09/05/2007 Council Packet - Laserfiche WebLink

Home Search

DRAFT 8 -17 -07 VI. FUTURE BOOSTER STATION NEEDS In the existing water system, the wells pump water directly into the distribution system and into the two elevated water tanks which provide the desired static pressure for the distribution system. The elevated water towers have an overflow elevation 1,054.5 feet. All chemical additions for the water system are made at each welihouse. The construction of a water treatment plant or central storage will require the well pumps to instead supply the proposed plant site, and they will need to be modified to pump water at lower heads. Well water will be pumped directly to the water treatment plant without chemical addition at the welihouse. To deliver water to the distribution system and the two elevated water tanks, a new high service pump station will need to be constructed at the water treatment plant. The finished water reservoir will provide water by gravity to the pump suction header and five high service pumps will supply the finished water to the distribution system and elevated storage tanks. The preliminary selection of the high service pumps are shown in Table 3: Table No. 3 High Service Pumps Number of Pumps Individual Capacity (GPM) Total Head (ft) Estimated HP Required 2 7,500 150 350 1 5,000 150 250 2 3,000 150 150 Firm pumping capacity for the high service pump station should be 18,500 GPM or 26.6 MGD. The pump capacity selected will provide peak hourly flow discharge of 2.5 times the estimated maximum daily water demand of 7,300 GPM or 10.4 MG. To effectively utilize electrical energy and minimize electrical demand and costs, three pump sizes were selected to match the various daily water demands anticipated on the system. The standby generator provided should be sized to provide standby power for the Water Treatment Plant Study 8 13843.000