FLOOD06944

• Designation Number: 356.02
• County: Bent
• Community: Las Animas
• Basin: Arkansas
• Title: Floodplain Information Report - Las Animas
• Date: 7/1/1994
• Designation Date: 7/1/1994
• Floodplain - Doc Type: Educational/Technical/Reference Information

Community

Las Animas
(Bent County)

Holly
(Prowers
County)

Granada
(Prowers
County)

TABLE 4

Flood Control Levees. Related Facilities. and ChannellmDrovements
Designed and Constructed bv the U.S. Armv Corps of Engineers

Flood Control
Facilities

A right (south) bank levee 9.3 miles
long, along the Arkansas River from a
point approximately 1 mile east of the
eastern corporate limit of the City of
Las Animas, along the A.T. & S.F.
Railroad and near the confluence of the
Arkansas River and Purgatoire River, up-
stream to the intake structure for the
Consolidated Ditch near the A.T. & S.F.
Raiiroad, approximately 5.3 miles west
of the western corporate limit of the
City of Las Animas; a left (north) bank
levee about 1 mile long from a point just
upstream of the gaging station on the
Arkansas River, approximately .25 mile
east of the point where State Highway 194
turns from east.west to northeast-south-
west. upstream for 1 mile; gated interior
drains; ramp crossings; irrigation ditch
structures; and a stop log structure where
the levee crosses the A.T. & S.F. Railroad
6 miles west of Las Animas.

A left (north) bank levee beginning at a
point about .5400 feet east of the State
Highway 89 bridge across the Arkansas
River, then extending upstream (westerly)
following the north bank of the Arkansas
River to its confluence with Wild Horse
Creek then turning north and continuing
along the left (east) bank of Wild Horse
Creek to a high point 9000 feet northeast
of the U.S. Highway 50 bridge across Wild
Horse Creek.

Flood Freauency
Design

e

Comoleti9.!!
Date

The CDE project design flood
was 140,000 cfs (J 43 year
flood), The CDE standard
proje~t flood was 200,800 cfs
(>200 year flood). The
100-year flood was 113,000 cfs.

June 17, 1978

The CDE standard project floods
of 62,000 cfs for Wild Horse
Creek and 160,000 cfs for the
Arkansas River were used for
the project design floods. .
The 100-year flood was
36,200 cfs on Wild Horse Creek
and 82,000 cfs on the Arkansas
River.

October 3,1980

e

An outfall channel extending from the The CDE standard project flood November 30, 1980
Arkansas River upstream approximately 1.4 of 41 ,000 cfs on Wolf Creek
miles to a point approximately 1600 feet was used for the project design
east of the U.S. Highway 385 bridge north flood (>200 year flood) for the
of Granada; a right (east) bank levee 1.36 floodway portion of the project.
miles long and a left (west) bank levee The outfall channel was designed
1.48 miles long along the outfall channel; for 9200 cfs (J 5-year flood). The
a floodway channel extending from the up- 100-year flow is 27.000 cfs.
stream limit of the outfall channel up-
stream to a point slightly upstream of its
crossing under U.S. Highway 50; a right
bank levee extending from the downstream
limit of the floodway channel upstream
approximately 1.3 miles to a point approxi-
mately 1900 feet south of the crossing of
the floodway channel by U.S. Highway 50;
and a branch right bank levee extending from
a high point along the South Granada Ditch
approximately .5 mile east of Granada up-
stream along the South Granada Ditch ap-
proximately .7 mile to the downstream
limit of the floodway channel.

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