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<br />NOTES
<br />
<br />TO
<br />
<br />USERS
<br />
<br />This map is for use in administering the National Flood Insurance Program. It
<br />does not necessarily identify all areas subject to flooding, particularly from local
<br />drainage sources of small size. The community map repository should be
<br />consulted for possible updated or additional flood hazard information.
<br />
<br />
<br />SPECIAL FLOOD HAZARD AREAS SUBJECT TO INUNDATION
<br />BY THE 1 % ANNUAL CHANCE FLOOD EVENT
<br />
<br />LEGEND
<br />
<br />JOINS PANEL 041 0
<br />
<br />105007'30"
<br />40003 '45"
<br />
<br />The 1 % annual chance flood (100-year floodL also known as the base flood, is the flood
<br />that has a 1 % chance of being equaled or exceeded in any given year. The Special
<br />Flood Hazard Area is the area subject to flooding by the 1 % annual chance flood. Areas
<br />of Special Flood Hazard include Zones A, AE, AH, AO, AR, A99, V, and VE. The Base
<br />Flood Elevation is the water surface elevation of the 1 % annual chance flood.
<br />
<br />105011 '15/1
<br />40003'45/1
<br />
<br />To obtain more detailed information in areas where Base Flood Elevation
<br />(BFEs) and/or floodways have been determined, users are encouraged to consult
<br />the Flood Profiles and Floodway Data tables contained within the Flood Insur-
<br />ance Study (FIS) report that accompanies this FIRM. Users should be aware that
<br />BFEs shown on the FIRM represent rounded whole-foot elevations. These BFEs
<br />are intended for flood insurance rating purposes only and should not be used
<br />as the sole source of flood elevation information. Accordingly, flood elevation
<br />data presented in the FIS should be utilized in conjunction with the FIRM for
<br />purposes of construction and/or floodplain management.
<br />
<br />
<br />
<br />
<br />
<br />
<br />I-
<br />w
<br />w
<br />0:
<br />l-
<br />(/)
<br />
<br />ZONEA
<br />
<br />ZONE AE
<br />
<br />ZONE AH
<br />
<br />Base flood elevations determined.
<br />
<br />No base flood elevations determined.
<br />
<br />
<br />7
<br />
<br />8
<br />
<br />9
<br />
<br />ZONEAO
<br />
<br />Flood depths of 1 to 3 feet (usually areas of ponding); base flood
<br />elevations determined.
<br />
<br />Flood depths of 1 to 3 feet (usually sheet flow on sloping terrain);
<br />average depths determined. For areas of alluvial fan flooding, velocities
<br />also determined.
<br />
<br />ZONE X
<br />
<br />ZONE AR
<br />
<br />I
<br />Ii:
<br />o
<br />tv
<br />
<br />Area of special flood hazard formerly protected from the 1 % annual
<br />chance flood event by a flood control system that was subsequently
<br />decertified. Zone AR indicates that the former flood control system is
<br />being restored to provide protection from the 1 % annual chance or
<br />greater flood event.
<br />
<br />Coastal Base Flood Elevation (BFEs) shown on this map apply only land-
<br />ward of 0.0' National Geodetic Vertical Datum (NGVD}. Users of this FIRM
<br />should be aware that coastal flood elevations may also be provided in the
<br />Summary of Stillwater Elevations table in the Flood Insurance Study report for
<br />this community. Elevations shown in the Summary of .Stillwater Elevations table
<br />should be used for construction, and/or floodplain management purposes when
<br />they are higher than the elevations shown on this FIRM.
<br />
<br />~tch
<br />
<br />
<br />ZONE A99
<br />
<br />Area to be protected from 1 % annual chance flood event by a Federal
<br />flood protection system under construction; no base flood elevations
<br />determined.
<br />
<br />BOULDER COUNTY
<br />UNINCORPORATED AREAS
<br />080023
<br />
<br />ZONEV
<br />
<br />Coastal flood zone with velocity hazard (wave action); no base flood
<br />elevations determined.
<br />
<br />Boundaries of the floodways were computed at cross sections and interpolated
<br />between cross sections. The floodways were based on hydraulic considerations
<br />with regard to requirements of the National Flood Insurance Program. Floodway
<br />widths and other pertinent floodway data are provided in the Flood Insurance
<br />Study report for this jurisdiction.
<br />
<br />17
<br />
<br />ZONEVE
<br />
<br />Coastal flood zone with velocity hazard (wave action); base flood elevations
<br />determined.
<br />
<br />
<br />FLOODWAY AREAS IN ZONE AE
<br />
<br />Certain areas not in Special Flood Hazard Areas may be protected by flood
<br />control structures. Refer to Section 2.4 "Flood Protection Measures" of
<br />the Flood Insurance Study report for information on flood control structures
<br />in this jurisdiction.
<br />
<br />The floodway is the channel of a stream plus any adjacent floodplain areas that must be
<br />kept free of encroachment so that the 1 % annual chance flood can be carried without
<br />substantial increases in flood heights.
