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<br />NOTES TO USERS
<br />
<br />107037'30"
<br />39033'45.
<br />
<br />SPECIAL FLOOD HAZARD AREAS SUBJECT TO INUNDATION
<br />BY THE 1 % ANNUAL CHANCE FLOOD EVENT
<br />
<br />LEGEND
<br />
<br />The 1 % annual chance flood (1 aD-year flood), 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, AD, AR, A99, V, and VE, The Base
<br />Flood Elevation is the water surface elevation of the 1 % annual chance flood.
<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 iocai
<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 />
<br />To obtain more detailed information in areas where Base Flood Elevation
<br />(BFEsl and/or floodways have been determined, users are encouraged to consult
<br />the Flood Profiies and Floodway Data tabies contained within the Flood Insur-
<br />ance Study (FISI 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 oniy 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 />ZONE A
<br />
<br />ZONE AE
<br />
<br />ZONE AH
<br />
<br />Base flood elevations determined.
<br />
<br />Flood depths of 1 to 3 feet (usually areas of ponding); base flood
<br />elevations determined.
<br />
<br />ZONE AO
<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 />Coastal Base Flood Elevation (BFEs) shown on this map apply oniy land-
<br />ward of 0.0' National Geodetic Vertical Datum (NGVD). Users of this FIRM
<br />should be aware that coastal fiood eievations 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 />ZONE AR 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 />ZONE AS9 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 />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 />ZONE V Coastal flood zone with velocity hazard (wave action); no base flood
<br />elevations determined,
<br />
<br />ZONE VE Coastal flood zone with velocity hazard (wave action); base flood elevations
<br />determ ined.
<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 />OTHER FLOOD AREAS
<br />
<br />The flood way 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 />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 (UTMI zone 13. The horizontal datum is NAD83, GRS 1980
<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 />ZONEX
<br />
<br />Flood elevations on this map are referenced to the National Geodetic Vertical
<br />Datum of 1 929. 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 Nationai Geodetic Vertical Datum of 1929
<br />and the North American Vertical Datum of 1 988, visit the Nationai Geodetic
<br />Survey website at www,ngs.noaa,gov or contact the National Geodetic Survey
<br />at the following address:
<br />
<br />CJ
<br />
<br />OTHER AREAS
<br />
<br />ZONE X Areas determined to be outside the 0.2% annual chance floodplain.
<br />
<br />ZONE 0 Areas in which flood hazards are undetermined, but possible,
<br />
<br />~ COAST AL BARRIER RESOURCES SYSTEM (CBRS) AREAS
<br />
<br />~ OTHERWISE PROTECTED AREAS (OPAs)
<br />
<br />Spatial Reference System Division
<br />National Geodetic Survey, NOAA
<br />Silver Spring Metra Center
<br />1315 East-West Highway
<br />Silver Spring, Maryiand 20910
<br />(3011713-3242
<br />
<br />CBRS areas and OPAs are normally located within or adjacent to Special Flood Hazard Areas.
<br />
<br />To obtain current elevation, description, andlor 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.noS.noaa.oov.
<br />
<br />1 % annual chance floodplain boundary
<br />0,2% annual chance floodplain boundary
<br />Floodway boundary
<br />Zone D boundary
<br />
<br />CBRS and OPA boundary
<br />
<br />-513~
<br />
<br />........-- Boundary dividin.g Special Flood Hazard Areas of different
<br />_ _ __ _ _ Base Flood Elevations. flood depths or velocities,
<br />
<br />Base Flood Elevation value where uniform within
<br />elevation in feet-
<br />
<br />Base map information shown on this FIRM was provided in digital format by
<br />U.S. Geological Survey Digital Orthophoto Quadrangles produced at a scale
<br />of 1: 12000 from photography dated September 20, 1993 or later.
<br />
<br />(EL 987)
<br />
<br />-Referenced to the National Geodetic Vertical Datum of 1929
<br />
<br />Transect Line
<br />
<br />Corporate limits shown an 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 />0-------0
<br />@------@
<br />
<br />9]007"30.,32022'30.
<br />
<br />Please refer to the separately printed Map Index for an overview map showing
<br />the layout of map panels for this jurisdiction,
<br />
<br />4276000M
<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 panei, and digitai 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 avaiiable from FEMA;
<br />
<br />DX5510 X
<br />
<br />. M1.5
<br />
<br />Base Flood Elevation line and value; elevation in feet-
<br />
<br />Cross Section Line
<br />
<br />Geographic coordinates referenced to the North American
<br />Datum of 1983 (NAD 83)
<br />
<br />1 ODD-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,oov/m.c;r:
<br />
<br />MAP REPOSITORY
<br />Town of Silt, Town Hall, 231 North 7th Street, Silt,
<br />(Maps available for reference only, not for distribution,)
<br />INITIAL IDENTIFICATiON
<br />JULY 25. 1975
<br />FLOOD HAZARD 80UNDARY MAP REVISIONS
<br />
<br />If you have questions about dlis map or questions concerning the National
<br />Flood Insurance Program in general, please cali 1-877-FEMA-MAP (1-877-336-
<br />26271 or visit the FEMA website at www.fema.gov.
<br />
<br />This map reflects more detailed and up-to-date stream channei configurations
<br />than those shown on the previous FIRM for this jurisdiction. The fioodpiains
<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 Profiies and Fioodway 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 />FLOOD INSURANCE RATE MAP EFFECTIVE
<br />APRIL 1, 1987
<br />FLOOD INSURANCE RATE MAP REVISIONS
<br />August 2. 2006: to update corporate limits. to add base flood elevations, to add special
<br />flood hazard areas, to change special flood hazard areas, to add roads and road names,
<br />and to reflect updated topographic information.
<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 />250
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<br />
<br />MAP SCALE 1" = 500'
<br />500
<br />
<br />1000
<br />FEET
<br />
<br />METERS
<br />150 300
<br />
<br />PANEL 11118
<br />
<br />I
<br />
<br />FIRM
<br />FLOOD INSURANCE RATE MAP
<br />TOWN OF
<br />SILT,
<br />COLORADO
<br />GARFIELD COUNTY
<br />PANEL 1111 OF 1125
<br />
<br />{SEE MAP INDEX FOR FIRM PANEL LA YOUTI
<br />
<br />~
<br />
<br />COMMUNITY
<br />
<br />.1l!.!MIlEB.. .EA/o!EL .sl1EEllL
<br />
<br />Notice to User: The M.p 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 />0802231111 B
<br />MAP REVISED:
<br />AUGUST 2, 2006
<br />
<br />Federal Emergency Management Agency
<br />
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