2003-04-09 CC Packet - Laserfiche WebLink

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would need to be checked against the 100-year flood plain elevation. The east end of the site is higher than the west side of the site, and would probably be the preferred tank location. The third potential tower location would be to construct the new elevated tank either immediately adjacent to or in-place of the existing 100,000 gallon tank in the City's Municipal Park. This location will also work for the proposed elevated tower provided a 12-inch main is installed on Shad Ave between the proposed tower and Main Street. With this 12-inch main in place, the Municipal Park tower site provides approximately 85% of the fire flows available for the Industrial Park as compared to the City Hall tank location. If the 12-inch main on Shad Ave is not constructed, then the Municipal Park tank site does not provide satisfactory fire flows to the Industrial Park. Previous comments regarding the main improvements on Eagle Trail and Center Street are applicable to the Municipal Park site as well. The site itself may be the most difficult construction project of the three sites. From an overall site perspective, it would be advantageous to remove the existing 1 OO,OOO-gallon prior to construction of a 500,000-gallon tank. This could be done ifthe City were to make the Lino Lakes interconnection and Lino Lakes would agree to provide water service to the City of Centerville for the complete construction period which could approach one year. If this kind of an agreement cannot be reached, then it will be necessary to construct the new tower adjacent to the existing tower and leave both towers in service or remove the 100,000 gallon tank after the new tank is completed. Ifboth tanks are left in place, this arrangement does eliminate the need to place an altitude valve on the existing tank if the new tower is placed at the same high water level (HWL) as the existing tank. Hi~h Water Elevations The current high water level of the existing 100,000-gallon tank is 1048. The high water level of the Lino Lakes system is 1054.5. Due to the location of Well No.1 with respect to the existing tower and Well No.2 with respect to either of the proposed Industrial Park or City Hall tower sites, we feel that it would be prudent to construct the new proposed tower to a high water elevation of 1054.5. This is to make sharing with the Lino Lakes water system easier and because it would be necessary to construct an altitude valve at the existing 100,000 gallon tower site in either case. An altitude valve is required because it will be advantageous to control the well pumps from the largest