Silverado Contractors, Inc.
Bay Bridge Labor Day 2007 Demolition

Bay Bridge Labor Day 2007 Demolition

Silverado Contractors completed the daunting task of removing a 348 foot long x 75 foot wide section of the San Francisco Bay Bridge on Yerba Buena Island in 49 hours! Working around the clock with a total crew of over 200, Silverado achieved their goal of completing the job on time with no injuries. Following closure of the bridge at 8:49 p.m. on Friday night, Silverado immediately began installation of protective cover on the eastbound lower deck roadway. Then twenty concrete saws mobilized by Bay Line Cutting & Coring and Penhall Company sawcut the bridge deck into 48 sections in two hours time. After the first center section was removed the deck removal proceeded both eastbound and westbound with two teams of four excavators each working in conjunction with a dedicated crane provided and manned by Sheedy Crane of San Francisco. The deck sections were severed at their ends using excavator mounted hydraulic breakers and steel shears to cut the heavy reinforcing and post tensioning rods. Once severed, each of the forty-eight concrete deck and beam sections weighing an average of 170,000 pounds were hoisted to heavy haul trailers, also provided by Sheedy, for the ride to an Oakland lay down yard. Once the upper roadway was removed, Silverado began separating the concrete edge girders and columns and hoisting them to trucks for off haul. These nineteen members weighed up to 200,000 pounds each. By 8:00 p.m. Sunday evening demolition was in its final stages, allowing Mammoet to begin installation of the skid tracks needed for the roll-in of the new 6,700 ton replacement structure built by C.C. Myers. The new structure was rolled into place by Mammoet in under 2 hours, and after joint seal was installed by Penhall, the bridge was striped and opened to traffic at 6:00 p.m. Monday afternoon, 11 hours ahead of the Tuesday 5:00 a.m. deadline.



License No. 782547 | Phone: (510) 658-9960 | Fax: (510) 658-9961