FLOOD01931

• County: Clear Creek
• Community: Empire
• Stream Name: Clear Creek
• Title: Flood Insurance Study - City of Empire
• Date: 6/1/1976
• Prepared For: Clear Creek County
• Prepared By: FIA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

Two reaches meeting the above criteria were required for the
flooding sources of Empire. These included one on the West
Fork of Clear Creek and one on Lion Creek. The locations of
the reaches are shown on the flood profi les (Exhibit I).

5.2 Flood Hazard Factors

The Flood Hazard Factor (FHF) is the Federal Insurance device
used to correlate flood information with insurance rate tables.
Correlations between property damage from floods and their FHF
are used to set actuarial insurance premium rate tables based
on FHF's from 005 to 200.

The FHF for a reach is the average weighted difference between
the 10- and the 100-year flood water surface elevations ex-
pressed to the nearest one-half foot, and shown as a three
digit code. For example, if the difference between water sur-
face elevations of the 10-year and 100-year floods is 0.7 feet,
the FHF is 005; if the difference is 1.4 feet, the FHF is 015;
if the difference is 5.0 feet, the FHF is 050.

5.3 Flood Insurance Zones

After the determination of reaches and their respective Flood
Hazard Factors, the entire incorporated area of Empire was
divided into zones, each having a specific flood potential or
hazard. Each zone was assigned one of the fol lowing flood
insurance zone designations:

Aones AI, A2, A-, etc.:

Special flood hazard areas
inundated by the 100-year
flood with base flood elevations
determined and zone designations
assigned according to FHF.

Zone B:

Area between Zones AI, A2, A-.
etc., and the 1 imits of the 500-
year flood, or areas subject to
shal low flooding by the 100-
year flood with unpredictable
flow paths and depths less than
one foot.

Zone C:

Area not subject to flooding
by the 500-year flood.

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