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City of Lamar Agenda Item 23b <br /> September 15-17,2015 Board Meeting(Updated September 18, 2015) <br /> Page 3 of 8 <br /> Project Description <br /> The objective of this project is to repurpose the use of two productive wells from a municipal potable <br /> water supply to a municipal irrigation supply. The repurposed non-potable water supply will replace <br /> potable water currently being used for municipal irrigation, up to 3.44 acre feet per day during <br /> irrigation season. This repurposed non-potable water supply will be used for irrigation of City facilities, <br /> freeing up potable sources for municipal demand. This will lessen both demand, as well as operation <br /> and maintenance costs, on Lamar's water treatment plant. In addition, the repurposed wells will <br /> eliminate the need for, and associated maintenance of, a floating pump at the City's recharge pond <br /> that currently serves as the source of irrigation water for the City's piped irrigation distribution <br /> system. <br /> The City considered the following alternatives: <br /> Alternative 1 - No-action: This alternative was considered unacceptable as it does not provide for the <br /> optimization of water resources by the City, and puts undue strain on City infrastructure during high <br /> demand periods. The City's water treatment capacity is at maximum during the peak irrigation system <br /> and struggles to keep up with demand. By continuing to use Lamar's potable drinking water as <br /> irrigation supply, the City will continue to unnecessarily treat up to 3.44 acre feet per day for <br /> municipal irrigation. <br /> Alternative 2 - Relocate/Re-drill Wells 12 and 13 as a potable water source: This alternative would <br /> seek to re-drill Wells 12 and 13 at new locations so they are no longer classified as GWUDI. This would <br /> allow their use as a potable water supply. This alternative was not considered feasible because a <br /> change in location of more than 200 feet requires a water rights change case in water court and there <br /> would remain a risk of uncertainty in water quality at the new location. The estimated cost of this <br /> alternative is $245,000. <br /> Selected Alternative 3 - Repurposing of Wells 12 and 13: Under this alternative the City will use the <br /> wells within its non-potable municipal irrigation system. New pumps and well casings will be installed <br /> at Wells 12 and 13. The original casings will be removed, and City crews will install new well casings <br /> utilizing their own recent well experience and installation equipment. New pumps will be dropped into <br /> the wells and the discharge lines will be tied into existing above-ground risers within the well pump <br /> houses. Outside the well houses, the existing discharge lines will be exposed, cut, and tied into a new <br /> transmission line. <br /> The two wells will be connected to each other via 1,175 LF of new piping and will be connected to the <br /> existing irrigation system infrastructure via approximately 1,975 LF of new piping. Power will be <br /> extended to the wells from existing adjacent transmission lines, utilizing existing transformers located <br /> in the original control buildings located at each well site. Finally, digital communication will be <br /> provided to each of the well houses via an unused existing supervisory control and data acquisition <br /> (SCADA) system currently owned by the City of Lamar Water Department. <br /> TABLE 1: ESTIMATED PROJECT COSTS <br /> Task Cost <br /> Design and Permitting $34,000 <br /> Construction $366,000 <br /> TOTAL COST $400,000 <br />