Roundy Canyon
Seaman Canyon Low
Ca
n nyo
es ak L r
C re ek
Le
e ng Va
er
sh Ru
Kan
ab
Alton
eate r phith
East
East Alton Sprin g
Alto
n Am
Fork Virgin
River
KANE COUNTY
Alto prin
nS g
on al d
R Lower
Ca
ny o
n obinso
Creek
n
NATIONAL FLOOD INSURANCE PROGRAM BLE HYDRAULICS WORK MAP DRAFT GREATER SEVIER PROJECT AREA GARFIELD, JUAB, KANE, MILLARD, PIUTE, SANPETE, AND SEVIER COUNTIES, UTAH RISK MAP PROJECT Town of Alton
! C ! A
Stream Gauges
Municipalities
Letters of Map Amendment (LOMA)
10/4/2023
Effective Floodway (1%-annual-chance flood)
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0
Private
Effective Zone AO (1%-annual-chance flood) Effective 0.2%-annual-chance flood
US Forest Service
!
!
No Color
Tribal
!
Alluvial Fan Counties
National Park Service
Effective Zone AE (1%-annual-chance flood)
!
Draft BLE Zone A***
CACHE
* Streams with a drainage area greater than 1 square mile
Wyoming
WEBER
** Floodplain cleanup and refinement within unincorporated areas to occur after Discovery. These areas mainly constitute state and federal land ownership.
52
RICH
BOX ELDER
Panguitch
53
IRON
MORGAN DAVIS SUMMIT
DAGGETT
57
UINTAH
64
58
Hatch
54 59
SALT LAKE TOOELE
WASATCH DUCHESNE
Study Streams Outside Initial Refinement Area**
LiDAR Acquisition Area (2014-2019) Project Area
State Land
COUNTY MAP LOCATOR
500
I 1,000 Feet
2,000
***Draft 2023 hydraulic analysis using new LiDAR topography (no ground survey conducted, Tribal Lands excluded). Floodplain delineations are draft and subject to change. All base information on this map sourced from public data, including the Utah Geospatial Resource Center (UGRC), FEMA, ESRI, and USGS.
Note: This map is not an official Flood Insurance Rate Map and the data presented on this map is for draft information only, to be used as best available data where applicable.
UTAH
JUAB CARBON SANPETE MILLARD EMERY
GRAND
SEVIER
BEAVER
IRON
PIUTE
WAYNE
71
65
Alton
Glendale
66
55
Tropic Cannonville
73
72
78
79
80
85
86 Kanab
87
56
60
61
62
63
67
68
69
70
74
75
76
77
81
82
83
89
90
KANE
SAN JUAN Big Water
88
KANE
Arizona
Escalante
GARFIELD
Henrieville
Orderville
GARFIELD SAN JUAN
WASHINGTON
Colorado
Draft Zone A Base Level Engineering (BLE) Results Utah Division of Emergency Management
BLM and Other Federal Land
Effective Zone A (1%-annual-chance flood)
Proposed Detailed Study Area (TBD)
RELEASE DATE
Land Ownership
Effective NFIP Floodplains
Study Streams*
STUDY LOCATOR
NOTES TO USERS
MAP SYMBOLOGY
Nevada
M cD
Arizona
84