FLOOD01853

• Designation Number: 356.01
• County: Prowers
• Community: Holly
• Stream Name: Arkansas River, Wild Horse Creek
• Title: Floodplain Information Report - Town of Holly
• Date: 6/1/1994
• Designation Date: 7/1/1994
• Floodplain - Doc Type: Floodplain Report/Masterplan

Table I - Flood Frequencies
Holly Flood Control Proje<:t, Holly, Colorado
(From U.S. Army Corps of Engine(:rs Detailed Project Report,
Appendix 2 - Hydraulic Design, March 1977)

Recurrence
Interval
Years

10
25
50
100
SPF'
5004
Max Record

Wild Horse
Creek
c.f.s.

9,700
17,200
25,400
36,200
62,000
74,000
22,000'

Coincident
Ark. River
c.f.s.

Total
c.f.s.

Arkansas
River
c.f.s.

23,000
40,000
58,000
82,000
160,000
170,000
200 0006
,

'The ~:tandard Project Flood for Wild Horse Creek at Holly is approximately a 400nyear flood
based on t xtrapolation by Board staff of the Corps' Peak Frequency Curve for Wild Horse Creek
at Holly. The Standard Project Flood for the Arkansas River at Holly is approximately a 450-
year flooc based on extrapolation by Board staff of the Corps' Peak Frequency Curve for the
Arkansas River at Holly.

2,800
4,700
6,600
9,000
14,700

12,500
21,900
32,000
45,200
76,700

4The 500-year flood values were extrapolate:d by Board staff using the Peak Frequency
Curves developed by the Corps.

'This maximum flow of record occurred in August 1935 largely as a result of a darn failure.
The second largest flow occurred in June 1965 and peaked at 10,600 c.f.s.

6The maximum flow of record occurred in June 1965.