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South Platte Basin Roundtable Technical Meeting #2 Meeting Summary . Another BRT member noted that there are recreation opportunities associated with most water uses, even agriculture, from both its open space characteristic and wildlife habitat. Demand Proj ections The preliminary results of demand projections, both statewide and specific to the South Platte River Basin and its counties, were presented by Kelly DiNatale. Kelly also briefly reviewed the methodology used to develop M&I, agricultural, and environmental and recreational water demands for the 2030 planning year. Demand projection information developed under SWSI will be posted to the SWSI web site (www.cwcb.state.co.us). Feedback from the BRT members follows. . One BRT member voiced a concern over the effectiveness of low-flow plumbing fixtures in reducing demands. . Another BRT member pointed out that the Metropolitan Water Supply Study (Table 3) showed a higher per capita use than the preliminary SWSI numbers. . SWSI team members clarified that the per capita estimates were based on 2000 usage, in a year of approximately average hydrology. A BRT member stated that the timing of rain events (e.g., weekend vs. weekday) tends to lead to significant variation in per capita demand from year to year. . It was clarified that the projected M&I increase in the South Platte Basin of 4S8,OOO AFY is the gross demand increase, not consumptive use. . SWSI team members pointed out that the power needs beyond the planned Xcel power plant (now slated for construction in Pueblo by around 2009) will create additional demand for water, and these water demands could occur in the South Platte Basin. . A BRT member noted that cities at or near buildout may see their per capita usage affected by the addition of more commercial/ industrial users without residential increases. . SWSI team members were asked to clarify whether the 47,227 AF of demand for Denver is for Denver County or the Denver Water Service area. . It was noted that the new Calpine power plant northeast of Denver was inaccurately placed under 2000 self-supplied demand; the plant is just now being built, so it would not be reflected in 2000 demands. . A BRT member inquired about estimates for agricultural demands; SWSI team members pointed out that water supply limited basins are not necessarily assumed to be water-short. SWSI team members will clarify how the Decision Support System (DSS) handles the case when there's an irrigation need but the user chooses not to irrigate. SWSI team members will also clarify what triggers the Water Supply Limited designation (e.g., if the demand is 1 day prior to supply being available, is it considered Water Supply Limited?). . It was noted that the South Platte Basin's historical demand period of record will improve upon completion of South Platte DSS project. . A BRT member noted that the total irrigated acreage will decrease starting now because many wells aren't pumping due to competition for augmentation water both between agricultural users and between agricultural and M&I. In addition, reuse of return flow by M&I providers is reducing available supply for downstream rights. It was suggested that CDIVI 4 South Platte BRT Mtg #2 Summary.doc 4/16/2004