Laserfiche WebLink
' <br />� <br />� <br />' <br />' <br />, <br />u <br />' <br />' <br />�� <br />C <br />I <br />� <br />�,� <br />, <br />I� <br />'J <br />' <br />� <br />' <br />' <br />4.0 AGUA WELL PUMPING AND REPLACEMENT REQUIREMENTS <br />As previously mentioned, the 2003 Plan including projected pumping and wellhead depletions was not <br />representative of a typical year due to the drought. Ordered pumping, the number of active wells, the <br />amount of allocated pumping and the cost of replacement water were all affected. In order to present a <br />more representative picture of AGUA's average year operations we have used data from AGUA's March <br />1, 2002 plan. The 2002 plan year began as a relatively normal year but within the first couple of months <br />became severely affected by the developing drought. Therefore only the March 1, 2002 Plan information <br />is used for this analysis. Amendments to the 2002 Plan are not considered. <br />AGUA's March 1, 2002 Plan provided for the replacement of depletions accruing to the Arkansas River <br />and to Fountain Creek caused by the projected pumping of 398 active (out of 485 total) AGUA member <br />wells. The total annual amount of pumping approved in the plan was approximately 33,202 acre-feet. <br />The amount of projected pumping used in the plan was the annual estimate provided by each well owner. <br />AGUA made replacements due to an additional 921 acre-feet of pumping from 20 active (24 total) Booth <br />wells, 256 acre-feet of pumping from 18 active MAGUA wells and approximately 134 acre-feet for <br />substitute water supply plans. <br />Depending on the type of use, a presumed (provided in the Arkansas River Basin Rules) or estimated <br />(provided by Tetra Tech RMC and approved by the Division Engineer's Office) depletion factor is <br />assigned to each well. According to the Arkansas River Basin Rules, wells using sprinkler irrigation are <br />presumed to be 75 percent depletive, wells using flood or furrow irrigation with no other source of water <br />(sole source) are presumed to be 50 percent depletive, and supplemental wells for flood or furrow <br />irrigation are presumed to be 30 percent depletive. Household and municipal uses are estimated to be <br />38.75 percent depletive based on previous engineering studies. The estimated annual pumping for the <br />well times the depletion factor is the wellhead depletion for the well. The annual wellhead depletions are <br />distributed monthly using irrigation and municipal patterns based on historical use. <br />Projected 2002 Plan year wellhead depletions were determined to be 14,738 acre-feet for AGUA wells, <br />697 acre-feet for Booth wells, 211 acre-feet for MAGUA wells and approximately 134 acre-feet for the <br />substitute supply plans. The total wellhead depletions for all AGUA obligations were approximately <br />15,780 acre-feet. Because of the lagged patterns by which the return flows accrue to the rivers, some of <br />AGUA — 2003 Feasibility Study - g- August 15, 2003 <br />