FLOOD03485

• County: Denver
• Community: All
• Stream Name: All
• Basin: South Platte
• Title: Comparison of Estimated Flood Peaks with Historic Floods
• Date: 1/1/1986
• Prepared For: State of Colorado
• Prepared By: USDOI
• Floodplain - Doc Type: Educational/Technical/Reference Information

4 l~;'
:iHC'
::;~C c
34tJ C
:,2(: "
30t' C
2Re
"
u 250
u 2<12 l
G' I
Q L
22("
,
C" 20~ L
,
'5 L
S 18C I_
II 150
(f) l
- 140 I
"- 120 t
0
w 100
a: l
a: 80
50 ~
'"
,
20 I
"
0
0 10
Piate 19

P[RK RRTE OF FLOW~3820e~ cf$
MAXIMUM 48-HR VOLUME~2234se ac-ft

!~
I

BURERU OF RECLRMRTION
RRBUCKLE PROJECT,OKLRHOMR
ARBUCKLE DRM

MRXIMUM PROBABLE FLOOD

HITH 100 YEAR ANTECEDENT fLOOD
REH JUNE 3 1981

HISTORIC FLOOD PEAK~ 105000 CFS
OCTOBER 8,1970 27% OF PMF PEAK

__I

_L.-._ '---.---t.-

.....1..--__~_L_

._ _.1

120

13a

20 30 40 50 60 70 B0 90
TIME FROM BEGINNING OF RRINFRLL (hrs)

100

110

_ Computed PMF hydrograph and historic flood peak for Arbuckle Dam near Sulphur, OK.

~'% i,
. - I,
l
,

17, South Fork Republican River near Hale, Colorado

An unusually heavy storm of cloudburst intensity occurred in eastern Colorado and western Ne-
braska on May 30 and 31, 1935, The resulting floods on the Republican and the Arikaree Rivers
were the greatest ever recorded in the upper parts of the basins, The area of heaviest rainfall
contained no official precipitation stations; data were obtained from local residents. The storm
began during the afternoon of May 30 and continued into the night of May 31, just east of the
front range of the Colorado Rocky Mountains, This storm followed a general northeasterly direction
across the headwaters of the Republican River, During the afternoon, local residents measured as
much as 20 in (including some hail) in stock tanks and other improvised rain gauges, In Nebraska
and Kansas, the flood volumes were augmented by additional rains during the next 2 days, One
of the largest unit discharges recorded was for the South Fork of the Republican River near Hale,
Colorado [35], A peak discharge of 103,000 ft3/S from a contributing area of 1,612 mi' was
reported,

In 1983, the USBR prepared a revised PMP study for Bonny Dam located on the Republican River
in eastern Colorado, near the site of the 1 935 flood measurements [36], The PMP for this revised
flood study was derived from HMR 51-52 procedures [3, 4], Nine subbasins were used in the

43