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<br />NOTES TO US RS
<br />
<br />This map is for use in administering the National Flood InsuranCB Program. It
<br />does not necessarily identify all areas subject to flooding, paticularly from local
<br />drainage sources of small size. The community map repository should be
<br />consulted for possible updated or additional flood hazard inforrration.
<br />
<br />39015'00"
<br />
<br />To obtain more detailed information in areas where Base Flood Elevations
<br />(BFEs) and/or floodways have been determined, users are encouraged to
<br />consult the Flood Profiles and Floodway Data and/or Summary of 3i11water
<br />Elevations tables contained within the Flood Insurance Study (FS) report that
<br />accompanies this FIRM. Users should be aware that BFEs shown on the FIRM
<br />represent rounded whole-foot elevations. These BFEs are intended for flood
<br />insurance fating purposes only and should not be used as the soe source of flood
<br />elevation information. Accordingly, flood elevation data preserted in the FIS
<br />report should be utilized in conjunction with the FIRM for purpCBes of construction
<br />and/or floodplain management.
<br />
<br />Boundaries of the floodways were computed at cross sections and interpolated
<br />between cross sections. The floodways were based on hydraulic ronsiderations
<br />with regard to requirements of the National Flood Insurance Progam. Floodway
<br />widths and other pertinent floodway data are provided in the Flood Insurance
<br />Study report for this jurisdiction.
<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 the
<br />Flood Insurance Study report for information on flood control stuctures for this
<br />jurisdiction.
<br />
<br />1515000 FT
<br />
<br />The projection used in the preparation of this map was Colorado State Plane
<br />central zone (FIPSZONE 502). The horizontal datum was NAD 83, GRS80
<br />spheroid. Differences in datum, spheroid, projection or State Rane 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 do
<br />not affect the accuracy of this FIRM.
<br />
<br />Flood elevations on this map are referenced to the North Americal Vertical
<br />Datum of 1988 (NA VD 88). These flood elevations must be comparro to
<br />structure and ground elevations referenced to the same vertical datum. An
<br />average offset between NA VD 88 and the National Geodetic Vertica Datum of
<br />1929 (NGVD 29) has been computed for each Douglas County floodirg source.
<br />This offset was then applied to the NGVD 29 flood elevations tha were not
<br />revised during the creation of this countywide format FIRM. Theoffsets for each
<br />flooding source shown on this FIRM are shown in the Douglas Courty Vertical
<br />Datum Offset Table below. For information regarding conversion between the
<br />National Geodetic Vertical Datum of 1929 and the North AmericanVertical Datum
<br />of 1988, visit the National Geodetic Survey website atbttp://www.ngs.noaa.99-Y or
<br />contact the National Geodetic Survey at the following address:
<br />
<br />Spatial Reference System Division
<br />National Geodetic Survey, NOAA
<br />Silver Spring Metro Center
<br />1315 East-West Highway
<br />Silver Spring, Maryland 20910
<br />(301) 713-3191
<br />
<br />To obtain current elevation, description, and/or location inforrmtion for bench
<br />marks shown on this map, please contact the Information Services Brarch of the
<br />National Geodetic Survey at (301) 713-3242, or visit its website at
<br />http://w:ww.n9J,.ngaa.go\(.. For information about additional control points
<br />maintained by Douglas County, please visit
<br />http://wwY{.tllij)licstagin-9J1ouglas.cQ.us/we!Lsli~contr91/vjewer . htn.
<br />
<br />Base map information shown on this FIRM was provided by the Douglas Courty
<br />GIS Department and the Town of Castle Rock GIS Department. Addtional input
<br />was provided by the City of Lone Tree and Town of Parker. These data are
<br />current as of 2003.
<br />
<br />This map reflects more detailed and up-to-date stream channel configurations
<br />and floodplain delineations than those shown on the previous FI RM for this
<br />jurisdiction. As a result, the Flood Profiles and Floodway Datatables in the Flood
<br />Insurance Study Report (which contains authoritative hydraulic cata) may reflect
<br />stream channel distances that differ from what is shown on this map. Also, the
<br />road to floodplain relationships for unrevised streams may diffe- from what is
<br />shown on previous maps.
<br />
<br />Corporate limits shown on this map are based on the best data available at the
<br />time of publication. Because changes due to annexations or deannexations may
<br />have occurred after this map was published, map users should cortact
<br />appropriate community officials to verify current corporate Iimt 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 repositOlY addresses;
<br />and a Listing of Communities table containing National Flood InaJrance Program
<br />dates for each community as well as a listing of the panels on Vlhich each
<br />community is located.
