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Legend (map_services/MAP_ANR_ANRATLASRIVERSPROGRAM_WM_NOCACHE)

Hazard Class (2)
High Hazard Potential High Hazard Potential
Significant Hazard Potential Significant Hazard Potential
Low Hazard Potential Low Hazard Potential
Minimal Hazard Potential Minimal Hazard Potential
Undetermined Hazard Potential Undetermined Hazard Potential
Historical Dam Location (3)
Dam Flowage Sites (30)
Dam Inundation Sites (33)
Stream Alterations Open EPMs (4)
DFIRM X-Sections (5)
Dam Flowage Contours (31)
Easement Easement
Dam Dam
Spillway Spillway
DFIRM - Letter of Map Revision (LOMR) (6)
(effective 7.28.2008) (effective 7.28.2008)
DFIRM Panels (7)
DFIRM Floodways (8)
(effective 7.2011) (effective 7.2011)
DFIRM Flood Hazard Areas (Only FEMA-digitized data) (9)
AE (1-percent annual chance floodplains with elevations) AE (1-percent annual chance floodplains with elevations)
A (1-percent annual chance floodplains without elevations) A (1-percent annual chance floodplains without elevations)
AO (1-percent annual chance zone of shallow flooding 1-3 feet) AO (1-percent annual chance zone of shallow flooding 1-3 feet)
0.2-percent annual chance flood hazard zone 0.2-percent annual chance flood hazard zone
Flood Hazard Areas (Approximate Locations 8/24) (35)
River Corridors (Aug 27, 2019) (11)
.5 - 2 sqmi. (27)
.25-.5 sqmi. (26)
River Corridor Easement (13)
River Management Engineer Districts (14)
Floodplain Manager Regions (15)
Dam Flowage Areas (32)
Dam Dam
Spillway Spillway
Dam Inundation Areas (34)
Flooding Flooding
Storm-day Break Storm-day Break
Sunny-day Break Sunny-day Break
Probable Maximum Flood- No Dam Break Probable Maximum Flood- No Dam Break
Probable Maximum Flood - Dam Break Probable Maximum Flood - Dam Break