FLOOD10485

• County: Alamosa
• Community: Alamosa
• Title: FIRM - Alamosa - Panel 2C
• Date: 4/21/1999
• Prepared For: Alamosa
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

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ELEVATION
(FT. NGVD)

7541.090

7535.470

7538.197

*OUTSJDE STUDY AREA

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ELEVATION REFERENCE MARKS

DESCRIPTION OF LOCATION

At the city water tower, on the north side, and in the top of the
concrete pier; a U.S. Geological Survey standard disk, stamped
7543.22.

At intersection of State Avenue and Seventeenth Street, 0.8 mile
south of Denver and Rio Grande Western Railroad depot, located
di rectly in line with south edge of Seventeenth Street, 21 feet east
of centerline of State Avenue, 10 feet west of large powerline pole,
and 1.5 feet south of a fence corner; a standard bench mark disk,
stamped H 364 1964, set in top of 12-inch concrete post projecting
3 inches above ground.

Approximately 1.3 miles south along the Denver & Rio Grande
Western Railroad from Alamosa, Alamosa County, approximately
180 yards south of the south head block in the freight classification
yard, 5 feet northeast of milepost 253, approximately 162 yards
from a road crossing and 12 feet west of the centerline of the track;
a standard disk,stamped 7538.197 D 33 1933,setin top of
concrete post projecting approximately 10 inches above ground.

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This t" ., from the 0 ~~ fJ'OJvOln. annual .
(100 - y'aai} ifl ucd by levee, dik~. or other structures
to possible 1la ilure or ,",vO'. larger floo<<l!

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ALAMOSA MUNICIPAL
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CORPORATE LIMITS

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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 depths of 1 to 3 feet (usually areas of
ponding); base flood elevations determined.

ZONE AO Flood depths of 1 to 3 feet (usually sheet flow
on sloping terrain); average depths deter-
mined. For areas of alluvial fan flooding:
velocities also determined,

ZONE A99 To be protected from 100-year flood by
Federal flood protection system under con-
struction; no base flood elevations deter-
mined.

ZONE V Coastal flood with velocity hazard (wave
action); no base flood elevations determined.

ZONE VE Coastal flood with velocity hazard (wave
action); base flood elevations determined.

FlOODWAY AREAS IN ZONE AE

OTHER FLOOD AREAS

ZONE X

Areas of SOO-year flood; areas of l00-year
flood with average depths of less than 1 foot or
with drainage areas less than 1 square mile;
and areas protected by levees. from l00-year
flood. .

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OTHER AREAS
Z ON E X Areas determined to be outside SOO-year flood-
plain.

ZONE D

Areas in which flood hazards are undeter-
mined.

UNDEVELOPED COASTAL BARRIERSt

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Identified
1983

Identified
1990

Otherwise
Protected Areas

tCoastal barrier areas are normally located within or adjacent to special flood
hazard areas.

Floodplain Boundary
- - - - Floodway Boqndary

Zone D Boundary

J.2d

Boundary Dividing Flood Hazard
Zones, and Boundary Areas of Dif.
ferent Coastal Base Flood Elevations Within
Special Flood Hazard Zones.

Base flood Elevation Line; Elevation in Feet*

513- -
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(EL 987)

Cross Section Line

Base Flood Elevation in Feet Where Uniform
Within Zone*

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River Mile

Elevation Reference Mark

*Referenced to the National Geodetic Vertical Datum of 1929

NOTES

This map is for use in administering the National Flood Insurance Program;
it does not necessarily identify all areas subject to flooding, particularly from
local drainage sources of small size, or all planimetric features outside
Special Flood Hazard Areas. The community map repository s:lould be
consulted for more detailed data on BFEs, and for any information on
t100dway delineations, prior to use of this map for property purchase or
construction purposes.

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

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

Boundaries of the f100dways were computed at cross sections and
interpolated between cross sections. The Hoodways were based on
hydraulic considerations with regard to requirements of the Federal
Emergency Management Agency.

Flooctwaywidths in some,areas may be too narrow to show to scale. Refer
to Floodway Data Table where Hoodway width is shown at 1/20 inch.

Coastal base flood elevations apply only landward of 0.0 NGVD, and
include the effects of wave action; these elevations may also diff~r
significantly from those developed by the National Weather Service for
hurricane evacuation planning.

Corporate limits shown are current as of the date of this map. The user
should contact appropriate community officials to determine if corporate
limits have changed subsequent to the issuance of this map.

F or adjoining panels, see separately printed Map Index.

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MAP REPOSITORY
Public Works Department
314 Hunt Avenue
Alamosa, Colorado 81101
(Maps available for reference only, not for distribution.)

INITIAL IDENTIFICATION:
MAY 24,1974

FLOOD HAZARD BOUNDARY MAP REVISION:

FLOOD INSURANCE RATE MAP EFFECTIVE:
SEPTEMBER 15.1977

FLOOD INSURANCE RATE MAP REVISIONS:
NOVEMBER 9.1982

Map revised April 21 , 1999 to update corporate limits, to change base flood
elevations, to change zone designations, to update map format, and to
update roads and road names.

To determine if flood insurance is
insurance agent or call the National

in this community, contact your
Insurance Program at [phone].

APPROXIMA TE

LE IN FEET

400

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INSURANCE PROGRAM

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MAP

I CITY
I

OSA,
CO R,ADO
ALAMOSA COUNTY

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NUMBER
080010 0002 C

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I Federal Emergency Management Agency

REVISED:
l 21, 1999