FLOOD11732

• Designation Number: 377
• County: Boulder
• Community: Boulder
• Stream Name: Bear Creek, Fourmile Canyon Creek
• Basin: South Platte
• Title: FIS - Boulder
• Date: 8/4/1988
• Prepared For: Boulder
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

5.3 Flood Insurance Zones

Flood insurance zones and zone numbers are assigned based on the
type of flood hazard and the FHF, !"espectively. A unique zone
number is a,ssociated with each possihle FHF, and varies from I for
a FHF of 005 to a maximum of 30 for a FHF of 200 or greater.

Zone A:

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

.

~

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 elevat ions are shown,
but no FHFs are determined.

Zones Al-A8, All,
A12, .1\14
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 is not
subdivided.

..

Zone C:

Areas of mlnimal flood hazard; not sub-
divided.

The flood eLevat ion difference~, FHF~', flood in,surance zones, and
base flood elevations for each floodiug source studied by detailed
methods in the community are summari?~d in Table 4.

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