This project involved the construction of a 72-inch diameter pipeline approximately 7 miles long, which consisted of multiple Hayward Fault Crossings, new control buildings and valve lot structures. Project components included 34,450 LF of 72″ Cement Coated & Mortar Lined and 2,000 LF of 72″ Polyurethane C&L steel pipe; 2,920 LF of 60″-66″ Cement Coated & Mortar Lined steel pipe, 281 LF of 108″ Cement Coated & Mortar Lined steel pipe; Jack and Bore; Scada System Joint Trench; Venturi meter; Isolation Valves; 5 customer turnouts, mechanical, electrical, SCADA, and corrosion control.
Work included placement of several large butterfly valves: 4 EA 72″, 2 EA 66″, 1 EA 60″, 3 EA 42″, and 2 EA 24″; placed within several vaults and control buildings. Eight areas were installed by method of trenchless crossings (under major highways and major intersections), while open cut areas required right of way improvements plus hydroseeding and landscaping restoration. The work was performed in the unincorporated areas of Alameda County and in the cities of Newark and Fremont.
Category: Water Transmission
Client Type: City, San Francisco