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<br />15 <br /> <br />DESIGN DISCHARGES BY OTHERS <br /> <br />Mr. Fred Bartel of the Bureau of Reclamation Flood <br />Study Group, said via telephone, that in 1964 they used a <br />50 year flood of 44,000 cfs and a 100 year flood of 48,000 <br />cfs for the design of a pumping plant at Silt. In 1970 <br />at Grand Valley (Palisades), they used a 50 year flood of <br />56,000 cfs and a 100 year flood of 63,000 cfs. Mr. Bartel <br />said that the gage records since 1949 were adjusted to <br />account for the effect that retention and diversion had on <br />the peak flow in the Colorado River. <br />The USGS "Water-Supply Paper' 1683", (6) Figure 19, <br />page 16 under Special Application gave a 50 year flood of <br />51,000 cfs through DeBeque Canyon. This paper contains <br />records through 1962 therefore does not include the effect <br />of recent dams. Homestake, Rifle Gap and Ruedi dams have <br />been built since then. <br />