FLOOD02838

• County: Douglas
• County: Arapahoe
• Community: Greenwood Village, Aurora
• Stream Name: Cherry Creek
• Basin: South Platte
• Title: Probable Maximum Precipitation Study for Cherry Creek Reservoir - Final Report
• Date: 8/1/2003
• Prepared For: CWCB
• Prepared By: CWCB
• Floodplain - Doc Type: Project

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rainfall over Cherry Creek drainage basin compared to the site-specific PMP values from
the NWS study. Determination ofthe change in the Probable Maximum Flood (PMF)
using these results is beyond the scope of this PMP study,

Explicit factors and procedures that produced the A W A team results are:

I. Use of Colorado storms

2. Storm maximization using HMR 55A maximum dewpoint values

3. Storm transpositioning using HMR 55A maximum dewpoint maps

4. Elevation and barrier adjustments to account of elevated terrain effects

5. Critical storm centering and orientation over the Cherry Creek basin

6. Depth-Duration curve envelopment

7. Depth-Area curve envelopment

The extreme rainfall storm centers used in this study are:

1. June 3-4, 1921 - Pueblo Center (Penrose Storm)

2. May 30-31, 1935 - Zone A Centers

3. May 30-31, 1935 - E Center

4. May 30-31,1935 - Hale Center

5. June 16, 1965 - Plum Creek Center

6. June 17, 1965 - Falcon Center

7. June 18, 1965 - Holly Center

8. July 3,1981 - Frijole Creek Center

9. July 27-28, 1997 - Fort Collins Center

10. July 28-29, 1997 - Pawnee Creek Center