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<br />~ <br /> <br />Page No. <br />02/14/91 <br /> <br />2 <br /> <br />Colorado Water Conservation Board <br />Floodplain Management Section <br /> <br />CHRONOLOGY OF FLOODS IN COLORADO <br /> <br />Flood <br />Da te Source <br /> <br />Community and/or <br />Stream Name Location <br /> <br />07/29/90 Rain Local Drainage Denver <br />08/06/90 Rain Brush Creek Brush <br />08/11/90 Rain Black Tiger Nederland <br /> Gulch <br />08/15/90 Thunderstorm Cherry Creek Denver <br /> <br />08/1'7/90 Rain <br /> <br />Irrigation Ditch Frederick <br /> <br />09/01/90 Rain <br /> <br />Unnamed <br />tributary of <br />Clear Crk <br />Black Tiger <br />Gulch <br /> <br />Georgetown <br /> <br />09/02/90 Rain <br /> <br />Nederland <br /> <br />12/28/90 Ice Jam <br />Release <br /> <br />Roaring Fork <br />River <br /> <br />Basalt <br /> <br />Damages <br /> <br />4.25 inches of rain fell in less than 2~ <br />hours. <br />Black Tiger Gulch a tributary to Boulder <br />Creek flooded after 2.5 inches of rain in 2 <br />hours. The 1989 Black Tiger Fire left the <br />area bare of vegetation. The road had never <br />been flooded before the 1989 fire. <br />Cherry Creek overflowed its banks near S. <br />University Boulevard during a thunderstorm <br />that dropped up to 2 nches of rain in <br />approximately 2 hours. <br />The drainage ditch was clogged and the sudden <br />onslaught of rain caused the water to burst <br />from the ditch. Flood water depth in the <br />town was up to 2 feet. <br /> <br />References <br /> <br />Denver Post, <br />07/30/90 <br />Denver Post. <br />08/07/90 <br />Department of <br />Highways Flood <br />,Summary, 08/20/90 <br /> <br />Denver Post, <br />08/16/90 <br /> <br />Denver Post, <br />08/18/90 <br /> <br />A mudslide occured in an unnamed tributary to Mark Sawyer, Clear <br />Clear Creek after 4 inches of rain fell in Creek County <br />2.5 hours. ( Approximately) <br />Approximately 2.5 to 3.0 inches of rain fell <br />in a two hour period causing Black Tiger <br />Gulch, a tributary of Boulder Creek. to flood <br />for the second time this season. The flood <br />carried trees, brush and rocks into the <br />roadway blocking traffic for three hours. 3 <br />inches of muddy water covered Highway 119 for <br />60 to 70 feet. <br />Am ice jam gaveway in Snowmass Canyon above <br />the town of Basalt. The 4 foot high ice <br />surge flowed through the town in <br />approximately 10-15 minutes hitting the town <br />between 3 and 3:30pm. There was no serious <br />propety damage reported. <br /> <br />Deapartment of <br />Highways Flood <br />Summary, 09/04/90 <br /> <br />Denver Post, <br />12/29/90 <br />