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<br />I- <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Chapter IV - 1997 Augmentation Replacement Sources <br /> <br />AGUA can provide augmentation water in 1997 from four sources: 1) consumptive use credits from <br /> <br /> <br />the Excelsior Ditch; 2) transmountain and other reusable water from the Board of Water Works of <br /> <br /> <br />Pueblo, Colorado; 3) transmountain return flow credits from the Southeastern Colorado Water <br /> <br /> <br />Conservancy District; and 4) reusable return flows from Colorado Springs. All of the water provided <br /> <br /> <br />from these sources is leased. A description of AGUA's interests in these sources is discussed below. <br /> <br />A. Excelsior Ditch <br /> <br />AGUA has an agreement to utilize diversions from 1,187 shares out of the total 3,333 shares in the <br />Excelsior Irrigating Company (35.61 percent) for augmentation replacements in 1997. The remaining <br />2,146 shares in the Excelsior Irrigating Company are unused at this time. Mr. Dick Evans provides <br />1,007 Excelsior shares for lease by AG UA and 180 shares are provided by Southwest Ready-Mix. <br /> <br />The Excelsior Ditch has two water rights with priorities of May 1, 1887 for 20 cfs and January 6, 1890 <br />for 40 cfs. The Excelsior Ditch diverts from the north bank of the Arkansas River in Section 36, <br />Township 20 South, Range 64 West, approximately four miles east of Pueblo, Colorado. <br /> <br />Diversion records from: 1) the Division of Water Resources for 1940 through 1985, and 2) records <br />from the Colorado Water Conservation Board for 1908 through 1938, show that the long-term <br />Excelsior Ditch diversions averaged 4,070 acre-feet per year between 1908 and 1985 (excluding <br />1939). During the pre-Compact period (1908 through 1947), the Excelsior Ditch average diversions <br />were 5,040 acre-feet per year and between 1948 and 1985 the diversions averaged 3,095 acre-feet per <br />year. Table IV-1 summarizes the annual diversion~ by the Excelsior Ditch. Diversions by the Excelsior <br />Ditch ranged from a low of zero acre-feet in 1977 10 a high of 9,934 acre-feet in 1948. Due to the <br />relatively junior nature of the water right priorities, the dry-year diversion of the Excelsior Ditch is zero <br />acre-feet. <br /> <br />The State Engineer has allowed AGUA to claim a 60.6 percent replacement credit on Excelsior Ditch <br />shares used for augmentation. The 60.6 percent is based on a ditch efficiency of 85 percent, a lateral <br /> <br />-7- <br />