Category Archives: City

MUNI Sunset Tunnel Trackway Improvement Project, SFMTA #1270

The work includes replacing the existing tie and ballast tracks; replacing existing overhead catenary system (OCS), including messenger wires, trolley wires and various components.  Seismic upgrade for portal retaining walls; upgrading traction power cable infrastructure; adding a new accessible key stop at Judah and 28th Street.   New VTAG loops at nine intersections...
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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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O’Shaughnessy Dam Electrical and Mechanical Upgrade

PrōVen replaced the water piping and the mechanical supports at the O’Shaughnessy Dam; and installed new conduits, wiring, switches, and junction boxes as necessary to comply with National Electric Code.  PrōVen also installed all new hydraulic systems for the gate valves operating flow for the entire dam.  Panel boards and miscellaneous electrical...
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Priest Reservoir Bypass Pipeline

The Priest Reservoir project was completed in 42 days.  During the construction of this project all water from the Sierra was shut down to the Bay Area.  This was a very important project for the SFPUC as a delay could have resulted in severe water shortages to the Bay Area.  Proven received a bonus for completing the project...
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