FLOOD07482

• County: Gilpin
• Community: Black Hawk
• Basin: South Platte
• Title: FIRM - Black Hawk - Only Panel Printed
• Date: 10/16/1984
• Prepared For: Gilpin County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

KEY TO MAP

ELEVATION REFERENCE MARKS

SOO-Year Flood Boundary--
100-Year Flood Boundary

7930.76

DESCRIPTION OF LOCATION
U.S. Coast and Geodetic Survey disk, located 0.3 mile west along
State Highway 119 from State Highway 279 junction at Gregory
Gulch, 19 feet southeast of centerline, 7 feet southwest of promi-
nent vertical ridge, in the top of the southwest face of large sloping
rock, 2 feet higher than road.
U.S. Coast and Geodetic Survey disk located at Central City, on
road leading from State Highway 279 to State Highway 119; in the
southeast curb of concrete bridge over Eureka Creek (Gregory
Gulch Tributary) near the Black Hawk-Central City boundary.
U.S. Geological Survey disk located 34 feet east of the centerline
of State Highway 119 and Gregory Gulch State Highway 279
junction, on a small ledge, 3.5 feet higher than road.
U.S. Geological Survey chiseled square located on northwest end
on concrete box culvert over Silver Creek on State Highway 119,
Silver Creek is the first draw entering from the north and just
downstream of the Black Hawk Treatment Plant.

100-Year Flood Boundary---
SOO-Year Flood Boundary

Zone Designations*

REFERENCE
MARK
RM1

ELEVATION
(FT. NGVD)
8100.522

RM2

8241.749

Base Flood Elevation Line
With Elevation In Feet**

513

Base Flood Elevation in Feet
Where Uniform Within Zone**

(EL 987)

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RM3

8055.871

Elevation Reference Mark

RM7X

ZONE C

Zone D Boundary

RM4

River Mile

eM1.5

**Referenced to the National Geodetic Vertical Datum of 1929

*EXPLANATION OF ZONE DESIGNATIONS

ZONE
A

EXPLANA TION

B

Areas of 100-year flood; base flood elevations and
flood hazard factors not determined.

Areas of 100-year shallow flooding where depths
are between one (1) and three (3) feet; average depths
of inundation are shown, but no flood hazard factors
are determined.

Areas of 100-year shallow flooding where depths
are between one (1) and three (3) feet; base flood
elevations are shown, but no flood hazard factors
are determined.

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

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

Areas between limits of the] OO-year flood and 500-
year flood; or certain areas subject to 1 OO-year flood-
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)

Areas of minimal flooding. (No shading)

Areas of undetermined, but possible, flood hazards.

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

Areas 100-year coastal flood with velocity (wave
base flood elevations and flood hazard factors

ZONE C

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AO

AH

ZONE C

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ZONE B ~
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A1-A30

A99

STATE HIGHWAY 119

C
D
V

19"
GOLDEN GILPIN ;,>
MILL BRIDGE

V1-V30

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ZONE C

NOTES TO USE R

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.

MARCHANT

ZONE C

LIMIT OF
STUDY

INITIAL IDENTIFICATION:

ZONE C

FLOOD INSURANCE RATE MAP EFFECTIVE:
OCTOBER 16, 1984

LIMIT OF
DETAILED STUDY

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FLOOD INSURANCE RATE MAP REVISIONS:

LIMIT OF
STUDY

ZONE C

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Refer to the FLOOD INSURANCE RATE MAP EFFECTIVE date
shown on this map to determine when actuarial rates apply to
structures in the zones where elevations or depths have been estab-
lished.

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

Unnamed Tributary to
North Clear Creek

APPROXIMATE SCALE
400 0
L-t------t I-------J

400 FEET
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ZONE C

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ZONE B

. NATIONAL FLOOD INSURANCE PROGRAM

ZONE C

I
FLOOD

RATE

LIMIT OF
STU D Y

CITY OF
BLACK HAWK,
COLORADO
GILPIN COUNTY

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ONt Y PANEL PRINTED

CORPORATE LIMITS

COMMUNITY.PANEl
080076

o BER16,1

Federal Emergency Management Agency