08001C0316H

• County: Adams
• Community: Adams County and Incorporated Areas
• Title: FIRM - Adams County and Incorporated Areas - Panel 316H
• Date: 3/5/2007
• Prepared For: Adams County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

NOTES TO USERS

This map is for use in administering the National Flood Insurance Program. It
does not necessarily identify all areas subject to flooding, particularly from local
drainage sources of small size. The community map repository should be
consulted for possibJe updated or additional flood hazard information.

To obtain more detailed information in areas where Base Flood Elevations
(BFEs) and/or floodways have been determined, users are encouraged to consult
the Flood Profiles and Floodway Data and/or Summary of Stillwater Elevations
tables contained within the Flood Insurance Study (FIS) report that accompanies
this FIRM. Users should be aware that BFEs shown on the FIRM represent
rounded whole- foot elevations. These BFEs are intended for flood insurance
rating purposes only and should not be used as the sole source of flood
elevation information. Accordingly, flood elevation data presented in the FIS
report should be utilized in conjunction with the FIRM for purposes of
construction and/or floodplain management.

Coastal Base Flood Elevations shown on this map apply only landward
of 0.0' North American Vertical Datum of 1988 (NAVD 88). Users of this
FIRM should be aware that coastal flood elevations are also provided in the
Summary of Stillwater Elevations table in the Flood Insurance Study report
for this jurisdiction. Elevations shown in the Summary of Stillwater Elevations
table should be used for construction and/or floodplain management purposes
when they are higher than the elevations shown on this FIRM.

Boundaries of the floodways were computed at cross sections and interpolated
between cross sections. The floodways were based on hydraulic considerations
with regard to requirements of the National Flood Insurance Program. Floodway
widths and other pertinent floodway data are provided in the Flood Insurance
Study report for this jurisdiction.

Certain areas not in Special Flood Hazard Areas may be protected by flood
control structures. Refer to Section 2.4 "Flood Protection Measures" of
the Flood Insurance Study report for information on flood control structures
for this jurisdiction.

The projection used in the preparation of this map was Universal Transverse
Mercator (UTM) zone 13. The horizontal datum was NAD83 , GRS1980
spheroid. Differences in datum, spheroid, projection or UTM zones used in
the production of FIRMs for adjacent jurisdictions may result in slight positional
differences in map features across jurisdiction boundaries. These differences
do not affect the accuracy of this FIRM.

4420 DOOm N

Flood elevations on this map are referenced to the North American Vertical
Datum of 1988. These flood elevations must be compared to structure and
ground elevations referenced to the same vertical datum. For information
regarding conversion between the National Geodetic Vertical Datum of 1929
and the North American Vertical Datum of 1988, visit the National Geodetic
Survey website at http://www.ngs.noaa.gov/ or contact the National Geodetic
Survey at the following address:

NGS Information Services
NOAA, N/NGS12
National Geodetic Survey
SSMC- 3, #9202
1315 East- West Highway
Silver Spring, MD 20910- 3282

To obtain current elevation, description, and/or location information for bench marks
shown on this map, please contact the Information Services Branch of the
National Geodetic Survey at (301) 713- 3242, or visit its website at
http://www.ngs.noaa.gov/.

Base map information shown on this FIRM was provided by the Adams County
and Commerce City GIS departments. The coordinate system used for the production
of the digital FIRM is Universe Transverse Mercator, Zone 13N, referenced to
North American Datum of 1983 and the GRS 80 spheroid, Western Hemisphere.

This map reflects more detailed and up- to- date stream channel configurations
than those shown on the previous FIRM for this jurisdiction. The floodplains
and floodways that were transferred from the previous FIRM may have been
adjusted to conform to these new stream channel configurations. As a
result, the Flood Profiles and Floodway Data tables in the Flood Insurance
Study report (which contains authoritative hydraulic data) may reflect stream
channel distances that differ from what is shown on this map.

Corporate limits shown on this map are based on the best data available
at the time of publication. Because changes due to annexations or de- annexations
may have occurred after this map was published, map users should contact
appropriate community officials to verify current corporate limit locations.

Please refer to the separately printed Map Index for an overview map of the
county showing the layout of map panels; community map repository addresses;
and a Listing of Communities table containing National Flood Insurance Program
dates for each community as well as a listing of the panels on which each
community is located.

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Contact the FEMA Map Service Center at 1- 800- 358- 9616 for information on
available products associated with this FIRM. Available products may include
previously issued Letters of Map Change, a Flood Insurance Study report,
and/or digital versions of this map. The FEMA Map Service Center may also be
reached by Fax at 1- 800- 358- 9620 and its website at http://www.msc.fema.gov/.

If you have questions about this map or questions concerning the National
Flood Insurance Program in general, please call 1- 877- FEMA MAP (1.. 877- 336- 2627)
or visit the FEMA website at http://www.fema.gov/.

This digital Flood Insurance Rate Map (FIRM) was produced through a cooperative
partnership between the State of Colorado Water Conservation Board, the
Urban Drainage and Flood Control District, and the Federal Emergency Management
Agency (FEMA). The State of Colorado Water Conservation Board and the Urban Drainage
and FlOOd Control District have implemented a long-term approach of floodplain
management to reduce the costs associated with flooding. As part of this effort, both the
State of Colorado and the Urban Drainage and Flood Control District have joined
in Cooperating Technical Partner agreements with FEMA to produce this digital FIRM.

