The New Irvington Tunnel project in Alameda County, California is part of the $4.6 billion Water System Improvement Program (WSIP) launched in 2002 to repair, replace, and seismically upgrade the aging San Francisco Regional Water System, often referred to as the Hetch Hetchy system. Owned and operated by the San Francisco Public Utilities Commission (SFPUC), the system delivers drinking water to 2.5 million people in the five counties of San Francisco, San Mateo, Santa Clara, Contra Costa, and Alameda.
Built between 1928 and 1930, the existing Irvington Tunnel is an important part of that water delivery system because it connects the water supplies from the Sierra Nevada Mountains and the Alameda Watershed to Bay Area water distribution systems serving SFPUC customers. Expected to be completed by early 2014, the new 3.5-mile tunnel will lie parallel to the existing tunnel between the Sunol Valley south of Highway I-680 in unincorporated Alameda County and the Mission San Jose district in Fremont. The Town of Sunol receives the majority of its water from the SFPUC and the City of Fremont receives approximately 30 percent of its drinking water from the system.
Constructing a tunnel parallel to the existing Irvington Tunnel, in Alameda County, Calif., allows the San Francisco Public Utilities Commission to decommission the Irvington Tunnel for inspection and rehabilitation to improve the water delivery reliability. The total construction cost for the project is estimated at $154 million.
The exterior walls leading to the location were stained and required to have superior anti-graffiti protection to help prevent, deter and protect the structure from the elements, paint, labels, markers, other graffiti and various chemicals.
The SEI Chemicals Graffiti Proofer was tested and selected for this project. The wall featured in the above picture is approximately 9,000 sq ft and is coated with SEI’s GPA-300 Graffiti Proofer non-sacrificial anti-graffiti coating. Graffiti removal can be performed without using any chemicals.
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