FLOOD11637 - Laserfiche WebLink

Home Browse Search

Table 1- Summary Of Discharges (Continued) Lost Canyon Creek At the Mouth 72 600 1,700 2,500 Lower Cornett Draw (City of Cortez) At Confluence with Carpenter 0.57 -- -- 108 Wash Mancos River At the Town of Mancos 83 1,250 2,230 2,750 South Central (City of Cortez) At Confluence with McElmo 0.70 -- -- 506 Creek Upstream of Confluence with 20 -- -- 0 140 West South Central . At 7~ Street 0.14 -- -- 100 Walmart Tributary (City of Cortez) At Confluence with McElmo Creek 0.57 -- -- 301 At Main Street (Hwy 160) 0.24 -- -- 130 West Dolores River At the Mouth 168 2,300* 3,800* 3,820 West South Central (City of Cortez) At Confluence with South Central 0.30 -- -- 235 * Only the 1-percent annual chance storm was updated in the 2005 Dolores River Study. The p discharge for the 10-, 2-, and 0.2-Percent annual chance storms were based on gage data as de Town of Dolores, Colorado, FIS completed on September 29, 1989. 3.2 Hydraulic Analyses Analyses of the hydraulic characteristics of flooding from the riveri~ studied were carried out to provide estimates of the elevations of flo selected recurrence intervals. Locations of selected cross sections used in the hydraulic analyses are the Flood Profiles (Exhibit 1) and on the Flood Insurance Rate Maps (E: Water surface elevations for floods of selected recurrence inter computed through the use of the U.S. Army Corps of Engineers step- computer program (HEC-2) for Chicken Creek, Lost Canyon Creel portion of the Mancos River through the Town of Mancos. Wat elevations for floods of selected recurrence intervals were computed tl 4,500 4,420 11,500* ak ined in the ; sources - is of the hown on ubit 2). ~s were ckwater and the surface ~u~h the 12