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I I I I I I I I I I I I I I I I I I I Table 2.2 Monthly Demand Pattern for All Deliveries Month % Demand Month % Demand January 7 July 10 February 6 August 10 March 9 September 10 April 7 October 8 May 9 November 7 June 10 December 7 The system design capacity 10 handle a 7-day peak demand for pumping plants and pipelines is computed as 13 limes the peak average monthly demand. Daily and diurnal demand peaking is handled by the community storage tanks. 2.2 Culler lateral The CUller Lateral serves lIuerfano, Nageezi, Counselor, Pueblo Pentado, Djo Encina, Torreon and Whitehorse Chapters in the eastern ponieo of the Navajo Nation and a ponico of the western Jicarilla Apache Nation, delivering up (0 4,645 acre-feel per year. The Cutter Lateral would obtain waler from the Cutter Reservoir, a feature of the NlIP main canal located as shown on Figure 2.1. The detailed layout is shown in Figure 2.2. The treatmCnI and pumping plant would have a footprint of about 3-4 acres located downstream of Cutter Dam in a previously disturbed area. The plant would have a capacity of 539 million gallons per day (mgd) or 834 cubic feet per second (cfs). Facilities would include mixing and flocculation tanks, three ultrafiltration units, three UV disinfection units, a 112,000 gallon subsurface pumping pIanl forebay. two wastewater polishing ponds, chemical storage buildings, an O&M building and a 4-unit pumping plane TIle associated electrical comrol equipmem necessary to power and control the electrically driven pumps and other ancillary equipment would also be comained on this site. The plant would feed approximately 89 miles of buried pipeline ranging in diameter from 1O~ inch to 24-inch. There would be five re-lift pumps along the route to maimain required delivery pressure, along with three community storage t.lOks and two regulating tanks. Much of the pipeline route is pardlleled with an overhead electrical trnnsmission line to power the pumping plams. A 230/69 KV substation would provide power from the existing 230 KV PNM transmission line. Figure 23 shows the location of the transmission lines, substation, pipeline and major project features. Each re.Jift pump would consist of a forebay tank. pumping plam, air chamber, chlorination building, electrical control and ancillary equipmem. The typical footprint would be about one acre, enclosed in a chain link fence. Each site would be totally contained with no open water. BIOLOGICAL ASSESSMENT NAVAJO GALLUP WATER SUPPLY PROJECT September 3, 2004 Page 5