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North Fork Gunnison 1/18/2006 Page 4 Williams Creek Total . 2,372 330,556 14 1,518 15 1,639 29 3,157 Future water demand estimation Water use was estimated as a function of land use and compared to population-based water demands. The number of parcels of various sizes (< 1 acre, > 1 acre to 10 acres, >10 acres to 35 acres, and> 35 acres) were counted by land use type to assist in estimating future water use. Future water use was estimated by assuming parcels greater than 35 acres will be subdivided into 35 acre parcels. . Current irrigated lands and consumptive use estimates were taken form Colorado Decision Support System GIS coverages and Statemod model results. And are summarized in Table 2. Decreed and undecreed water use was also considered in this analysis by incorporating estimated existing water uses in the North Fork of the Gunnison River basin that are in need of augmentation water (Table 2). The estimated existing water uses provided by the Division Engineer's Office do not include irrigation rights, only springs and ponds used for domestic, stock and evaporation uses. Table 2 - North Fork subbasins irrigated lands consumptive use (CU) summary . Area acres 65,490 62,243 154,263 15,499 21,044 9,645 2,372 330,556 535 42 4,696 1,632 69 33 22 7,029 Projected Consumptive Use water demands A spreadsheet model was developed with the GIS data to calculate the projected CU water demand under various assumptions. On December 14, 2005, a conference call was held with CDM and CWCB staff plus Wayne Schieldt, Assistant Division 4 Engineer, Dave Kanzer, Colorado River Water Conservation District and Mike Pelletier, Gunnison County Planner. Preliminary model results were reviewed and changes in model assumptions proposed for the ultimate build out demands of the subbasins. The following summarizes the revised . S:\SWSI 2\NorthJor1<\finaLmemoldeliverableOl1606\CWCB N For1< 1-17-06,doc