FLOOD10515

• County: Archuleta
• Community: Archuleta County and Unincorporated Areas
• Title: FIRM - Archuleta County and Unincorporated Areas - Panel 425B
• Date: 1/3/1979
• Prepared For: Archuleta County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

KEY TO MAP

SOO-Year Flood Boundary
100- Year Flood Bou nd ary

Zone Designations* With
Date of Identification
e.g., 12/2/74

l'OO-Year Flood Boundary

SOO-Year Flood Boundary

Base Flood Elevation Line
With Elevation In Feet**

~~ ~ 513..-

Base Flood Elevation in Feet
Where Uniform Within Zone**

(EL 987)

River Mile

RM7X
· M 1.5

Elevation Reference Mark

Southern Ute
Indian Reservation
(,AREA NOT 11\JCLUDEDl

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** Referenced to the National Geodetic Vertical Datum of 1929

*EXPLANA TION OF ZONE DESIGNATIONS

. . . .------.

ZONE
A

EXPLANA TION

Areas of lOa-year
flood hazard factors not

AO Areas of laO-year shallow
are between one (1) and three
of inundation are shown, but no
are determined.

elevations and

ZONE C

Areas of 100-year shallow
are between one (1) and
elevations are shown, but no
are determined.

A 1-A30 Areas of 100-year flood; base flood elevations and
flood hazard factors determined.

AH

~

Areas of 100-year flood to be protected by flood
protection system under construction; base flood
elevations and flood hazard factors not determined.

B Areas between limits of the 1 OO-year flood and 500-
year flood; or certain areas subject to 100-year\f!00d-
ing with average depths less than one (1) foot or where
the contributing drainage area is less than one square
mile; or areas protected by levees from the base flood.
(Medium shading)

C Areas of minimal flooding. (No shading)

D Areas of undetermined, but possible, flood hazards.

V Areas of 100-year coastal flood with velocity (wave
action); base flood elevations and flood hazard factors
not determ ined.

V1-V30 Areas of lOa-year coastal flood with velocity (wave
action); base flood elevations and flood hazard factors
determ ined.

A99

SAN JUAN NATIONAL FOREST

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NOTES TO USER

Branch
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Certain areas not in the special flood hazard areas (zones A and V)
may be protected by flood control structures.

This map is for flood insurance purposes only; it does not neces-
sarily show all areas subject to flooding in the community or
all planimetric features outside special flood hazard areas.

For adjoining map panels, see separately printed Index To Map
Panels.

BLANCO

INITIAL IDENTIFICATION
JULY 5,1977

Bridge No.4

CONVERSION TO REGULAR PROGRAM
JANUARY 3,1979

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ZONE B '7050
.of-) 7055
~:'j/ 7059
G( 7065
: 7070

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I ZONE B
I ZONE B
6570

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Southern Ute
Indian
Reservation
(.6..REA NOT
INCLUDED)

Refer to the CONVERSION TO REGULAR PROGRAM date
shown on this map to determine when actuarial rates apply to
structures in the zones where elevations or depths have been
established.

To determine if flood insurance is available in this community,
contact your insurance agent, or call the National Flood Insurance
Program) at [phone], or [phone].

.

ZONE C

APPROXIMATE SCALE
2000 0 2000 FEET
f----j f----j f----j -==:J

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SAN JUAN NATIONAL FOREST

REFERENCE ELEVATION
MARK (FT. NGVD)
RlVI28 6861.68
RM29 6972.68
RM30 6982.62
RM31 6987.41
RM32 7111.00

DESCRIPTION OF LOCATION

NA TIONAl FLOOD INSURANCE PROGRAM

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SAN JUAN NATIONAL FOREST

ZONE C

Southern Ute
Indian
Reservation
(AFiEA NOT
II\!CLUDEDI

EV A TION REFERENCE MARKS

A nail in the last plank in the northeast corner of Bridge No.1 over
the Rio Blanco_ (Nelson, Haley, Patterson, and Quirk, Engineering
Consultants)

The steel frame of the northwest corner of Bridge No.2 over the
Rio Blanco. (Nelson, Haley, Patterson, and Quirk, Engineering
Consu I tan ts)

A U.S. Department of Agriculture bench mark stamped 6982. 62,
in the southeast corner of U.S. Highway 84 Bridge A over the Rio
Blanco.

I
FLOOD INSURANCE RATE MAP

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The furthest southwest nail in the southwest corner of Bridge No.
3 over the Rio Blanco. (Nelson, Haley, Patterson, and Quirk, Engi-
neering Consultants)

A U.S. Geological Survey bench mark (Av 1954) starnped 7111
on the east end of Bridge No. S over the Rio Blanco.

ARCHULETA COUNTY,
COLORADO
(UNINCORPORATED AREAS)

PANEL

OF 625

(SEE MAP INDEX FOR PANELS NOT PRINTED)

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Southern Ute Indian Reservation

U.S. DEPARTMENT OF HOUSING
AND URBAN DEVELOPMENT
FEDERAL INSURANCE ADMINISTRATION