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City of Aurora January 23-24, 2007 Page 4 of 7 Agenda Item m f . Package E - Pumping Stations No.1, 2, and 3 · Package G - Transmission Pipeline Segment No. 1 . Package H - Transmission Pipeline Segment NO.2 . Package I - Transmission Pipeline Segment NO.3 . Conveyance System Description Pumping Stations The conveyance system will include three pumping stations, located at interim points along the conveyance pipeline. Pump Station #1 - The City selected the PS-1 site as part of a larger land parcel consisting of about 28 acres between the Brighton Ditch and Brantner Ditch north of Highway 7 in Adams County. A United Power substation along Highway 7 is located immediately south of the PS-1 site. Past uses of the site include agriculture, livestock grazing, and open space. The site has an elevation of 4,979 feet above mean sea level. The site will include the pumping station, a forebay, and a storm water detention basin. The site also includes space for a future second raw water pumping station. Pump Station #2 - The site for PS-2 is west of the E-470 multi-use easement (MUE) between 96th Avenue and 88th Avenue at an elevation of about 5,292 feet above mean sea level. Pump Station #3 - The 20-acre, City-owned PS-3 site is east of Powhaton Road and south of 1-70, adjacent to the Watkins Trailer Park. The site was confirmed to be suitable for the construction of . PS-3 before it was purchased by the City. In addition to the pump station the site will include a storage reservoir and space for a future second raw water pump station. The site ground elevation is approximately 5,600 feet above mean sea level. Pipeline The 33-mile, raw-water pipeline will consist of a 60-inch-diameter flexible steel pipe that will convey raw water from the Pumping Station No. 1 forebay to the new Aurora Reservoir Water Purification Facility (South Campus) in three segments. The pipe will be buried for its entire length, and will include trenchless crossings beneath waterways, wetlands, highways, major arterial streets, railroads and canals as required. Pipeline Segment NO.1 Alignment - The 9-mile pipeline alignment extends from the PS-1 site at the North Campus aquifer recharge and recovery facilities to the PS-2 site. The alignment lies within the Brighton and Commerce City municipal limits and in Adams County. Land use along the alignment varies from agricultural, planned unit developments, single-family residential developments, medium-density residential developments, and mixed-use areas comprised of commercial, office and open space. Within Commerce City, the pipeline alignment will generally be located within the E-470 MUE, and will traverse through an agricultural area located between 1-76 and Buckley Road to avoid jurisdictional wetland areas adjacent to E-470. Pipeline Segment No.2 Alignment - The 12.5-mile pipeline corridor from the preliminary site selected for PS-2 to the PS-3 site is mostly undeveloped with some agricultural use, private residences and farmhouses. Segment 2 crosses the City of Aurora municipal limits, Arapahoe County, Commerce City and Denver County. The majority of the Segment 2 alignment is within the . west side MUE of E-470, which will minimize the number of easement acquisitions and streamline . the permitting through one agency.