel under San Francisco Bay. Construction is expected to start in October. San Francisco Bay Area Rapid Transit District, 300 Lakeside Dr., 16th Fl., Oakland, 94612. DR#16-00529931.