<br />
<br />Contact the FEMA Map Service Center at 1-800-358-9616 for information on
<br />available products associated with this FIRM. Available producB may include
<br />previously issued Letters of Map Change, a Flood Insurance Studyreport, and/or
<br />digital versions of this map. The Map Service Center may also re reached by
<br />Fax at 1-800-358-9620 and its website atbttp://www.msc.fema.gov.
<br />
<br />1510000 FT
<br />
<br />If you have questions about this map or questions concerning the National
<br />Flood Insurance Program in general, please call1-877-FEMA MAP (1-877-336-
<br />2627) or visit the FEMA website athttp://www.fema.gQ.y..
<br />
<br />Douglas County Vertical Datum Offset Table
<br />Vertical Datum
<br />Offset (ft)
<br />3.10
<br />3.22
<br />3.15
<br />3.93
<br />3.23
<br />3.26
<br />3.49
<br />3.71
<br />3.65
<br />3.12
<br />
<br />Flooding Source
<br />
<br />Baldwin Gulch
<br />Bayou Gulch
<br />Big Dry Creek Tributary C
<br />Carpenter Creek
<br />Cherry Creek, Cross Section BZ to CU
<br />East Plum Creek, Cross Section W to A Y
<br />East Plum Creek, Cross Section AZ to CZ
<br />East Plum Creek, Cross Section DA to EM
<br />Glade Gulch
<br />Happy Canyon Creek
<br />
<br />Vertical Datum
<br />Flooding Source Offset (ft)
<br />
<br />Newlin Gulch 3.14
<br />Plum Creek, Cross Section A to D 3.12
<br />Section 34 Tributary 3.62
<br />Sellers Gulch 3.43
<br />Sellers Gulch, Unnamed Tributary 3.39
<br />Sulphur Gulch 3.13
<br />Tallman Gulch 3.16
<br />West Plum Creek, Cross Selection W to AM 3.68
<br />
<br />Example: To convert Baldwin Gulch elevations to NAVD 88, 3.10 feet were added to the NGVD 29 elevations.
<br />
<br />Panel Location Map
<br />
<br />
<br />This digital Flood Insurance Rate Map (FIRM) was produced through a
<br />cooperative partnership between the State of Colorado Water Conservation
<br />Board, the Urban Drainage and Flood Control District, and the Federal
<br />Emergency Management Agency (FEMA). The State of Colorado Water
<br />Conservation Board and the Urban Drainage and Flood Control District have
<br />implemented a long-term approach of floodplain management to reduce the
<br />costs associated with flooding. As part of this effort, both the State of Colorado
<br />and the Urban Drainage and Flood Control District have joined in Cooperating
<br />Technical Partner agreements with FEMA to produce this digital FIRM.
<br />/i\QP-COoD""
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<br />
<br />104052'30"
<br />
<br />3180000 FT
<br />
<br />3185000 FT
<br />
<br />JOINS PANEL 0315
<br />
<br />x
<br />
<br />24
<br />
<br />22
<br />
<br />23
<br />
<br />+
<br />
<br />
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<br />
<br />GULCH
<br />
<br />RD
<br />
<br />EAST
<br />
<br />x
<br />
<br />26
<br />
<br />+
<br />
<br />+
<br />
<br />County
<br />Unincorporated Areas
<br />080049
<br />
<br />
<br />ZONE X
<br />
<br />+
<br />
<br />+
<br />
<br />34
<br />
<br />35
<br />
<br />36
<br />
<br />39013'07.5"
<br />104052'30"
<br />
<br />
<br />Additional flood hazard information and
<br />resources are available from local
<br />communities, the Colorado Water
<br />Conservation Board, and the Urban Drainage
<br />and Flood Control District.
<br />
<br />511000 M
<br />
<br />512000M JOINS PANEL 0453
<br />
<br />513 000 M
<br />
<br />104050'37.5"
<br />39015'00"
<br />
<br />
<br />
<br />ND
<br />
<br />SPECIAL FLOOD HAZARD AREAS (SFHAs) SUBJECT TO INUNDATION
<br />BY THE 10/0 ANNUAL CHANCE FLOOD
<br />
<br />The 1% annual chance flood (100-year flood), also known as the base flood, is the flood that has a
<br />1 % chance of being equaled or exceeded in any given year. The Special Flood Hazard Area is the
<br />area subject to flooding by the 1 % annual chance flood. Areas of Special Flood Hazard include
<br />Zones A, AE, AH, AO, AR, A99, V, and VE. The Base Flood Elevation is the water-surface elevation
<br />of the 1% annual chance flood.
