FLOOD07959

• County: Summit
• Community: Summit County and Unincorporated Areas
• Basin: Colorado Mainstem
• Title: FIRM - Summit County and Unincorporated Areas - Panel 109C
• Date: 8/9/2001
• Prepared For: Summit County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

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ZONE X

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JOINS PANEL 0107

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NOTE TO USER: THE BASE (100-YEAR) FLOOD ELEVATIONS (SFEs)
FOR FLOODING SOURCES IN THE TOWN OF SILVERTHORNE,
COLORADO, ARE REFERENCED TO THE NORTH AMERICAN VERTICAL
DATUM OF 1988, THE BFEs FOR FLOODING SOURCES IN SUMMIT
COUNTY, COLORADO, ARE REFERENCED TO THE NATIONAL GEO-
DETIC VERTICAL DATUM OF 1929. THE USE OF TWO DIFFERENT
DATUMS CREATES MISMATCHES IN BFEs AT TIE-IN LOCATIONS
BETWEEN AREAS SHOWN ON BOTH FiRMS.

TOWN
AR

OF SILVERTHORNE
NOT INCLUDED

3

ZONE X

Willow

ZONE X

ZONE X
ZONE AE~
(EL 8685)
FLOODING EFFECTS
FROM WillOW CREEK
ZONE X
ZONE X

ZONE X

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flOODING EFFECTS
FROM WilLOW CREEK

ZONE X

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BROOK

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T5S

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ERM elevations listed on this map obtained andlor developed
to establish vertical control for determination of flood elevations and
boundaries portrayed on this map. Users should be aware
ERM elevations have changed since the publication
obtain elevato'! information on National
Geodetic (NGS) shown map, contact
the Information Services Branch of NGS
or visit their website
seek verification non~NGS monument
using these elevations for construction or floodplain
purposes.

Coastal shown on
NGVD. Users of this FiRM
elevations are also provided in
table in the Flood Insurance
shown in the Summary Elevations
should be used for construction, and lor floodplain management
vvhen they are higher than the elevations shown on this

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NATIONAL

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TOWN OF DILLON
AREA NOT INCLUDED

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SPECIAL FLOOD HAZARD AREAS INUNDATED
BY 100-YEAR FLOOD
ZONE A No base flood elevations determined.

ZONE AE

Base flood elevations determined.

ZONE AH

Flood
of

of 1 to 3 (usually areas
base flood elevations

ZONE AO Flood depths ofl to 3 feet (usually sheet
flow on terrain); average
determined. areas of alluvial fan
velocities also determined.

ZONE A99 To be frorn 100-year flood by
Federal protection system under
construction ; no base flood elevations
determined.

ZONE V

Coastal flood with
action); no base flood

hazard (wave
determined.

ZONE VE

Coastal flood with
action); base flood

hazard (wave
determined.

FLOODWAY AREAS IN ZONE AE

OTHER FLOOD ARE;'\S

ZONE X of
flood with
'1 foot or with
square mile; and
from 100-vear flood.

OTHER AREAS

ZONE X Are,lS determined to be outside
floodplain.

ZONE D

Ar'eas in which flood hazards are
undetermined.

UNDEVELOPED COASTAL BARRIERS

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Identified Identified Otherwise
1983 '1990 Protected Areas
Coastal barrier areas are normally located within or adjacent to Special
Flood Hazard Areas

Floodplain Boundary

Floodway Boundary

Zone D Boundary

Boundary

Dividing Special Flood
Zones, and Boundary
Areas of Different
Base Flood Elevations
Special Flood Hazard

Dividing
Coastal
Within

~513~

Flood Elevation Line;
Elevation Feet. See Map Index
for Elevation Datum

Cross Section Line

Base Flood Elevation in Feet
INhere Uniform Within Zone.
See Map Index for Elevation Datum

Elevation Reference Mark

(EL 987)

RM7X
.. M2

River Mile

97007'30". 32022'30"

Horizontal Coordinates Based on North
American Datum of 1927 (NAD
Projection.

NOTES

This map is for use in administering the National Flood
it does not necessarily identify all areas subject to
local drainage sources of small or all
Special Flood Hazard Areas. The
consulted for more detailed data on
delineations, prior to use of
purposes.

outside
repository should be
any information on
property purchase or

of Special Flood Hazard (100-year flood) include Zones A, AE,
A30, AH, AO, A99, V, VE and V1-V30.

Certain areas not in Special Flood Hazard Areas may be protected by
flood control structures.

Boundaries of the floodways were computed at cross sections and
interpolated between cross sections. The floodways based on
considerations with regard to requirements of the Federal
Management Agency.

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widths in some areas
Data Table where

be too narrow to show to scale. Refer
width is shown at no inch

Coastal base flood elevations
the of wave
from those developed
evacuation planning.

Corporate limits shown current
should contact appropnate community
limits have changed subsequent

date thiS
to determine
Issuance of

user
corporate
this map

This map may
Resource
under the

Coastal
Protected Areas established
of 1990 101-591)

For adjoining map
Map index.

printed

I Maps not
iNITIAL IDENTIFICATION:
SEPTEMBER 13,1977
FLOOD HAZARD BOUNDARY MAP REVISIONS:
FLOOD INSURANCE RATE MAP EFFECTIVE:
DECEMBER 16,1980
FLOOD INSURANCE RATE MAP REVISIONS:

Map revised August 9, 200"1 to corporate limits, to
flood elevations, flood harzard to
format, to add roads names, updated
information, and to change floodway.

To determine if flood insurance is available, contact
call the National Flood Insurance Program [phone].

agent or

.

APPROXIMATE SCALE IN FEET
500 0 500
r-----; t---i t---i I

. NATIONAL

INSURANCE PROGRAM

MAP

(UNINCORPORATED AREAS)

NUMBER
080290 0109 C

MAP
AUGUST 9, 2001

Federal Emergency Management Agency