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<br />SEITIIIFOUR <br /> <br />Holvoke <br /> <br />4.2 STORM EVENT DATA <br /> <br />4.2.1 Precipitation Data <br /> <br />Data from the NOAA web site ("raw" data, which has not undergone Quality Control) indicates <br />that 0.57 inches fell on this date in less than one hour (the time frame was reported by Mr. Ron <br />Koberstein with the NRCS). <br /> <br />A comparison between this data and precipitation-duration-frequency curves (Figure 4.2-1 <br />developed from the u.s. Department of Commerce, NOAA Atlas 2, Volume III-Colorado) <br />indicates that the precipitation that occurred in this area is equivalent to less than a 2-year <br />frequency event. <br /> <br />Figure 4.2-1 <br />Precipitation-Duration-Frequency Curves for Holyoke, Colorado <br /> <br />Holyoke <br /> <br />6.0 <br /> <br />C 5.0 <br />~ 4.0 <br />o <br />~ 3.0 <br />c. <br />~ 2.0 <br />... <br /> <br />a.. 1.0 ~ <br /> <br />0.0 <br />o <br /> <br /> <br /> <br />t <br /> <br />---+- 2 <br />----- 5 <br />----.- 1 0 <br />25 <br />---*-100 <br /> <br />5 <br /> <br />10 <br /> <br />15 <br />Duration (hr) <br /> <br />20 <br /> <br />25 <br /> <br />30 <br /> <br />4.2.2 Flow Data <br /> <br />No flow data was found from the USGS surface water monitoring program or other sources <br />along Frenchman Creek or other creeks in the area. <br /> <br />4.3 EXTENT OF FLOODING <br /> <br />Investigations found that no flooding was reported for this event. The damage listed below was <br />caused directly by the precipitation in the form of hail. <br /> <br />4.4 STORM DAMAGES <br /> <br />Hail and high winds from the event defoliated sugar beets and corn and shelled beans. Per a <br />USDA report, the storm damaged crops throughout the indicated area (Figure 4.1-2) of Phillips <br />County. Crop losses were estimated by the Farm Services Agency (USDA): <br /> <br />URS <br /> <br />T:\PROJ ECTS\6844888 _ CWCB _FLOOD_DOC _RPTS\SUB _00\6.0 _PROJ_DELlV\REPORT\FI NAL REPORT .2. D0020-MAR-021 \ 4 - 3 <br />