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• <br />The flows represent a population equivalent in 1995 of <br />approximately 9,300 for Orono. This includes schools, commercial, <br />industrial and.residential use. The ultimate population of Orono <br />with the present zoning code is 13,870. Ito changes in flows <br />other than Orono's have been made. <br />Based on the pipe to be installed, there cannot be a large <br />increase in pumping capacity from the Orono or Long Lake <br />facilities. <br />PUMPING STATIONS <br />Station curves were prepared for the Orono and Long Lake <br />• pumping stations based on 16" lines from each station and a 20" <br />forcemain after the lines come together (Exhibits B and C). <br />Because the Orono station curve with a 16" forcemain rapidly <br />increases in bead loss with increasing pumping capability and the <br />Orono pumps would operate almost at shutoff of the Long Lake station <br />it was. determined that the Orono forcemain should be 18". Exhibit <br />D is a station curve using 18" forcemain from Orono to the 20" <br />combined line. This will provide the Metropolitan Waste Control <br />Commission with a much more satisfactory operation for both the <br />Orono and Long Lake stations. <br />Exhibit E is a head loss curve for the 20 inch forcemain from <br />the confluence of the Orono and Long Lake branches to the Wayzata <br />pumping station. <br />-3- <br />