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APPENDIX A-2 Central Colorado Water Conservancy District -Well Augmentation <br />Subdistrict Plan -Plan IDs 0103394, 0203394, 0303394, and 0403394 <br />Central Colorado Water Conservancy District (Central) is an umbrella organization that covers <br />well users under multiple ditch systems and ground water-only wells in Adams, Weld, and <br />Morgan Counties (see Figure 1). The Central District is composed of two subdistricts that <br />extend from about the City of Brighton down to the City of Fort Morgan, including significant <br />portions of the Beebe Draw and Boxelder Creek drainages: <br />• Groundwater Management Subdistrict (GMS) <br />• Well Augmentation Subdistrict (WAS) <br />The Groundwater Appropriators of the South Platte (GASP), formed in 1973, was dissolved in <br />2004 because of subsequent years of full-time river calls and insufficient replacement supplies to <br />replace its member wells' depletions. The WAS subdistrict was formed in 2004 to cover the <br />majority of GASP wells located in the Central District. The WAS augmentation plan is still <br />pending (Case No. 03CW99), therefore, no WAS water right supply information is currently in <br />HydroBase (Version 20060816). After the decree is entered in the 03CW99 case, the tables <br />below and recommended model operations should be completed based on a review of the decree <br />and any information updated in HydroBase. <br />The number of wells associated with the augmentation plan from sources reviewed for this effort <br />is summarized in Table 1. For WAS augmentation plan (Plan IDs 0103394, 0203394, 0303394, <br />and 0403394), the WD identifier generally the same as the Water District where the member well <br />is located, with the majority of member wells located in Water Districts 1 and 2. The Water <br />District 99 identifier (ID 9903394) is recommended to represent the augmentation plan since the <br />member wells are located in four Water Districts. The number of wells originally in the WAS <br />subdistrict has been reduced by about 75 percent, according to Central's engineer. <br />Table 1 <br />Wells Associated with Central WAS Augmentation Plan (Plan ID 9903394) <br />Source Number of Wells <br />03CW99 Water Court application Unknown <br />HydroBase associations (Version 20060816)* 432 <br />Tied to acrea e in GIS Irri ated Acrea e Assessment** 401 <br />User interview About 120 <br />* Includes wells associated with Plan IDs listed in bullets above. <br />* * Subset of HydroBase association based on wells decreed for irrigation with decreed rates greater than 50 gpm and specifically <br />tied to lands in the 2001 Irrigated Acreage Assessment. <br />A number of possible explanations exist for the variation in number of wells tied to acreage from <br />the list of wells in HydroBase, including: <br />• Wells may be mis-located in the GIS coverage and therefore not assigned to irrigated <br />parcel(s). <br />• Wells are not active. <br />• Wells not decreed or decreed for less than 50 gallons per minute. <br />• Wells are decreed for other uses (e.g., augmentation, recharge, domestic, municipal, <br />commercial, stock water, etc.). <br />A-12 of A-106 <br />