FLOOD00895

• County: Adams
• Community: Thornton
• Stream Name: Grange Hall Creek
• Title: FIRM - Thornton - Revised Panel 45G
• Date: 4/22/1997
• Prepared For: Thornton
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

A

B

ELEVATION REFERENCE MARKS
REFERENCE ELEVATION
MARK (FEET NGVD) DESCR.PTION O' LOCATION
RM5 5051.25 Bro.. cap louthw..' corn.r 0'
Fulton Ollch .rldge at Its cro..lng
with Ea't 104th Avenue.
1M.. 5100.'. Chl,.I.d aquat. on north abutment
of bridge acro.. irrigation ditch,
approxlmat.ly 10 f..' north and 36
, .. t we. , from I un c I Ion 0 f 1 04' h
Avenue and Rlverdal. Roadl U.S.
Geological Survey.

6:

104056'15"
39"56'15'"

c

o

E

F

G

8
~

JOINS PANEL 0035
ADAMS COUNn
UNlNCORPOlATED AREAS
0lO0OI

104052'30"
39056'15"

ADAMS OOUNTY
UNINCORPORATED AREAS
0lO001

CITY OF THORNTON
080007

RIVEROALE

29

NOTE: MAP AREA SHOWN ON THIS PANEL
IS LOCATED WITHIN TOWNSHIP 1 SOUTH,
RANGE 67 WEST AND TOWNSHIP 2 SOUTH,
RANGE 67 WEST.

~ADAIlSCOUNn
UNINCORPORATED AJtRAS
010001

~
:>
a

,

BACHMAN ~
ORIVE~ ._J

AVENUE

18

EAST

lOOTH

ADAM.S COUNTY
UNINCORPORATED AREAS
0lO001

39"52'30"
104"56'15'"

39052'30"
104052'30"

5633

LEGEN D

SPECIAl flOOD HAZARD AREAS INUNDATED
BY 100-YEAR flOOD

ZONE A No base flood t4evations detennined.

ZONE AE Base f\ood elevations determined.

ZONE AH F100d depths of 1 to 3 feet (~1Iy areas
of pondingl; base flood elewtions
detennmed.

ZONE AO Rood depths cl 1 to 3 feet (usu.i.Ily sheet
flow on sioping lernlin); .average depl:h5
determined. For .reOA of alluvlal fan flooding..
velocities also detetmined.
ZONE A99 T~ be proIeaed ~ 1<lO-yeM flood by
Federal flood protection system under
COl"l5t1\Idion; no ba5e emtlons determined.

ZONE V Coa.sW flood with velocity hazard (waYe
action); no base flood elevations determined.

~z~
;~X.,,:~:, ,;;,~-, x'
/ "" .::;l.'. ,.:.'.

ZONE VE CoasaI flood with velocity hazMd (wne
action); base f\ood elevations determined.
FLOODWAY AREAS IN ZONE AE

OTHER FLOOD AREAS
ZONE X Nus of 5l)()...yev flood; areaS r:J 1lX)--year
flood with eVElragE' depths of less than
1 fact or with dr.JiOilge .arus less than
1 iQl.W'e mile; and Me~ proleded by
bees from 100-year flood.

c:=J

OTHER AREAS
ZONE X Areas determined to be outside 5(l()...ye.ar
lloodpWn.

ZONE D

Areas in wtlidl flood h.aurds
undetermined.

UNDEVELOPED COASTAl BARRIERS

/~ ~

Identified identified
1983 1990
Coastal barrier areas are normany located
flood Hazard Areas.

~

Otheowbe
Proted2d ^'""
within or adjacent 10 Special

flood Boundary

FIOodw.y Boundary

Zone 0 Boundary

Boundary Dividing Special Flood
Hazard Zones. and Boundary
Dividing Areas of DillerAnt
COlstal Base flood Elewtions
Within Special Flood Huard
Zon...
Bas. Rood EltMltion Line;
Elevltion In Faet. See Map Index
for EleVation Datum.
Cross Section Una
Base Rood Elevation '" Feet
VVhere Uniform Within Zone.
Se. Map Index fot EleV81ion D.1um.
Elevation RaferetlCe Marie.
River Mile
Horizontal Coordinales Based on Nonh
American Da1um 01 1927 (NAn 271
Projection.

~513~

@

@

IEL 987)

RM7X
. M2

91007'30",32022'30"

NOTES
This map is for use In administering the National Flood Insurer.:e Program;
h does not necessarily kSentily .11 Ireas subject to flooding, particularty Itom
local drlinage SOUtces of small all.. or all planimetric features oubide
Special Flood HaIlrd Areas.
Coutll base flood .liMltionl apply onty landward of 0.0 NGVD,lnd Include
the Iff8Ctl of Wive ~Ion; the.e elevations may also differ slgnifIcerrtly
from those developtd by the National Weather Service for hurrlcane
evacultion planning. .
Ar..s of Special FlOod Hazard (1ClO-yelt flood) Include Zones A. AE. AH. AD.
A99, V, and VE.

CertaIn areas not In Special Flood Hazard Areas may be protected by
flood control struC'tLlrel.

Boundaries of the f100dway. were computed at cross sections Ind
lntlf'POlated between cross sections. 'the f1oodw8ys were besed on
hydraulic conside,..tiona with regard to requirements 01 tne Federal
Emerge"cy Management, Agency. .

Roodw.y wld1hs In some are.. may be too narrow to show to scala.
Aoodwey widths are provided In the flood Insurance Study Report.

Thlt map may incotpOrBte approximate boundaries of Coastal Barrier
R8'Soure. System Units and lor Othll'Nise Protected Ateas established
~nd&r th. Coastal S.mer Improvem.-.t Act of 1990 IPL 1cn-691).

Corporate limits shown ar. current I' of the date 01 this mlp. The u,er
~h~uld contact epptopriet. 'community official, to determine If corporet.
limIts hive changed 8ubaequen1 to the issuance of thia map.

For .community map r.vlslon history prior 10 countywide mapping. lee
Section 6.0 of the Flood lnsurence Study Report.

For Idjoining map panell Ilnd bese map source see sepannely printed
Map Index.

MAP REPOSITORY
Aefer to Repository Usting on Map Index

EFFECTIVE DATE OF
COUNlYWIDE FLOOD INSURANCE RATE MAP:

AUGUST 16. 1995

EFFECTIVE DATEISIOF REVlSION{SlTO THIS PANEL:

Refer ,to the FLOOD INSURANCE RATE MAP EFFECTIVE DATE shown
on this map to determine when IctLlarial rates appty to sttuctures in
zones where elavations Of depths have been established.
To determine if flood Insurancl is Ivaileble, contact an insurance agent or
call the National Flood Insurllnce Ptogram at [phone].

..

APPROXIMATE SCALE IN FEET
1000 0 1000
-- - -- .

NATIONAL fLOOO INSURANCE PROGRAM
. .

FIRM
flOOD INSURANCE RATE MAP

ADAMS COUNTY,
COLORADO AND
INCORPORATED AREAS

ISEE MAP INDEX FOR PANELS NOT PAINTED)

NUMBER PANEL SUFFIX

080001 00<5
000004 00<5
080006 00<5
0e0007 00<5

. ..
.. ~.

Rr.'R"ii f..C, - "'" ~ R
fil... ~:':'i ,_ ~ ~',"
~t;; 1",.. < ;.olj,ti'iiH
D ~ <r.,~~ f\; APR 2 2 1997
,l'l1;"'L
. ~ e L.~.g MAP-iiuMBER
0800lC0045 G

EFFECTIVE DATE:
,AUGUST 16,1995

FederaiI Emergency Management Agency