Special District

Main Waste Water Treatment Plant, Grit System Improvements

PrōVen constructed a 140-million gallons per day Vortex Grit Tank Structure consisting of two 70-MGD Vortex Grit Tanks, all mechanical, structural, and electrical/control components. PrōVen also rehabilitated the existing bypass channel; provided new butterfly valves; gallery drain improvements; and site improvements.  Work involved activities and connections to the existing wastewater facilities.  All safety regulations were …

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Reconstruction of Aprons in the Vicinity of Hangars 1 through 5, North Field

The work on this project consisted of reconstructing portions of aprons including existing pavement, removing existing utilities, preparing sub grade, replacing storm drain lines, installing water lines, reconstructing pavement, installing new Portland cement concrete pavement, installing pavement striping and markings, and performing all associated work. Location: Oakland International Airport Oakland, California Start Date: September 2005 …

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