FLOOD10395 ‎(2)‎

• County: Montezuma
• Community: Dolores
• Stream Name: Dolores River
• Title: Dolores River near Dolores, Colorado, Flood Insurance Study
• Date: 5/1/2004
• Prepared For: Dolores
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Floodplain Report/Masterplan

1949, and 1952. Such events were includ.ed in the rainflood record, which then is not completely

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independent of snowmelt.

T:<lble 18
Comparison Table of 1 % Rainflood Peak Flows (cfs)
Dolores River below Rico,
Dolores River at Dolores, and Dolores River below Lost Canyon Creek
Estimated Peak Flow for 1 % Event (cfs)
Source Dolores River below Dolores River at Dolores River below
Rico Dolores Lost Canyon Creek
2004 Flood Insurance Study: Hydrology
Frequency Curve (Rain flood) 2,440 11,700 N/A
HMS Model 2,290 11,700 12,300
Frequency Curve (Snowmelt) 2,730 8,200 N/A
1976 Flood Hazard Information: Hydrology
(Reference 4-d) N/A . N/A 14,500
2000 USGS Report 99-4190
(Reference 4-m) 2,650 9,980 (I) N/A
IFrequency Curve
2003 USBR McPhee Report
(Reference 4-0) 2Frequency Curve N/A N/A 12,250 (2)
I All events (rain and snow) frequency curve
2 McPhee Reservoir 1 % Peak Inflow

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Table 19 presents a tabulation of rain flood and snowmelt frequencies for the 0.2%, 1 %,2% and

10% chance exceedence for Dolores River below Rico, Dolores at Dolores, and Lost Canyon

Creek near Dolores gage locations as see on Plates 12, 14, 16, 18, and 22. Table 20 is a summary

of Peak Flow 1 % Exceedence for the 2004 Flood Insurance Study, Dolores River near Dolores.

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