<br />
<br />ZONE X
<br />
<br />OTHER FLOOD AREAS
<br />
<br />Areas of 0.2% annual chance flood; areas of 1 % annual chance flood
<br />with average depths of less than 1 foot or with drainage areas less than
<br />1 square mile; and areas protected by levees from 1 % annual chance
<br />flood.
<br />
<br />The projection used in the preparation of this map is Universal Tranverse
<br />Mercator (UTM) Zone 13. The horizontal datum is NAD27, CLARKE1866
<br />spheroid. Differences in datum, spheroid, projection or UTM zones used in
<br />the production of FIRMs for adjacent jurisdictions may result in slight positional
<br />differences in map features across jurisdiction boundaries. These differences
<br />do not affect the accuracy of the FIRM.
<br />
<br /><0
<br />CY)
<br /><:t
<br />o
<br />....J
<br />W
<br />Z
<br /><(
<br />ll..
<br />(/)
<br />Z
<br />o
<br />...,
<br />
<br />~~~
<br />
<br />COASTAL BARRIER RESOURCES SYSTEM (CBRS) AREAS
<br />
<br />OTHER AREAS
<br />
<br />Flood elevations on this map are referenced to the National Geodetic Vertical
<br />Datum of 1929. These flood elevations must be compared to structure and
<br />ground elevations referenced to the same vertical datum. For information
<br />regarding conversion between the National Geodetic Vertical Datum of 1929
<br />and the North American Vertical Datum of 1988, visit the National Geodetic
<br />Survey website at www.ngs.noaa.gov or contact the National Geodetic Survey
<br />at the following address:
<br />
<br />ZONEX
<br />ZONE D
<br />
<br />Areas determined to be outside the 0.2% annual chance floodplain.
<br />Areas in which flood hazards are undetermined, but possible.
<br />
<br />Vertical Network Branch, N/CG 13
<br />National Geodetic Survey, NOAA
<br />Silver Spring Metro Center 3
<br />1315 East-West Highway
<br />Silver Spring, Maryland 20910
<br />(301) 713-3191
<br />
<br />RAILROAD
<br />
<br />~~~",~1
<br />
<br />OTHERWISE PROTECTED AREAS (OPAs)
<br />
<br />CBRS areas and OPAs are normally located within or adjacent to Special Flood Hazard Areas.
<br />
<br />To obtain current elevation, description, and/or location information for bench marks
<br />shown on this map, please contact the Information Services Branch of the
<br />National Geodetic Survey at (301) 713-3242, or visit their website at
<br />www.ngs.noaa.gov.
<br />
<br />................
<br />
<br />DRIVE
<br />
<br />Base map information shown on this FIRM was provided in digital format by
<br />U.S. Bureau of Census TIGER files and have been geopositionally corrected.
<br />
<br />~513~
<br />
<br />(El 987)
<br />
<br />Corporate limits shown on this map are based on the best data available
<br />at the time of publication. Because changes due to annexations or de-annexations
<br />may have occurred after this map was published, map users should contact
<br />appropriate community officials to verify current corporate limit locations.
<br />
<br />Please refer to the separately printed Map Index for an overview map of the
<br />county showing the layout of map panels; community map repository addresses;
<br />and a Listing of Communities table containing National Flood Insurance Program
<br />dates for each community as well as a listing of the panels on which each
<br />community is located.
<br />
<br />ZONE X
<br />
<br />21
<br />
<br />Floodplain Boundary
<br />Floodway Boundary
<br />Zone D Boundary
<br />
<br />Coastal Barrier Boundary
<br />
<br />Boundary dividing Special Flood Hazard Areas of different
<br />Base Flood Elevations, flood depths or velocities.
<br />
<br />Base Flood Elevation line and value; elevation in feet*
<br />
<br />Base Flood Elevation value where uniform within zone;
<br />elevation in feet *
<br />
<br />* Referenced to the National Geodetic Vertical Datum of 1929
<br />
<br />Cross Section Line
<br />
<br />23
<br />
<br />24
<br />
<br />0----0
<br />@----@
<br />
<br />
<br />I-
<br />w
<br />w
<br />0:
<br />l-
<br />(/)
<br />
<br />No]
<br />
<br />97007'30", 32022'30"
<br />
<br />
<br />4276000M
<br />
<br />I
<br />?-
<br />m
<br />0>
<br />
<br />600000 FT
<br />
<br />An accompanying Flood Insurance Study report, Letters of Map Revision or
<br />Letters of Map Amendment revising portions of this panel, and digital versions
<br />of this PANEL may be available. Contact the FEMA Map Service Center at
<br />the following phone numbers and Internet address for infomation on all related
<br />products available from FEMA;
<br />
<br />DX551 <k
<br />
<br />1.0
<br />:;;:
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<br />....J
<br />W
<br />Z
<br />~
<br />(/)
<br />~
<br />o
<br />...,
<br />
<br />I
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<br />
<br />. M1.5
<br />
<br />Transect Line
<br />
<br />Geographic coordinates referenced to the North American
<br />Datum of 1927 (NAD 27)
<br />
<br />1 OOO-meter Universal Transverse Mercator grid values, zone 13
<br />
<br />5000-foot grid ticks
<br />
<br />Bench mark (see explanation in Notes to Users section of
<br />this FIRM panel).
<br />
<br />River Mile
<br />
<br />Phone: 800-358-9616
<br />FAX: 800-358-9620
<br />www.fema.gov/msc
<br />
<br />MAP REPOSITORY
<br />Refer to Repository Listing on Index Map
<br />
<br />EFFECTIVE DATE OF COUNTYWIDE
<br />FLOOD INSURANCE RATE MAP
<br />
<br />JUNE 2, 1995
<br />
<br />EFFECTIVE DA TE(S) OF REVISION(S) TO THIS PANEL
<br />
<br />October 4, 2002: to change base flood elevations, to change special flood
<br />hazard areas, to change zone designations, to update roads and road names,
<br />to reflect updated topographic information, to incorporate previously issued
<br />letters of map revision, and to change floodway.
<br />
<br />If you have questions about this map or questions concerning the National
<br />Flood Insurance Program in general, please call 1-877-FEMA-MAP (1-877-336-
<br />2627) or visit the FEMA website at www.fema.gov.
<br />
<br />This map reflects more detailed and up-to-date stream channel configurations
<br />than those shown on the previous FIRM for this jurisdiction. The floodplains
<br />and floodways that were transferred from the previous FIRM may have been
<br />adjusted to conform to these new stream channel configurations. As a
<br />result, the Flood Profiles and Floodway Data tables in the Flood Insurance
<br />Study report may reflect stream channel distances that differ from what is
<br />shown on this map.
<br />
<br />Valmont
<br />Reservoir
<br />
<br />For community map revision history prior to countywide mapping, refer to the Community
<br />Map History table located in the Flood Insurance Study report for this jurisdiction.
<br />
<br />o
<br />
<br />To determine if flood insurance is available in this community, contact your insurance
<br />agent or call the National Flood Insurance Program at (800) 638-6620.
<br />
<br />26
<br />
<br />30
<br />
<br />
<br />Valmont
<br />Reservoir
<br />
<br />WILLOW
<br />GLEN
<br />
<br />500 0
<br />I I--J I--J I
<br />
<br />1---1 1---1 1---1
<br />
<br />WILLOW CREEK
<br />COURT
<br />
<br />300 0
<br />
<br />@[[i[i I
<br />
<br />BROOK HOLLOW
<br />COURT
<br />
<br />co
<br />CY)
<br /><:t
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<br />Z
<br />~
<br />(/)
<br />~
<br />o
<br />...,
<br />
<br />THIS AREA IS SHOWN ON MAP NUMBER 08013C0419
<br />
<br />ARAPAHOE
<br />
<br />ROAD
<br />
<br />ZONE X
<br />
<br />ARLINGTON
<br />
<br />DRIVE
<br />
<br />o
<br />
<br />UJ
<br />(.)
<br />::5
<br />ll..
<br />
<br />MALLARD
<br />POND DRIVE
<br />
<br />
<br />40000'00"
<br />105007'30"
<br />
<br />6
<br />
<br />T1N
<br />40000'00" T1S
<br />105011 '15"
<br />
<br />CITY OF LAFAYETTE
<br />080026
<br />
<br />JOINS PANEL 0560
<br />
<br />JOINS PANEL 0557
<br />
<br />.
<br />
<br />MAP SCALE 1" = 1 000'
<br />
<br />1000
<br />I
<br />
<br />2000
<br />I FEET
<br />
<br />I METERS
<br />600
<br />
<br />300
<br />
<br />PAN EL 0420 G
<br />
<br />I
<br />
<br />FIRM
<br />FLOOD INSURANCE RATE MAP
<br />
<br />BOULDER COUNTY,
<br />COLORADO AND
<br />INCORPORATED AREAS
<br />
<br />PANEL 420 OF 595
<br />
<br />(SEE MAP INDEX FOR FIRM PANEL LAYOUT)
<br />
<br />CONTAINS:
<br />
<br />COMMUNITY
<br />
<br />NUMBER PANEL SUFFIX
<br />
<br />BOULDER COUNlY,
<br />UNINCORPORATED AREAS
<br />LAFA VETTE, CITY OF
<br />
<br />0420
<br />0420
<br />
<br />G
<br />G
<br />
<br />080023
<br />080026
<br />
<br />Notice to User; The Map Number shown below should be used
<br />when placing map orders; the Community Number shown
<br />above should be used on insurance applications for the subject
<br />community.
<br />
<br />
<br />MAP NUMBER
<br />08013C0420 G
<br />
<br />MAP REVISED:
<br />OCTOBER 4, 2002
<br />
<br />Federal Emergency Management Agency
<br />
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