1989-11-14 - Laserfiche WebLink

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I I I Council Meeting Minutes November 14, 1989 Page 10 Council Business, continued Council Business A Water Demand Study prepared by Barr Engineering supports the need for additional new water supply. The study concluded, based on 1976 Request for Additional water use patterns and current development, the city could expect Water Supply water usage on peaks days of 10.2 million gallons. Report 89-279 Since the discovery of the contamination in 1981, it has been necessary to control water usage by lawn watering restrictions and bans because of the i nabi 1 ity to meet an unrestri cted rate of demand. New developments will place additional demand on an already deficient supply. Construction will begin on a 150 unit residential deve 1 opment located north of I -694 and west of 27th Avenue NW. Another residential development includes 130 units plus a commercial development currently under study for a site located west of Silver Lake Road and north of County Road E. The peak water usage from these two areas would be about 1,400 gallons per minute. Under the terms of the City's litigation settlement agreement, the Army has to provide additional water supply to the City for growth. Two options for pursuing additional water supply are: the construction of another PGAC Facility or use of water from the Plume Groundwater Recovery System (PGRS). In the agreement, the Army is to pay the costs associated with construction of another PGAC Facility, and the City would be responsible for the installation of a new well. The proposed PGRS would be constructed in the Rush Lake area. The PGRS woul d produce about 1, 000 gallons per mi nute from 5 small wells. The preliminary plan for the PGRS facility calls for piping the water back to the TCAAP where it would be treated with an air stripper. If the capacity of the PGRS could be increased to 2,500 gallons per minute and a PGAC treatment facility were constructed, the water produced by the PGRS and treated by PGAC could meet the City's water needs. To pursue either option for additional water supply, staff recommends meet i ng with the Army and the MPCA to determi ne the feasible options. Staff would also need to meet with the City's consultants to determine the quantity of needed water.