FLOOD00285

• County: Statewide
• Community: State
• Stream Name: All
• Title: Floodplain Designation and Approval
• Date: 12/11/1987
• Prepared For: State of Colorado
• Prepared By: CWCB
• Floodplain - Doc Type: Miscellaneous

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3. DesiQn Criteria. These rules do not apply to the
selection of optimal economic design criteria for the
construction of roads, bridges, irrigation structures, or
any other facility in the floodplain.

4. Dam Failure FloodDlain. These rules do. not apply to the
identification of the area potentially inundated by tne
catastrophic or sudden failure of any man-made structure
such as a dam, canal, irrigation ditch. pipeline. or other
artificial channel.

Rule 4. Definitions:

A. Terms Defined Herein. The following definitions are
applicable to these Floodplain Designation and Approval Rules:

1. "Adequate progress" means that funding for a project has
been 100 percent authorized. at least 60 percent
appropriated, and at least 50 percent expended.

2. "Approximate floodplain information" means floodplain
information prepared by signifi- cantly reducing the level
of detail for topographic mapping, hydrology, or hydraulic
calculations to arrive at floodplain delineations without a
comparison of water surface profiles with a topographic map
of compatible accuracy.

3. "Basin" means the total land surface area from which
precipitation is carried away by a stream or system of
streams under the force of gravity and discharged through
one or more outlets.

4. "Board" means the Colorado Water Conservation Board.

5. "Channel" means a place on the surface of the earth where
water flows regularly or intermittently with a perceptible
current between observable banks, although the location of
such banks may vary under different conditions.

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6. "Community. means any political subdivision in the state
of Colorado which has authority to adopt and enforce
floodplain management regulations through zoning"
including, but not limited to, cities, towns,
unincorporated areas in the count ies. lndi an tri bes, and;
Urban Drainage and Flood Control'Districts.

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2 CCR 408.1

THE CODE OF C:OLORADO REGULATIO~.S
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