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<br />Flood Summary for the Denver-Metro Area <br /> <br />July 19 was the beginning of an 18-day onslaught of rain that culminated in <br />flooding at Goldsmith Gulch in south Denver and a new storm that hit <br />central Jefferson County. TItis storm produced 1.85 inches of rain in Golden. <br />The National Weather Service issued a flash flood warning for Golden and <br />Pleasant View; however, the storm was isolated and caused only minor flood <br />damages. <br /> <br />On July 28, while Fort Collins was experiencing its devastating flash flood, <br />Goldsmith Gulch had high flows for a second consecutive day, setting a new <br />peak record of 2,040 cfs. On Goldsmith Gulch, downstream of Yale Avenue <br />(Figure 3.0-1), flow was classified as a 10-year event. In fact, according to a <br />hydrology model, the discharge in this area neared the 50-year mark. <br /> <br />~ <br /> <br /> <br />Figure 3.0-1 Iliff Stormwater Detention Basin on Goldsmith Gulch in Denver on <br />July 27, 1997 <br /> <br />Also on this date, heavy rains caused localized flooding in other parts of <br />Denver and Aurora, affecting roads, parking lots, and basements. In fact, <br />several roads were washed out in Aurora. <br /> <br />Evening rains fell again on July 28, causing record flows at the Sand Creek <br />gage, 4.4 feet of water to overtop the pedestrian trail at Sand Creek Park near <br />Interstate 225, and flooding of a magnitude to float a car in a parking lot at <br />Quebec Street and Leetsdale Drive in Denver. <br /> <br />July 30 brought yet another flash flood warning; this time for Boulder Creek <br />and small streams in northern Jefferson County. The rains on this day <br />caused landslides in the mountains along South Boulder Creek, but did not <br />instigate major stream flooding. However, in Aurora, the Utah Park <br /> <br />d479/chap3.doc 08/13/98 <br /> <br />3-2 <br /> <br />l <br />