FLOOD09630

• Designation Number: 331
• County: Mesa
• Community: Grand Junction
• Basin: Colorado Mainstem
• Title: Flood Insurance Study - Grand Junction, Colorado, Mesa County
• Date: 7/1/1992
• Designation Date: 11/1/1992
• Floodplain - Doc Type: Floodplain Report/Masterplan

Highline Canal Division; U.S. Bureau of Reclamation, Grand Junction
Office; and the National Weather Service.

On January 25, 1979, an intermediate coordination meeting was held
to discuss the progress of the study and the limits of work. In
attendance were representatives of Grand Junction, Mesa County,
FEMA, and the study contractor.

The final CCO meeting was held on June 18, 1981, and was attended
by representatives of FEMA, the study contractor, and the City of
Grand Junction. All problems raised at the meeting were resolved.

For the restudy, an initial ceo meeting was held in Grand Junction
on June 10, 1988. This meeting, attended by representatives of the
City of Grand Junction, FEMA, the CWCB, The Colorado Department of
Highways, the COE, and the study contractor, was held to discuss
the nature and purpose of the study and the scope and limits of
work.

The following organizations were contacted and supplied information
used in the preparation of this report: The City of Grand
Junction, the CWCB, FEMA, the COE (Sacramento District), Colorado
Department of Highways, the Grand Junction Dailv Sentinel, and the
U.S. Bureau of Reclamation, Grand Junction Office.

The results of the restudy were reviewed at the final CCo meeting
held on August 18, 1991, and attended by representatives of FEMA,
the CWCB, the Dailv Sentinel, the City of Grand Junction and the
study contractor. All problems raised at that meeting have been
addressed in this study.

2.0 AREA STUDIED

2.1 Scope of Study

ThJs Flood InS\lrii_n_Ce Study cov_"rs
City of Grand Junction, Colorado.
the Vicinity Map (Figure 1).

the incorpo.r.a~ecl__areas of tlie
The area of study is shown on

The limits of detailed study 1n the City of Grand Junction were
determined by FEMA with community and study contractor
consultation, at the initial CCO meeting. The flooding sources
identified for study by detailed methods included the Colorado
River, the Horizon Drive Channel, Indian Wash, and a small portion
of Leach Creek. Downstream of 26t Road, the Horizon Drive Channel
flows into Independent Ranchmens Ditch, which then empties into
Leach Creek.

The areas studied by detailed methods were selected with priority
given to all known flood hazards and areas of projected development
or proposed construction through 1995.

2