Category Archives: Retrofit

SFO Terminal Upper Level Viaduct Improvements, Phase 2

Seismic retrofit of the Upper Level Viaduct structure adjacent to SFO Terminal 3.   Work included micropile installation, pilecap extension, column casing installation, grade beam construction and expansion joint widening at sliding door locations.  This project also included incidental roadway work such as sidewalk and island demolition and reconstruction, pavement overlay, underground utility relocation/installation, exhaust fan...
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BART Earthquake Safety Program, Station Structures – C Line

ProVen retrofitted three BART stations along the C-Line, connecting Oakland to Bay Point: Orinda, Walnut Creek, and Pleasant Hill.  These retrofits entailed the respective excavations of all the station’s footings, surface demolition of columns, and forming around and drilling into all bent caps, followed by casting new reinforced concrete members and wrapping aforementioned...
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Wilbur Avenue Overhead Widening

This job was designed to increase the traffic and pedestrian traffic along Wilbur Avenue.  Work consisted of constructing a new 673 ft long by 54 ft wide structural steel bridge adjacent to an existing bridge on Wilbur Avenue and tying the two structures together.   The contract required the construction be performed during live...
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Colma Creek Flood Control Channel Wall Repair

This project included the repair and upgrade of a section of the Colma Creek at Spruce Avenue Bridge.  The existing concrete wall was removed and replaced with a concrete “U” channel, which created a concrete floor where the existing earthen bottom was.  PrōVen also replaced the failing walls with new ones.  The...
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Ulatis Creek Bridge Renovations

The Work on Interstate 80 included a variety of improvements to the existing pair of Caltrans Bridge Structures over Ulatis Creek in Vacaville. Major structural improvements to the bridges involved installation of six foot diameter drilled piers nearly 100 feet deep.  The piers were connected to the existing bridge abutments with cast-in-place...
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