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<br />. <br /> <br />'. <br /> <br />. <br /> <br />e <br /> <br />'0 Q()() <br />. . 4tr. <br /> <br /> <br /> <br />s,tand;li',d pro.,iect.t'1bod. ~ A study was matte of' majoi' st.orms bf <br /> <br />recbtd in the gsHSral vicinit.yo:f Ti'inidad, to determine which of the <br />stormS would produce the lai'gest .flood at Tripidad when transpo~ed over <br />the upper Purgatoire River basin. It was 'found that the storm of <br />Juhe 2-6; 1921, whiCh centered near Pueblo, Colorado; had. produced pre~ <br />cipit&tion of higher intensity than any storroof record within a radius <br />of 100 miles oft.he area, !ilidthe aecondarycenterwhich occurred. near <br />Fioreribe, Colorado; wast.hIi type Of storm that could be expect.ed to 6c~ <br />cur oVer the upperPtirgatol:fe River basin, Oth~r st.orms 6frecofd in <br /> <br />. . <br />the RockY M6uht!liii'Regioti would be SCJ modified by the topography arid <br />meteofological cliaraoteristicsihherent in ttanspositi,on to the J?u:r'gli.;. <br /> <br />. . <br />f.6:LJ:.el3asiri that they would become less critical than the st6tm of <br /> <br />juhe 192H <br /> <br />41. . Th~ secondary center of the June 2~, 1921 storm was trans'" <br />posed; without rotation; 85 miles. south-southeast and Cel1tered.>near <br />Weston, Colorado, to give the maximum average preCipitation. over the <br />Ptirgato1i'ewatershed above Trinidad. The standard project flood was <br />derived from this storm, using an infiltration loss rate of 0.49 inch <br />per houri as indicated bY infiltration studies made of other wate:t'shed.1l <br />having similar charat1:.ettstics. This derivation Hould produce a :flood. <br />with an estiiilated peak Clischargeof m6)000 cubic feet per Second and 11 <br />volume of 67;800 acre "'feet , at Trinidad. The' standard prdject flood <br />peak di~charge is 233 percent greater than the peak of the maximum flood <br /> <br />of record. <br /> <br />. · EXTENT AND CHAAAtTER OF THE FioobED AilEA <br />42. nellneationof,rJ:ood,p);qins.:. Thefiood plitlli of the 1904 <br />flood Has delineated nofu thEi high water matks establiSheci bY. the Gait.;: <br />Idg:lc!i1 Sift,ve;\r iinmedi!iteiy a:ftef 'hlis fi60d~ All 'known high Hat'ef marks <br />fd:i:- the 1904 iihd 1925'flddds wefe1dbllted ~t the timEl :Lnsti'iJifiental <br />!JurVeys were made of the flooded I1r~1ii The ridbd plaihs tit t.he 1942 and <br /> <br />15 <br /> <br />.\>- <br /> <br />