FLOOD10418

• County: Boulder
• County: El Paso
• Community: Jamestown and Colorado Springs
• Title: State of Colorado 2004 Flood Documentation Report
• Date: 9/1/2004
• Prepared For: CWCB
• Prepared By: ICON Engineering, Inc.
• Floodplain - Doc Type: Flood Documentation Report

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Ftgure 1.20 - Fountain Creek Flow Gage Location in Security south of Cok>rado Springs, CO.
Map courtesv of the U.S.G.S. web,it.

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Funher hydrologic analyses were perfonned using available baseline data from NOAA
Atlas 2 in order to generate Intensity Duration Frequency (lDF) curves for rainfall events
within the City of Colorado Springs as well as the Town of Jamestown. Using the various
amounts of rainfall that were reported for the stonn event, onc could estimate the
frequency of the specific event. The results are summarized below in Table 1.1.

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Table 1.1 - Point Rainfall Frequency Analysis Surrmary

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I CoIonulll Sprill~~. CO JloUlll-'sfuWII. CO
Estirmtc:d Dul1ltil.ln (houn) 30 3.0
2-YR Total Precipitation (in.) US LOl<
S.YR Total Precipitation (in.) 1.92 1.43
lo..YR Total Precipitation (m.) 2.20 1.73
25-YR Totlll Precipitation (in.) 262 2.13
2-YR/30-minutc RainfaU Intensity (inchcsfhr) 1.29
Total Event Precipitations As Reported (in.) O.D. UK
2.49.
247
MtI..alTl.lm Reported RainfaU Intensity 1" m 1/2 hour
FJI t. EWnt Fn'lJu'IICJ (Jr) un ThMfI :z to l....~~ Than 2~ l....u ThMn 2 to uu ThIUI 5

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. MinilTl.lmand nllxinJ.Jmrecorded precipitation values reported by Rain Oleck.

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~2004