Proven Manangement Inc

Professional Engineers, General Contractors, Home Builders

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Map & DirectionsDirections712 Sansome StSan Francisco, CA 94111 Write a ReviewWrite Review

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Neighborhoods: Northeast San Francisco, North Beach
AKA: Proven Management Inc
Categories: Professional Engineers, General Contractors, Home Builders

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Phone: (415) 421-9500

Address: 712 Sansome St, San Francisco, CA 94111

Proven Manangement Inc

Construction

New Construction

Landscaping and Fencing

Driveways
Excavation
The work elements include: construction of over 48,600 linear feet of soldier and CIDH piles to support both timber lagging walls and concrete floodwalls. During construction, more than 4,500 cubic yards of concrete was placed to construct the floodwalls and nineteen 12’ x 12’ pre-cast reinforced concrete box culverts set underneath Story Road. The work involved in channel widening and sediment removal required over 100,000 cubic yards of in-stream excavation. Other project features included construction of access ramps, utility coordination, placement of 17,500 tons of rock slope protection, relocations and shutdowns of the overhead electrical transmission lines, planting of vegetation, and modification of neighborhood which required close monitoring for vibration damage to over 100 structures.
Retaining Walls
This project consists of the replacement of four active railroad bridges in the City of San Mateo. Major elements of each bridge are reinforced concrete abutments and wing walls on micropile-supported, cast-in-place footings. The new bridges are assembled adjacent to the existing structures and during each 54-hour shutdown, the existing bridge is lifted out and the newly constructed steel girder bridges raised into place and put into service – all during the shutdown. In order to accommodate the increased height of the new bridge spans, the project requires a four-foot vertical track raise of over 2,000 linear feet of active track. To accomplish the increase of the trackway elevation, over 4,000 linear feet of post and pile retaining wall had to be accomplished prior to installation of the new bridges.

General

Masonry
Electrical Work
Work on the new third generating unit at Tulloch Lake and Dam in the Sierra foothills near Oakdale, California involved many facets of heavy construction. In order to install the new 6-megawatt generator, PrōVen’s crews had to remove over 15,000 cubic yards of solid granite, including an 80-foot deep shaft beneath the existing Tulloch Dam. Using both drill and shoot techniques and mechanical means, PrōVen’s crews were able to excavate the rock to create access to the new powerhouse addition and the vertical shaft in the rock necessary for installation of the 1650mm variable pitch Kaplan turbine. The existing 69″ low level outlet piping from the original dam was reconfigured into a bifurcated penstock to provide the flow to the new turbine assembly. During the shaft excavation for the turbine installation a cofferdam was designed and constructed by PrōVen to alleviate water intrusion from the river due to a previously unforeseen geologic condition. Construction of a three-story, reinforced concrete powerhouse structure to enclose the new generator facility with all required mechanical systems was performed by PrōVen’s own forces with electrical work being subcontracted to San Joaquin Electric from Stockton, California. All work was performed in compliance with strict environmental protection requirements for the Stanislaus River and without any lost-time accidents by PrōVen and their subcontractors.

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