North Fork Lewis River - Map Revision

FIRMs 53011C0061D and 53011C0062D

A hydraulic analysis was performed on a portion of the North Fork Lewis River, specifically between River Mile (RM) 7.69 and RM 8.61, utilizing new ground topography. The study resulted in revised floodplain boundaries (floodway, 100-year floodplain and 500-year floodplain) for FIRMs 53011C0061D and 53011C0062D in Clark County. The revised boundaries have been confirmed by the Federal Emergency Management Agency (FEMA).

PW Flood Map Revision

A report of the study and a working map of the upcoming changes can be found at the links below.

Additional information on floodplain mapping, regulations, and resources can be found at the following linked page on the Clark Regional Emergency Services Agency’s (CRESA) website: