FLOOD09872

• County: Broomfield
• Community: Broomfield
• Basin: South Platte
• Title: Flood Insurance Rate Map - City and County of Broomfield - Panel 83 of 125
• Date: 11/25/2003
• Prepared For: Broomfield
• Prepared By: FEMA
• Floodplain - Doc Type: Historic 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 trom local
drainage Sources of small size. The community map repository should be
consulted for possible updated or additional flood hazard information.

105003'45'
39058'07.5"

To obtain more detailed information in areas where Base Flood Elevation
IBFEs~ andlor floodways have been determined, users are encouraged to consult
the Flood Profiles and Floodway Data tables contained within the Flood Insur-
ance Study IFIS\ report that accompanies this F1RM. 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 nat be used
as the sole source of flood elevation information. Accordingly, flood elevation
data presented in the FIS should be utilized in conjunction with the FIRM for
purposes of construction and/or floodplain management.

Coastal Base Flood Elevation (BFEs) shown on this map apply only land~
ward of 0.0' North American Vertical Datum INA VOl. Users of this FIRM
should be aware that coastal flood elevations may also be provided in the
Summary of Stillwater Elevations table in the Flood Insurance Study report for
this community. 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
in this jUrisdiction.

The projection used in the preparation of this map is Universal Tranverse
Mercator IUTMJ zone 13. The horizontal datum is NAD27, CLARKE1866
spheroid. Differences in datum, spheroid, projection or UTM zones used in
the production of FIRMs for adjacent jurisdictions may result in slight positional
differences [0 map feEltures across jurisdiction boundaries. These differences
do not affect the accuracy of the FIRM.

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 www.ngs.noaa.gov or contact the National Geodetic Survey
at the following address:

Spatial Reference System DiviSion
National Geodetic Survey, NOAA
Silver Spring Metro Center
1315 East-West Highway
Silver Spring, Maryland 20910
1301) 713-3191

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T

To obtain current elevation, description, and/or location information fOf bench marks
shown on this map, please contact the Information Services Branch of the
National Geodetic Survey at [phone], or visit their website at
W_W_\IY.,flg~.~~QY.:..

Base map information shown on this FIRM was provided in digital format by
the Department of Community Development Geographic Information
Systems IGIS) Division. One DesCombes Drive Broomfield, CO 80020,

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 showing
the layout of map panels for this jurisdiction.

An accompanying Flood Insurance Study report, Letters of Map Revision or
letters of Map Amendment revising portions 01 this panel, and digital versions
of this PANEL may be available_ Contact the FEMA Map Service Center at
the following phone numbers and Internet address for infomation on all related
products avarlable from FEMA;

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Phone: [phone]
FAX: [phone]
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If you have questions about this map or Questions concerning the National
Flood Insurance Program in general, please call 1-877-FEMA.MAP 11-877-336-
2627) or visit the FEMA website at www,fema,gov,

LIMIT OF
DETAILED
STuDY

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 may reflect stream channel distances that differ from what is
shown on this map,

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39056'15"
105003'45.

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NOTE: MAP AREA SHOWN ON THIS PANEL IS
LOCATED WITHIN TOWNSHIP 1 SOUTH. RANGE
68 WEST AND TOWNSHIP 1 SOUTH, RANGE 69 WEST_

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LEGEND

SPECIAL FLOOD HAZARD AREAS SUBJECT TO INUNDATION
BY THE 1 % ANNUAL CHANCE FLOOD EVENT

105C101'52.!:~
39'S8'07.5'

The 1 % annual chance flood (1 aD-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, AD, AR, A99, V, and VE. The Base
Flood Elevation is the water surface elevation of the 1 % annual chance flood.

4424000 M

ZONE A
ZONE AE
ZONE AH

ZONE AO

ZONE AR

ZONE A99

ZONE V

ZONE VE

W 147TH

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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 (usuallv sheet flow on sloping terrain);
average depths determined. For areas of alluvial fan flooding, velocities
also determined.

Area of special flood hazard formerly protected 1rom the 1 % annual
chance flood event by a trood 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 trood event.

Area to be protected from 1 % annual chance flood event 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.

FLOODWAY AREAS IN ZONE AE

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

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OTHER FLOOD AREAS

Areas of 0.2% annual chance tlood; areas of 1 % ;mntJi't1 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.

OTHER AREAS

Areas determined to be outside the 0.2% annual chance iloodplain.

Areas in which flood hazards are undetermined, but possible.

COAST AL BARRIER RESOURCES SYSTEM (CBRSI AREAS

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~ 442:1000 M

CBRS areas and O?As are normally localed within or adjacent 10 Special Flood Hazard Areas.

OTHERWISE PROTECTED AREAS (OPAs)

Floodplain boundary
Floodway boundary
Zone 0 boundary

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CBRS and OPA boundary

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tEL 987)

~ ~ Boundary dividing Special Flood Ha2ard Areas of different
~"":!I"'.-- ,.....-- Base Flood Elevations, flood depths or velocities.

Base Flood Ele\lation line and \lalue; elevation in feet-

Base Flood Elevation value where uniform within zone;
elevation in teet-

-Referenced to the North Amedcan Vertical Datum of 1988

Cross Section Line

0---0
@------@

Transect Line

Geographic coordinates referenced to the North American
Datum of 1927 (NAD 27)

97'07'30., )2022':)0-

MAP REPOSITORY
City Hall, Engineering Department, One OesCombes Drive, Broomfield, Colorado, B002D.
IMaps available for reference only, not for distribution.)
INITIAL IDENTIFICATION
SEPTEM8ER 7,1973
FLOOD HAZARD BOUNDARY MAP REVISIONS
NOf"le
FLOOD INSURANCE RATE MAP EFFECTIVE
DECEMBER 31, 1974
FLOOD INSURANCE RATE MAP REVISIONS
DECEM8ER 31, 1974 AUGUST 22, 1975 DECEMBER 14, 1982
AUGUST 16, 1988 SEPTEMBER 28, 1990 SEPTEMBER 30. 1997
to update corporate limits, to ctlange base flood ele'lations,
to add base flood elevations, to add special flood hazard areas, to update map
format, to add roads and road f"lames, to reflect updated topographic information, to
Incorporate previously issued letters of map revision,

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4422000 M

4276000M
600000 FT

. M1.5

lOaD-meter Universal Transverse Mercator grid values, zone 13

5000-100t grid ticks

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

River Mile

To determine if flood insurance is available in this community, contact your insurance
agent or call the National Flood Insurance Program at [phone].

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PANEL 0083F

FIRM
FLOOD INSURANCE RATE MAP

CITY AND COUNTY OF
BROOMFIELD.
COLORADO

PANEL 83 OF 125

ISEE MAP INDEX FOR FIRM PANEL LA YO UTI

CONTAINS:....

COMMUNIIY_

_Nl,tMBEB_ PANEl_ _SJJ.EE1.!.

CITY AND COUNTY OF
BROOMFIELD

OCll3

F

C'1l5C73

':f.I1I"""
r. _'l..)_~
pr~li:~- '2'"y
Mwhce.1 8.a"er Jr, Inc.

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Notle., to User; Tn., M..p NurnbO!, sno....., below ~"Duld be usea
when p1ae,ng >rap orden:; the Com....unity Number shown
..ba..lf, sohouid be used on 'nS.Jra....ce a"plicattonS tor tho sub,ect
cO"'llm....t",ty.

MAP NUMBER
0850730083F

MAP REVISED:

Federal Emergency :vlanagement Agency