Article 10. Frequently Flooded Areas
14.100.300 Frequently Flooded Areas—Designation.
A. All areas within the city that have been accurately delineated based on hydrologic and hydraulic studies completed by the Federal Emergency Management Agency in 1984, and as subsequently revised and amended are hereby designated critical areas and are subject to the provisions of this chapter. The flood areas are classified as one (1) of three (3) types:
1. Floodway. Floodways are defined as the channel of a stream and adjacent land areas which are required to carry and discharge the flood water or flood flows of any river or stream associated with a regulatory flood;
2. Floodway Fringe. The flood fringe is defined as that land area which is outside a stream’s floodway but is subject to periodic inundation due to flooding associated with a regulatory flood.
3. Future Flow Floodplain. The channel of the stream and that portion of the adjoining floodplain that is necessary to contain and discharge the base flood flow at build out.
B. The city will also consider the potential effects of tsunami, high tides with strong winds, sea level rise and extreme weather events, including those potentially resulting from global climate change and greater surface runoff caused by increasing impervious surfaces.
C. The approximate location and extent of frequently flooded areas are shown on the following adopted critical areas map: City of Aberdeen Critical Area Map 2: Frequently Flooded Areas. This map is based on data obtained from:
1. Federal Emergency Management Agency Flood Insurance Rate Maps, July 1984, or as later revised.
D. These maps are to be used as a guide for the city, project applicants, and/or property owners and may be continuously updated as new critical areas are identified. They are a reference and do not provide a final critical area designation.