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(replacement point). At Dillon Reservoir, the ramping guidelines call for <br />three hourly gates changes to adjust from 100 cfs (Silverthorne Level One <br />filing) and 50 cfs (normal minimum outflow). Likewise, the guidelines call <br />for three hourly gate changes to adjust from SO cfs to 100 cfs. This would <br />require gate changes from S p.m. to 11 p.m. and from 5 a.m. to 7 p.m. <br />• I don't know if the Bureau of Reclamation would make multiple daily gate <br />changes to pass the fluctuating inflow caused by the nighttime exchanges <br />through Green Mountain Reservoir. <br />• It is unlikely that fluctuating diversions at Dillon and replacements at <br />Williams Fork Reservoirs could be properly adjusted to river travel times to <br />avoid disrupting the natural flow of river and affecting downstream senior <br />water rights including any senior CWCB rights. <br />• Because of river fluctuations, it seems unlikely that the State Engineer would <br />approve a nighttime only exchange. <br />• The multiple daily gate changes required for nighttime only exchanges would <br />disrupt hydropower productions at Dillon and possibly Williams Fork and <br />Green Mountain Reservoirs. <br />• Multiple daily flow changes could have detrimental effects on the fishery <br />below Dillon, Williams Fork and Green Mountain Reservoir including the <br />fishery in B1ua River through Silverthorne which Denver Water has assisted <br />with habitat iinprovements and fisheries within the CWCB instream flow <br />segment below Dillon Reservoir. <br />3. I have reviewed Denver Water's water diversions published in Denver Water's <br />2003 annual report (DWD Exhibit 22). From 1994 - 2003, the Blue River accounted for 26% of <br />Denver Water's supply. Denver Water's use of Blue River water will continue to grow with the <br />increase in customers served by Denver Water. Denver Water already heavily relies up its <br />South Platte, Williams Fork and Fraser River supplies and in the future will drawn more water <br />from the Blue River to meet new water demands. <br />4. Attached for the CWCB's consideration is DWD Exhibit 8, which is the permit <br />for outflow to the Blue River from Dillon Reservoir. Denver Water is only required to bypass 50 <br />cfs or the inflow whichever is less. During times of drought, Denver Water can further reduce <br />the bypass. <br />5. I have reviewed the testimony prepared by Bill Bates and I share his opinions. In <br />addition, I would add that our Dillon operations have been in a state of flux since the change in <br />administration made by tne Division Engineer in 2004 concerning the determination of a Green <br />Mountain Fill. The Silverthorne RTCD should be subject to any new decree, if any, which may <br />be necessary to maintain Denver Water's ability to operate Dillon Reservoir as it has historically. <br />2