Colorado's Plan for Future Depletions (2)

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4. an estimate of the projected Population Increase for the next succeeding reporting period; 5. estimates of the net accretive/depletive effects and Cumulative Effect for the next reporting period; and 6. net changes in irrigated agricultural acreage, using readily available data. Colorado will also submit annual information reports to the Governance Committee estimating population increase in each of the three regions, and describing water sources used to supply new water related activities including type of water source, works used and water quantities supplied. Colorado will promptly report to the Governance Committee any new information that significantly affects assumptions relied upon in this Program. E. Determination of Cumulative Effect - Initial RenortinQ Period. Within 90 days after the inception of the Program, Colorado will provide to the Governance Committee a calculation of the average monthly distribution of the Cumulative Effect for anticipated water related activities in the South Platte River Basin in Colorado for the lnitial Reporting Period. The calculation will be based on the projected Population Increase for that period, and the water use and transit loss assumptions described above or as may be modified by the Governance Committee. The Cumulative Effect as approved by the Governance Committee will determine the mitigation measures that will be undertaken by Colorado during the Initial Reporting Period. F. Determination of Cumulative Effect -- Subsepuent RenortinQ Periods. Colorado will monitor actual water use and development in the South Platte River Basin in Colorado beginning July 1, 1997. At the end of the Initial Reporting Period, and at the end of each Subsequent Reporting Period, Colorado will report to the Governance Committee for its review and approval any adjustments in the Population Increase and in the Cumulative Effect for that period. Such adjustments will serve as the basis for calculations for the next succeeding Reporting Period. Any resulting increase or decrease in Cumulative Effect will be added to or subtracted from the Cumulative Effect to be mitigated in the next succeeding Reporting Period. G. Mitieation of Cumulative Effect. The signatories assume that the Cumulative Effect for any annual period is expected ta be a mix of net accretions during the fall, winter and spring period, and net depletions in the late-spring to mid-summer period, resulting in an estimated total seasonal net depletive effect on an order of magnitude of less than 1,800 af/yr for each 100,000 additional people in the South Platte River Basin in Colorado. Based on these assumptions, Colorado wiil, in each Reporting Period, undertake such re-regulation projects within Colorado as are necessary to shift water flows at a point upstream from the Colorado-Nebraska state line and downstream from the last diversion in Colorado, from periods of net accretion to periods of net dep(etion. The re-regulation projects divert water in priority through existing ditch head gates.or welts downstream of Colorado's Washington County line. After diversion, this water recharges the alluvial aquifer of the South Platte River. Colorado will locate the recharge areas the distance necessary from the South December 7, 2005 Colorado Dep/etions Plan