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LAWMA even in dry years. The Keesee water rights also include Priority No. 1918-4 for 15.0 cfs <br />with an appropriation date of September 3, 1893 and the Keesee Ditch has an Article II Storage <br />Account in John Martin Reservoir which is allocated conservation storage water under the 1980 <br />Operating Plan for John Martin Reservoir on an annual basis. <br />B. Historical Consumptive Use of the Keesee Water Ri�hts. <br />Historical consumptive use of the Keesee Ditch was derived for this study using the <br />H-I Model's output and efficiency factors for the period of 1950 to 1994. Values obtained from the <br />1996 "Compact Run" version of the H-I Model include acres, simulated river headgate diversions, <br />total crop evapotranspiration and effective precipitation. As shown in Table 2 the average annual <br />consumptive for all of the Keesee water rights was 3,201 acre-feet (1,600.5 acre-feet for one-half of <br />the Keesee water rights) during 1950-94 with a firm annual consumptive use of 3,520 acre-feet <br />(1,760 acre-feet for one-half of the Keesee water rights) in 1954 and a maximum consumptive use <br />of 4,294 acre-feet (2,147 acre-feet for one-half of the Keesee water rights) in 1974. The average <br />annual consumptive use of 3,522 acre-feet (1,761 acre-feet for one-half of the Keesee water rights) <br />during 1980-94 represents the historical operations under the 1980 Operating Agreement for John <br />Martin Reservoir. <br />C. Inflows to the Keesee Article II Stora�e Account. <br />As previously mentioned, the Keesee water rights have storage available in the <br />Article II Account System within John Martin Reservoir and one-half of the deliveries made to the <br />Keesee Article II Storage Account would be available for LAWMA to use as a replacement source. <br />Inflows to the Keesee Article II Storage Account in John Martin Reservoir are shown on page 3, <br />column 10 of Table 3. This water may be delivered to the Offset Account at LAWMA's discretion <br />or released to the river for replacement purposes. The average annual consumptive use factor of <br />64.3%, which is based on the average monthly water balance for the Keesee water rights and was <br />agreed to in Case No. 02CW 181 for LAWMA's change of the first-half of the Keesee water rights, <br />would be used to deternune the replacement credits for that water. <br />D. LAWMA's Need for Additional Replacement Water. <br />As the CWCB is aware, the final phase of the Kansas v. Colorado case is nearing <br />completion. The Kansas v. Colorado case has forced LAWMA to take a closer look at its <br />replacement water sources and the adequacy of those sources for meeting LAWMA's replacement <br />requirements especially during a series of dry years such as the ones recently experienced in <br />Colorado. The Special Master has made it clear that LAWMA's continued and expanded use of the <br />Offset Account in John Martin Reservoir would be critical to insuring Colorado's compliance with <br />the Arkansas River Compact now and in the future. Colorado and Kansas have recently reached an <br />agreement to not terminate the Offset Account for 5 years that requires Colarado ground water users <br />like LAWMA to use the Offset Account as the primary mechanism of replacing depletions to usable <br />stateline flows, subject to certain conditions and exceptions. Furthermore, the extreme state-wide <br />7 <br />