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August 10 - The community of Lyons at the confluence of North and South St. Vrain Creeks was impacted by floodwaters on this date, 3 to 3,25 inches of rain fell in less than 45 minutes during the evening hours, Major damage was incurred by public and private properties, including the implosion of a foundation wall, undermined and failed pavement and damage to existing storm drainage facilities. Storm water conveyed 20-28" stones and peeled new portions of asphalt road off its base. Winds associated with the storm collapsed a house under construction, The August 10 storm also affected most of the Denver metro area, Rainfall of almost 2 inches in I hour was recorded at Red Rocks Amphitheater which equates to a 25-year storm event. This was the heaviest rainfall recorded by UD&FCD in 1994. The UD&FCD also recorded the highest discharge in Cherry Cn:ek in four years at Wazee Street (2,350 cfs). Street flooding and intense rainfall were common throughout the regIOn, August 10-11 - A heavy, slow moving thunderstorm system d(:veloped near Virginia Dale northwest of Fort Collins this evening where more than 5 inches of rain was reported, It resulted mostly from tropical air from the Pacific Coast meeting a stationary cold front over Colorado's mountains, Storms erupted almost spontaneously throughout the late evening from Livermore southward to Denver. The heaviest rainfalls were reported along the lowest foothills and hogbacks from Lyons northward, Se:verallocations received 3" rainfall totals, The community of LaPorte was especially hard hit. Area roads were washed out or inundated, The road was washed out from Livermore to the Red Feathers Lake area, ~ _/ ~, I -_.~ <l1'N ~ '" ~ '. Fort CoI1i~-Loveland area cnla.-gemcnl orlllc 10 Augus\ 1994 stann 1110--5 inch il\Cfcmcnu. --~---=::.-._---._----------------=~~; RCllionalllorm lOtals [or 10 AUllulll994 lfl OJ inch incrcmocnu 9