Additional flood hazard information and resources are available from local
communities, the Colorado Water Conservation Board, and the Urban Drainage and
Flood Control District.

4418000m N

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LEGEND
SPECIAL FLOOD HAZARD AREAS (SFHAs) SUBJECT TO
INUNDATION BY THE 10/0 ANNUAL CHANCE FLOOD

104054'22.50"
39056'15.00"

The 1% annual chance flood (100-year flood), also known as the base flood, is the flood
that has a 1% chance of being equaled or exceeded in any given year. The Special
Flood Hazard Area is the area subject to flooding by the 1% annual chance flood. Areas
of Special Flood Hazard include Zones A, AE, AH, AO, AR, A99, V and VE. The Base
Flood Elevation is the water-surface elevation of the 1 % annual chance flood.

ZONE A
ZONE AE
ZONE AH

No Base Flood Elevations determined.

Base Flood Elevations determined.

Flood depths of 1 to 3 feet (usually areas of ponding); Base Flood
Elevations determined.

Flood depths of 1 to 3 feet (usually sheet flow on sloping terrain);
average depths determined. For areas of alluvial fan flooding, velocities
also determined.

Special Flood Hazard Area formerly protected from the 1 % annual
chance flood by a flood control system that was subsequently
decertified. Zone AR Indicates that the former flood control system is
being restored to provide protection from the 1% annual chance or
greater flood.

Area to be protected from 1% annual chance flood by a Federal
flood protection system under construction; no Base Flood Elevations
determined.

Coastal flood zone with velocity hazard (wave action); no Base Flood
Elevations determined.

Coastal flood zone with velocity hazard (wave action); Base Flood
Elevations determined.

ZONE AO

ZONE AR

ZONE A99

ZONE V

ZONE VE

FLOODWAY AREAS IN ZONE AE

The floodway is the channel of a stream plus any adjacent floodplain areas that must be
kept free of encroachment so that the 1% annual chance flood can be carried without
substantial increases in flood heights.

OTHER FLOOD AREAS

ZONE X

Areas of 0.2% annual chance flood; areas of 1 % annual chance flood
with average depths of less than 1 foot or with drainage areas less than
1 square mile; and areas protected by levees from 1% annual chance
flood.

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OTHER AREAS

ZONE X
ZONE D

Areas determined to be outside the 0.2% annual chance floodplain.
Areas in which flood hazards are undetermined, but possible.

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COASTAL BARRIER RESOURCES SYSTEM (CBRS) AREAS

1~~~~1

OTHERWISE PROTECTED AREAS (OPAs)

CBRS areas and OPAs are normally located within or adjacent to Special Flood Hazard Areas.

FlOOdplain boundary

Floodway boundary

Zone D boundary

CBRS and OPA boundary

Boundary dividing Special Flood Hazard Areas of different
Base Flood Elevations, flood depths or flood velocities.

.................

513 "'" ~ ~ Base FlOOd Elevation line and value; elevation in feet*

(EL 987) Base Flood Elevation value where uniform within zone;
elevation in feet*

* Referenced to the North American Vertical Datum of 1988 (NAVD 88)

@ @
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Cross section line

Transect line

97007'30",32022'30"

Geographic coordinates referenced to the North American
Datum of 1983 (NAD 83)

4275000mN

lOOO-meter Universal Transverse Mercator grid ticks, zone 13

6000000 M

SOOO-foot grid ticks: Alabama State Plane coordinate
system, east zone (FIPSZONE 0101), Transverse Mercator

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Bench mark (see explanation in Notes to Users section of
this FIRM panel)

.M1.5

River Mile

MAP REPOSITORIES
Refer to Map Repositories list on Map Index

EFFECTIVE DATE OF COUNTYWIDE
FLOOD INSURANCE RATE MAP
August 16, 1995
EFFECTIVE DATE(S) OF REVISION(S) TO THIS PANEL
March 5, 2007 - to update map format.

For community map revision history prior to countywide mapping, refer to the Community
Map History table located in the Flood Insurance Study report for this jurisdiction.

To determine if flood insurance is available in this community, contact your insurance
agent or call the National Flood Insurance Program at 1- 800- 638- 6620.

..

MAP SCALE 1" = 500'
250 0 500
H H I I
1--1 1--1 I---l I
150 0 150

1000
I FEET
I METERS
300

39054'22.50"
104054'22.50"

Federal Emergency Management Agency

PANEL 0316H

l

FIRM
FLOOD INSURANCE RATE MAP

ADAMS COUNTY,
COLORADO
AND INCORPORATED AREAS

PANEL 316 OF 1150
(SEE MAP INDEX FOR FIRM PANEL LAYOUT)
CONTAINS:
COMMUNITY NUMBER PANEL SUFFIX

ADAMS COUNTY
THORNTON 1 CITY OF

080001
080007

0316
0316

H
H

Notice to User: The Map Number shown below should be
used when placing map orders; the Community Number shown
above should be used on insurance applications for the subject
community.

MAP NUMBER
08001C0316H
MAP REVISED
MARCH 5, 2007