FLOOD04641

• County: Denver
• Community: All
• Stream Name: All
• Basin: South Platte
• Title: Proposed Hydrology for use in Hydraulic Analysis of FEMA Flood Studies and Restudies
• Date: 9/1/1989
• Prepared For: State of Colorado
• Prepared By: Resource Consultants
• Floodplain - Doc Type: Educational/Technical/Reference Information

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R€~OURC€ CON~UlTI\NT~ INC

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TABLE 14.2 -=- SUMMARY OF CC BASIN PARAMETERS

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DRArNACE AREA CURVE NUMBER TIME OF
SUBBASIN ll'1uare mUlli CN CONCENTRATION . Ie
1 0.48 67 0.58
2 0.17 67 0.38
3 0.13 70 0.37

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Peak discharge results for the hydrologic discharge points
shown on Figure 14.1 are presented in Table 14.3. The 100-year
discharge of 710 cfs at point CC 3 is considered reasonable
when compared to the 61,0 cfs value obtained from the most
recent study by the CWCB and the 660 cfs value from the earlier
CASEY study.

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TABLE J4.3 -=- SUMMARY QE ~Q PEAK DISCHARGES BY RCI

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DRAINAGE AREA PEAK DISCHARGES(l) icfs)
LOCATION (square miles1 10 YR 50 YR 100 YR 500 YR
CC 1 0.48 180 390 480 830
CC 2 0.65 220 500 620 1,100
CC 3 0.78 250 570 710 NA(2)

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(1) These values result from the 2-hour AMC III storm.
(2) The SOD-year discharge was not determined for points outside the
study reach

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15.0 DIRTY WOMAN CREEK HYDROLOGY

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15.1 Watershed Description

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Dirty Woman Creek is located due east of the town of Monument,
Colorado (22 miles north of Colorado Springs). As shown in
Figure 15.1, the maj ori ty of the 5.0 square mile watershed lies
east of Interstate 25. Flow in the stream is In a
southwesterly direction; it accumulates in several small
tributaries before consolidating into a sIngle channel just
prior to crossing under Interstate 25.

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The highest elevation for the watershed is just over 7,500
feet. The low poInt at the western outfall is 6,800 feet.
Slopes "ithin the basIn range from just over 8% at the higher
elevations to 3 to 4% in the flattest areas. Soils are
predominantly a loamy sand with rapid permeability. They are
hydrologically categorIzed as type "B" for the entire basin.

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Development In this "atershed is primarIly residential.
Individual lots are large, ranging from 1 to 5 acres over much
of the basin. There Is a substantial amount of open space
throughout, part of which is attributed to the Woodmoor Golf

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