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<br />Tank Freezing <br /> <br />A concern that should be noted for any style or type of tank is the possibility that a tank may <br />have ice formations during extended cold winter days. The freezing of a tank could be <br />threatening to both the tank and the availability of water to th~ system for fIre fIghting. For <br />this reason, we recommend that during the cold winter months, the water level in the tower <br />be lowered, and that the bounce be increased to allow warmer water to mix with the colder <br />water. Additionally, it is recommended that a submersible mixer be installed in the tank to <br />help circulate water and thus reducing ice buildups. <br /> <br />Future Well Consideration <br /> <br />Water supply for a City should have a total well firm capacity equal to 100% of the <br />maximum day demand. Total fIrm capacity is defIned as the capacity available with the <br />largest well out of service. The ultimate system will require a fIrm capacity for Centerville <br />of about 1.5 MOD or 1,040 OPM. Peak hourly demands are supplied by storage on the <br />system. <br /> <br />One well will be required to meet the required ultimate total production capacity of 1.5 <br />MOD. Centerville's current fIrm capacity is near 625 OPM, this is the capacity of Well No. <br />1. Well No.2 has a capacity of approximately 650 OPM. The current maximum day <br />demand in Centerville is near 0.6 MOD or 420 OPM, which has nearly doubled in the last 5- <br />10 years. Therefore, the City should consider construction of a new well in the near future. <br /> <br />Two current options exist for placement of the new well and should be considered when <br />designing and evaluations are made in the future. The following are the two options to be <br />considered and their advantages or disadvantages. <br /> <br />Option 1 - Locate the future well along 20th A venue. The advantage of placing the new <br />well along 20th Avenue is that placement of the well around this location will mean.that the <br />well is on a separate power grid system from the other two wells. The other two wells are <br />located on the Excel Energy system and placement of the new well along 20th A venue will <br /> <br />Water Tower Feasibility Report <br /> <br />26 <br />