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7.1.A. - Page 18 <br /> construction in landscaped areas, the landscaping would be replaced. Construction equipment <br /> would typically occupy approximately a 20- to 26-foot wide segment of the roadway. The <br /> transmission pipeline will range in diameter from 8-24 inches in the Central Redwood City area. <br /> Lateral pipeline diameters will range from 6 to 24 inches. The bore-and-jack method of <br /> construction is typically used for pipeline crossings of railroad tracks, creeks or other water <br /> bodies, major transportation facilities (such as highways), or congested street intersections.This <br /> method involves excavating a pit on either side of the area to be crossed. The pipeline is then <br /> installed by "jacking" or tunneling between the two pits. This method is more time-consuming <br /> than the trench and cover technique, but allows installation of pipeline without disrupting the <br /> surface along the whole length of the pipe. Both of these construction alternatives are <br /> evaluated in this document. <br /> There are several locations, shown in Table 1, where the pipeline may be installed using the <br /> bore-and-jack method. The preferred pipeline crossing of U.S. 101, as shown in the table, is to <br /> hang the pipe within an existing utility tunnel that runs underneath the highway near Maple <br /> Street. An alternative to this crossing would be to bore-and-jack the pipe under the highway <br /> between the intersection of East Bayshore and Bair Island Roads on the east and Convention <br /> Way on the west. <br /> TABLE 1: Anticipated Bore-and-Jack Pipeline Crossing Locations <br /> Approx. <br /> Length of <br /> Casing <br /> Location Agency Crossing Type Ilinear feet) <br /> Intersection of Woodside&Broadway Ca!trans Roadway/Highway 300 <br /> Intersection of Chestnut&Broadway Light Rail Railway 200 <br /> Southern Pacific <br /> From Marshall Street to Perry Street Railroad Railway 350 <br /> Intersection of Broadway&El Camino Real Ca!trans Roadway/Highway 300 <br /> San Francisco Public Hetch Hetchy <br /> Jefferson Avenue&Avenue Del Or Utilities Commission Water Pipelines 200 <br /> San Francisco Public Hetch Hetchy <br /> Hudson Street near Oak Avenue Utilities Commission Water Pipelines 200 <br /> San Francesco Public Hetch Hetchy <br /> Woodside near Menlo County Club entrance Utilities Commission Water Pipelines 200 <br /> U.S.101 crossing from Maple to Walnut Caltrans Utility Tunnel 300 <br /> Alternate 101 crossing near Bair Island Road Caltrans Roadway/Highway =+L) <br /> As indicated previously, the specific location for off-site recycled water storage reservoirs and <br /> pump stations has not been determined. However, for proper hydraulic functioning of the <br /> recycled water system, and to deliver water to customers at higher elevations in the City, one <br /> set of facilities would be located within the western portion of the Greater Bayfront area, and <br /> the other set of facilities located within the Central Redwood City area. The reservoirs will have <br /> a capacity of between one and two million gallons (mg).The size of a 1 mg reservoir ranges from <br /> 4 <br />