<br />
<br />ZONE A
<br />ZONE AE
<br />ZONE AH
<br />
<br />ZONE AO
<br />
<br />ZONE AR
<br />
<br />ZONE A99
<br />
<br />
<br />No Base Flood Elevations determined.
<br />Base Flood Elevations determined.
<br />Flood depths of 1 to 3 feet (usually areas of ponding); Base Flood Elevations
<br />determined.
<br />Flood depths of 1 to 3 feet (usually sheet flow on sloping terrain); average
<br />depths determined. For areas of alluvial fan flooding, velocities also determined.
<br />Special Flood Hazard Areas formerly protected from the 1% annual chance
<br />flood by a flood control system that was subsequently decertified. Zone AR
<br />indicates that the former flood control system is being restored to provide
<br />protection from the 1% annual chance or greater flood.
<br />Area to be protected from 1% annual chance flood by a Federal flood protection
<br />system under construction; no Base Flood Elevations determined.
<br />
<br />FLOODWAY AREAS IN ZONE AE
<br />
<br />The floodway is the channel of a stream plus any adjacent floodplain areas that must be kept free of
<br />encroachment so that the 1% annual chance flood can be carried without substantial increases in
<br />flood heights.
<br />
<br />
<br />4344000 M
<br />
<br />ZONE X
<br />
<br />
<br />ZONE X
<br />ZONE 0
<br />
<br />OTHER FLOOD AREAS
<br />
<br />Areas of 0.2% annual chance flood; areas of 1% annual chance flood with
<br />average depths of less than 1 foot or with drainage areas less than 1 square
<br />mile; and areas protected by levees from 1% annual chance flood.
<br />
<br />OTHER AREAS
<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 />Floodplain boundary
<br />Floodway boundary
<br />Zone 0 boundary
<br />
<br />
<br />..
<br />
<br />Boundary dividing Special Flood Hazard Area zones and
<br />boundary dividing Special Flood Hazard Areas of different Base
<br />Flood Elevations, flood depths or flood 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 />(EL 987)
<br />
<br />~ 513 --
<br />
<br />*Referenced to the North American Vertical Datum of 1988
<br />
<br />o
<br />
<br />@
<br />
<br />Cross section line
<br />
<br />4276000 M
<br />3180000 FT
<br />
<br />Geographic coordinates referenced to the North American
<br />Datum of 1983 (NAD 83), Western Hemisphere
<br />
<br />1000-meter Universal Transverse Mercator grid ticks, zone 13
<br />
<br />SOOO-foot ticks: Colorado State Plane coordinate
<br />system, central zone (FIPSZONE 502), Lambert Conformal
<br />Conic projection
<br />
<br />National Geodetic Survey bench mark (see explanation in
<br />Notes to Users section of this FIRM panel
<br />
<br />1040 50' 37.5" , 390 30' 00"
<br />
<br />4343000 M
<br />
<br />N
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<br />~
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<br />
<br />X KK6400
<br />
<br />MAP REPOSITORY
<br />Refer to listing of Map Repositories on Map Index
<br />
<br />EFFECTIVE DATE OF COUNTYWIDE
<br />FLOOD INSURANCE RATE MAP
<br />SEPTEMBER 30, 2005
<br />
<br />EFFECTIVE DA TE(S) OF REVISION(S) TO THIS PANEL
<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 />To determine if flood insurance is available in this community, contact your insurance agent or call
<br />the National Flood Insurance Program at 1-800-638-6620.
<br />
<br />4342000 M
<br />
<br />39013'07.5"
<br />104050'37.5"
<br />
<br />
<br />250
<br />
<br />MAP SCALE 1" ::: 500'
<br />500
<br />
<br />1000
<br />FEET
<br />
<br />o
<br />
<br />
<br />METERS
<br />300
<br />
<br />150
<br />
<br />150
<br />
<br />o
<br />
<br />
<br />
<br />I
<br />
<br />
<br />FLOOD INSURANCE
<br />
<br />DOUGLAS COUNTY,
<br />COLORADO
<br />AND INCORPORATED AREAS
<br />
<br />
<br />PANEL 451 OF 495
<br />(SEE MAP INDEX FOR FIRM PANEL LAYOUT)
<br />
<br />CONTAINS
<br />
<br />NUMBER
<br />
<br />PANEL
<br />
<br />SUFFIX
<br />
<br />COMMUNITY
<br />
<br />DOUGLAS COUNTY
<br />
<br />080049
<br />
<br />0451
<br />
<br />F
<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 />MAP
<br />08035C0451F
<br />
<br />
<br />
<br />EFFECTIVE
<br />SEPTEMBER 30,
<br />
<br />
<br />Federal Emergency Management Agency
<br />
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