FLOOD02930

• Designation Number: 341
• County: Boulder
• Community: Boulder
• Basin: South Platte
• Title: FIS - Boulder - Volume I
• Date: 5/3/1990
• Designation Date: 3/1/1993
• Floodplain - Doc Type: Floodplain Report/Masterplan

5.3 Flood Insurance Zones

Flood insurance zones and zone numbers are assigned based on the
type of flood hazard and the FHF, respectively. A unique zone
number is associated with each possible FHF, and varies from 1 for
an FHF of 005 to a maximum of 30 for an FHF of 200 or greater.

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Zone A:

Special Flood Hazard Areas inundated by
the 100-year flood, determined by
approximate methods; no base flood
elevations shown or FHFs determined.

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Zone AH:

Special Flood Hazard Areas inundated by
types of 100-year shallow flooding
where depths are between 1.0 and 3.0
feet; base flood elevations are shown,
but no FHFs are determined.

Zones AI-A8, All,
A12, A14
and A16:

Special Flood Hazard Areas inundated by
the 100-year flood; with base flood el-
evations shown, and zones subdivided
according to FHFs.

Zone AD:

Special Flood Hazard Areas inundated by
types of 100-year shallow flooding
where depths are between 1.0 and 3.0
feet; depths are shown, but no FHFs are
determined.

Zone B:

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

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Zone c:

Areas of minimal flood hazard; not sub-
divided.

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The flood elevation differences, FHFs, flood insurance zones, and
base flood elevations for each flooding source studied by detailed
methods in the community are summarized in Table 4.

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