SFPUC 2001 Alameda Watershed Management Plan

III. ENVIRONMENTAL SETTING AND IMPACTSK. UTILITIES AND PUBLIC SERVICESprograms, in addition to long-term water resource management planning. These divisions areheadquartered in San Francisco.1.2 OTHER UTILITIESUtility SystemsLocal utilities at the Alameda Watershed are a mix of utility-owned and SFPUC-owned electricaland telephone lines. The more remote the Watershed keeper cottage or other facility, the morelikely that the utility lines servicing the facility are owned and maintained by SFPUC. Watersupplies at the Watershed cottages are provided by a combination of spring water lines,municipal water service from water retailers, and the Sunol Valley WTP. Pacific Gas andElectric (PG&E) provides electrical services to Watershed facilities through 60-kilovolt (kV)head transmission lines within the Watershed.Sewerage and Water Supply SystemsRemote SFPUC facilities in the Alameda Watershed rely on chemical toilets as sanitationfacilities. Most SFPUC facilities, including the Sunol maintenance facility and Watershedkeeper cottages, have sewage vaults to contain waste for regular pickup and disposal. The SunolValley Golf Course operates a small wastewater treatment plant that has a capacity of about12,000 gallons per day. The mining operations and nurseries in Sunol Valley have eitherchemical or sewage vault toilets. The Sunol Regional Wilderness area maintains 25 chemicaltoilets and five sewage vault toilets. No septic systems have been identified on SFPUC-ownedlands in the Watershed. Septic systems for residential uses are present on some privately andinstitutionally owned parcels on the Watershed (such as Welch Creek).Emergency water facilities for firefighting in the Alameda Watershed consist of water hydrantsat the Watershed keeper cottages that connect to a 2-inch supply pipe and three water hydrantsalong the Calaveras Pipeline. Water supply systems are also located at the leasehold nurseryoperations in the Watershed. Intermittent water availability in the Calaveras Pipeline may occurif water is drawn from the pipeline for firefighting. The Watershed reservoirs are the majorsource of firefighting water supplies in the Watershed.1.3 PUBLIC SERVICESPG&E natural gas and/or electrical transmission lines are located along two corridors in theAlameda Watershed. A 230,000-volt electrical transmission line runs from the PG&E Newarksubstation to the Metcalf substation south of San Jose and crosses the Watershed west of theCalaveras Reservoir. One 60-kV overhead electrical transmission line runs along VallecitosRoad; and 60-kV and 115-kV overhead electrical transmission lines run along I-680 to theNewark substation.According to PG&E, three high-pressure natural-gas transmission lines run through theWatershed in the San Antonio Valley, east of Vallecitos Road: a 24-inch-diameter (500 pound)NOP 96.223E: Alameda Watershed Management Plan III.K-6 ESA / 930385January 2001