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Pipeline Segrnent No.1 Alignment <br />PWP Pipeline Segment No. 1 extends from the Pump Station No. 1 site at the North Campus <br />aquifer recharge and recovery facilities to the Pump Station No. 2 site. The Segment 1 <br />alignment lies within the Brighton and Commerce City municipal limits and in Adams <br />County. Land use along the alignment varies from agricultural, planned unit developments, <br />single-family residential developments, medium-density residential developments, and <br />mixed-use areas comprised of commercial, office and open space. Figure 6 below provides <br />an overview of the Segment 1 alignment. Segment 1 will cross the South Platte River <br />floodplain east of Riverdale Road and west of the Brighton Road, and the Third Creek <br />floodplain at Highway 85 near 144th Avenue and along the Potomac Road alignment <br />between 140th Avenue and 134th Avenue. <br />Within Commerce City, the pipeline alignment will generally be located within the E-470 <br />MUE, and will traverse through an agricultural area located between I-76 and Buckley Road <br />to avoid jurisdictional wetland areas adjacent to E-470. The City is determining where it <br />may be necessary to acquire additional temporary construction or permanent easements, <br />such as in areas parallel to the E-470 MUE and along the periphery of planned <br />developments, where it is likely that utility easements will be designated for the <br />developments. The selected alignment begins at a property north of a United Power <br />electrical substation at Highway 7 and Riverdale Road in Brighton. <br />The route south of Highway 7 crosses west of the Riverdale Road right-of-way (ROW) <br />through private property. The first 1.4 miles of the pipeline will pass through property with <br />a total of nine current landowners. Aurora Water and its team are coordinating with existing <br />landowners and stakeholders with respect to utilities planned along Riverdale Road. The <br />selected location of the South Platte River crossing avoids the Brighton Diversion structure <br />and future bank stabilization improvements proposed by the Urban Drainage and Flood <br />Control District (UDFCD, 2002). The selected alignment passes through a dike area between <br />two proposed gravel lakes. The pipeline will penetrate two slurry walls where cut-off walls <br />will be required to maintain the integrity of the slurry walls. <br />The design team considered and eliminated an alternative pipeline alignment south of the <br />river crossing along the Riverdale Road corridor to E-470, and east along E-47Q to the <br />selected alignment location at Potomac Road and E-470, because of construction restraints <br />and impacts on local residents along Riverdale Road. <br />The selected alignment continues southeast from the Medlin and Mitchel gravel pit areas, <br />through City of Brighton property, and will pass through seven private property parcels <br />before it crosses under U.S. Highway 85 and the parallel Union Pacific Railroad line. It <br />continues southeast to a lateral canal and then south along Potomac Street, crossing through <br />eight private property parcels before it crosses under the E-470 freeway. The remainder of <br />the alignment will follow the E-470 MUE and ROW. However, a short section between <br />Highway I-76 and Buckley Road will be located outside the E-470 alignment, in order to <br />preserve existing wetlands. The alignment through this area requires easement acquisition <br />from three property owners. <br />14 <br />