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I. SOUTH PLATTE RIVER BASIN <br />A. Population Estimates. As part of getting Governance Committee approval for its <br />Future Depletions Plan in 1998, Colorado provided to the Governance Committee an <br />estimate by the Colorado State Demographer of the population of those portions of <br />the following Colorado counties located within the South Platte River Basin, as of the <br />effective date of the Cooperative Agreement (1997), in the following regions: <br />1. Northern Region -- Boulder, Weld, Larimer, Washington, Morgan, <br />Sedgewick, Logan, Phillips (701,470) <br />2. Central Re ion -- Denver, Jefferson, Adams, Clear Creek, Gilpin, Park <br />(1,766,207) <br />3. Southern Re ion -- Arapahoe, Douglas, Elbert (194,602) <br />Said estimate is included in Colorado's Future Depletions Plan Interactive Tool and <br />will be the "Population Baseline." At the same time, Colorado also provided to the <br />Governance Committee an estimate by the Colorado State Demographer of the <br />amount by which the population of each region was expected to increase over the <br />Population Baseline by the end of the initial reporting period, which was 2002. Such <br />increase was to be considered the projected "Population Increase." Because of the <br />extension of the Cooperative Agreement to July of 2005, Colorado will report, by the <br />end of 2004, a new "Population Increase" estimate for the initial reporting period, <br />which will now end in 2007. At the end of each reporting period, Colorado will <br />provide to the Governance Committee an estimate by the Colorado State <br />Demographer of the actual population in each region (which shall be the Population <br />Baseline for the next succeeding reporting period), and an estimate of the projected <br />Population Increase for the next succeeding reporting period. <br />B. Water Use and Effect Assumptions. Assumptions concerning per capita water <br />use, supply source mix by region, and accretive/depletive effects of each supply <br />source (including monthly distributions of said effects), set forth in this paragraph and <br />the table below, represent reasonable estimates at the outset of the program, and may <br />be modified by the Governance Committee based on information made available to <br />that Committee by Colorado or others. The gross per capita water requirement in the <br />South Platte River Basin in Colorado will be assumed to be 0.27 af/yr, with 35% <br />consumptive use assumed for all municipal purposes, and 45% consumptive use <br />assumed for agricultural irrigation purposes. It is anticipated that new water related <br />activities within the three regions will be from six sources of supply to serve the <br />Population Increase, each with a different depletive or accretive effect on flows in the <br />South Platte River. The three regions will develop the six sources of supply in <br />different combinations. It will be initially assumed that the sources of supply for new