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<br />ORICE llEPOU ON HAY-JULY 1973 <br />SNOWMELT FLOODS <br />IN THE <br />UPPEll COLOIlADO RIVER BASIN. COLOIWlO. <br />NEW MEXICO. AND GREAT BASIN. UTAH <br /> <br />1. Authority for aJld coutent of report. - This report covers the sno_ <br />..It floods that occurred in the Upper Colorado River Basin aJld the <br />Great !aaill durill& Hay. June ad July 1973. It was prepared penuallt <br />to the proviaioM of Ell 500-1-1 alld under authority provided by SPDCO-O <br />(6 Jul 73) 3rd Ind.. dated 27 July 1973 (baaic lenen SPUD-Il 6 July <br />1973. Subject: Post Flood Data Collectioll &Ild Report - 1973 Snowmelt <br />Ilunoff. Great s..in aJld Upper Colorado Baain.) The report pre..nts <br />1nfo~tlon on aJltecedent conditions. runoff. flood d....e and the effect <br />ofaxistill& structures on the floodwaters during the snowaelt period. <br />Abo included 18 1afo~tion on flood _rgency operattollS aJld rehablli- <br />tatioll work carried out by the Corps of Ragineers under cOlltinuillg <br />authoriU... <br /> <br />2. The str... syst.... flooded areas. urb&ll centers. principal high- <br />ways &Ild railroads. and other geographic detail are shOWll OD the General <br />Haps at the end of the report. <br /> <br />3. Descriptive data. - Descriptive physiographic. clt.&tological. alld <br />ecollOll1c data relaUve to the Upper Colorado and Great Basill Ile&ions <br />and their various hydrologic subregiOUT ,re contained in the appropriate <br />CoIIpreheDaiva rr_rk Study Reports. a <br /> <br />(a) I.efer to paragraph 46. <br />