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<br /> Peak 'Flow (cfs) Peak Flow (cfs) <br />Year Delta GaRel Date Colona Ga2e2 Date <br />1921 __3 __4 5,1405 June 13-14 <br />1927 2,880 June 29 3,400 June 28 <br />1938 __3 __4 3,390 June 22 <br />1941 3,730 May 5 __3 __4 <br />1944 3,340 May 16 __3 __4 <br />1947 3,500 October 15 __3 __4 <br />1957 __3 __4 3,300 June 29 <br />1975 __3 __4 3,360 July 4 <br />1984 5,800 May 15 --4 --4 <br /> <br />IMeasured at u.s. Geological Survey stream gage No. 09149500 at the City of <br />Delta, Colorado <br /> <br />2Measured at u.s. Geological Survey stream gage No. 09147500 at Colana, <br />Colorado <br /> <br />3Flow Not Outstanding <br /> <br />4Not Available <br /> <br />SEstimated Mean Daily Flow, 4,080 efs <br /> <br />Historical flooding in the Uncompahgre Valley described in <br />available news articles has damaged or destroyed railroad track <br />and embankments, road and railroad bridges, roads, diversion <br />structures, and buildings and their contents. Inundation of <br />agricultural property has eroded farmlands; damaged and destroyed <br />crops and irrigation systems; reduced soil productivity due to <br />increased salinity; and deposited sand, silt, and debris on <br />cropland and pasture. Railroad and highway traffic has been <br />disrupted, public utilities damaged and destroyed, homes <br />evacuated for as long as several days, and cattle moved to higher <br />ground to protect them from the possibility of drowning. <br /> <br />On Minnesota Creek, the flood of record, as measured at <br />U.S. Geological Survey stream gage No. 1340 located approximately <br />4.5 miles upstream of Paonia, occurred on July 10, 1936, with a <br />peak flow of 356 cfs. Based on the results of this study, the <br />1936 flood had an estimated recurrence interval of approximately <br />5 years at the gage site. Peak flows of the larger historical <br />floods on Minnesota Creek are shown below (References 7, 8, <br />and 9). <br /> <br />9 <br />