FLOOD08505

• Designation Number: 396
• County: Yuma
• Community: Unincorporated Yuma County
• Basin: South Platte
• Title: Flood Insurance Study - Yuma County, CO, Unincorporated Area
• Date: 12/1/1984
• Designation Date: 3/1/1995
• Floodplain - Doc Type: Floodplain Report/Masterplan

Zone B:

Areas between the Special Flood Hazard
Areas and the limits of the 500-year
floodl areas that are protected from
the 100- or 500-year floods by dike,
levee, or other local water-control
structure 1 areas subject to certain
types of 100-year shallow flooding where
depths are less than 1.0 foot 1 and areas
subject to 100-year flooding from sources
with drainage areas less than 1 square
mile. Zone B is not subdivided.

Zone C:

Areas of minimal flood hazard 1 not sub-
divided.

5.4 Flood Insurance Rate Map Description

The Flood Insurance Rate Map for Yuma County is, for insurance
purposes, the principal product of the Flood Insurance Study. This
map contains the official delineation of flood insurance zoneS and
base flood elevations. Base flood elevation lines show the loca-
tions of the expected whole-foot water-surface elevation of the
base (lOO-year) flood. The base flood elevations and zone numbers
are used by insurance agents, in conjunction with structure eleva-
tions and characteristics, to assign actuarial insurance rates to
structures and contents insured under the NFIP.

6.0 OTHER STUDIES

The COE, Kansas City District, completed analyses of the 10-, 50-, 100-,
and 500-year floods for the North Fork Republican River throughout most
of Yuma County. This information was published in a Flood Plain Informa-
tion Report in November 1981 (Reference 1). Data used in this Flood
Insurance Study were taken from that Flood Plain Information Report.

An older Flood Plain Information Report for the North Fork Republican
River at Wray, Colorado, was prepared by the COE in 1969 (Reference 11).
In that report, the 100-year water-surface profile for the North Fork
Republican River through the City of Wray was approximately 2.5 feet
higher than the 100-year water-surface profile used in the present study.
The earlier water-surface profile was based on 1968 flood plain conditions
and 10-foot contour mapping. The present water-surface profile reflects
existing conditions and 2-foot contour mapping, and will supersede the
profile in the previous COE report.

A Flood Insurance Study is being prepared for the City of Wray (Refer-
enCe 12). The results of this study agree with the Flood Insurance Study
for Wray.

19