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. 598 UNIVERSITY OF COLORADO LAW REVIEW [Vol. 59 least equal depletions to the stream at any time when a senior priority would be injured by the unavailability of that water. The water court essentially adopted the analytical approach sug- gested by Fort Morgan, The decree requires the well owners to report crop and acreage information each year by May 1st. Fort Morgan then is to analyze the "net groundwater extractions" applicable to each welL" Also by May 1st, Fort Morgan is to "project the net effect on the South Platte River in the upcoming year resulting from prior and projected pumping and from prior recharge operations under Fort Morgan's system, "'6. Monthly updates are required. If the recharge accretions are inadequate to prevent material in- jury, Fort Morgan is committed to use supplies from its Jackson Lake Reservoir or, if necessary, to bypass diversion of its direct flow rights.77 Recharge credits beyond that needed to offset depletions may be used by Fort Morgan for other purposes, or they may be sold, The decree provides for retained jurisdiction for five years to assure no in- jury to vested water rights, M stated in the decree: This plan for Augmentation will allow the [Fort Morgan] wells, . . to be pumped at times and in amounts which would not otherwise be permitted under Colorado law. The Plan for Augmentation, if operated and administered in accordance with the Decree entered . herein, will prevent injury to vested water rights or decreed condi- tional water rights by replacing out of priority depletions resulting from the consumptive use of water diverted from the wells. . . .78 In summary, the Fort Morgan approach involves full replacement of well depletions to the stream, primarily by means of an off-irrigation season recharge program, C. Central Colorado Water Conservancy District - Groundwater Management Subdistrict The Central Colorado Water Conservancy District (CCWCD) was formed in 1965 with the objective of helping provide water sup- plies to members within the district boundaries (see Figure 4), The CCWCD encompasses the area along the South Platte River from 75. Two methods are provided. If actual well pumping is measured then the net extraction is to be based on 65 percent oftbe total amount pumped. lfpumping is not measUrN then the groundwater use is to be calculated based on estimated crop requirements less estimated deliveries of surface water. Evaporation J05St$ from sprinkler systems are assumed to be five percent of water use. Fort Morgan Decree. supra note 66. at 5. 76. Id. at 6. 77. Credit for releases of reservoir water is specifically limited to account for historic use constraints. 78. Fort Morgan Decree, su.pra note 66. at 3. ~ i ~ " . , ,. t988] . COLORADO LAW OF "UNDERGROUND WATER" 599 Poudre River ~ ~ FIGURE 4, THE CENTRAL COLORADO WATER CoNSERVANCY DISTRICT/GROUNDWATER MANAGEMENT SUBDISTRICT