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<br />Creek, 1 mil,~ south of Franktown, and by the Douglas County line on the east. Unofficial <br />rainfall amounts varied from 1 inch to 3,5 inches, occurring in about 2 hours. An estimated <br />peak discharge if 8,700 cubic feet per second discharged out of Bayou Gulch. The <br />discharge on Cherry Creek, 3 miles north of Parker, was estimated to be 17,000 cubic feet <br />per second. Although no damages were experienced in Denver, this was considered a <br />major flood I'or the upstream part of the basin, <br /> <br />Flood of August 1933. The storm of 2 and 3 August 1933 occurred over a 175 square <br />mile area upstream from Franktown. Unofficial rainfall amounts varied from 3 to 9 inches <br />and occurred over a 9-hour period between 6 p.m, on 2 August and 3 a.m, on 3 August. <br />The most intense activity of the storm occurred between 9 p,m. and 10 p.m. Waters, in the <br />then existing, Castlewood Darn and Reservoir, reached the spillway crest at about 11 p.m. <br />The inflow was estimated at 35,000 cubic feet per second. Water overtopped the crest of <br />the darn anclthe structure failed at about midnight. The sudden release of water caused <br />a flood wave to move down the valley. The peak discharge is estimated to have ranged <br />from 126,000 cubic feet per second downstream from the dam to about 16,500 cubic feet <br />per second near the South Platte River. The Cherry Creek Flood Commission estimated <br />the damages to be about $1,000,000; approximately $200,000 of this total occurred <br />upstream fmm Denver. This flood caused additional economic effects in the Cherry Creek <br />basin. Loss of the dam cut off water supplies to about 3,000 acres of land. The basin <br />suffered a Sl9vere recession and many families moved from the area. <br /> <br />Flood of August 1945. A large storm mass moved into southeastern Colorado on 5 <br />August 194ij, and extended over the Cherry Creek basin. Unofficial rainfall amounts varied <br />from 2 to 5 inches. Severe flooding occurred along Cherry Creek in the Franktown - <br />Parker area. The gaging station at Melvin recorded a peak discharge of 10,700 cubic feet <br />per second. Total damages were estimated to be $200,000. <br /> <br />Flood of June.l965.. On 16 June 1965, a major storm centered over the Plum Creek <br />and Cherry 'Creek basins. Rainfall amounts, reported by unofficial sources, ranged up to <br />10 inches. Most of the rainfall occurred within a 3-hour period. Peak discharges along <br />Cherry Creelk were 1,000 cubic feet per second upstream from Franktown, 39,900 cubic <br />feet per sBOJnd near Melvin, and 58,000 cubic feet per second at Cherry Creek dam. An <br />estimated pllak flow of 14,100 cubic feet per second discharged from Piney Creek, a right- <br />bank tributalY of Cherry Creek. During the evening and night of 16 June, the Cherry Creek <br />reservoir impounded a flood which had a volume of 16,000 acre-feet. Of the 18 small <br />darns constructed by the Soil Conservation Service in the upper Cherry Creek basin <br />between Franktown and Parker, 3 were filled. Two of these were subsequently overtopped <br />and sustain,;l(j erosion damage. The remaining 15 structures were outside of the area of <br />high intensity rainfall and received only moderate runoff. The heavy runoff caused major <br />flooding along the main stem of Cherry Creek from the vicinity of Franktown to the Cherry <br />Creek reservoir. About 2,720 acres were flooded, Most of the bridges across Cherry <br />Creek were either damaged or destroyed. one life was lost during the flood on Cherry <br />Creek. Flood damages totaled $1,306,000. <br /> <br />Colorado Flood <br />Hydrology Manual <br /> <br />4.18 <br /> <br />a:w=r <br />