§ 66-01 Definitions.*
RCNY § 66-01
10-year rainfall flood risk area. The term “10-year rainfall flood risk area” means an area designated on a map promulgated by the department of environmental protection that represents locations in the city where there is a 10 percent chance or greater of rainfall-induced flooding in any year, incorporating the impacts of the projected 2050 sea level rise on sewer outfalls and storm drains as projected by the New York city panel on climate change, with the addition of a 50-foot wide area around the perimeter to account for the margin of uncertainty inherent in such projections. Coastal flood risk area. The term “coastal flood risk area” means an area designated on a map promulgated by the department of environmental protection that represents locations in the city where there is a 1 percent chance or greater of flooding in any year, incorporating the impacts of sea level rise as projected for the year 2080 by the New York City panel on climate change, provided that if such panel provides projections for baseline years later in time to 2080 then such baseline years may be adopted by rule for the purposes of this definition. In initially determining such area, the department, in consultation with other relevant agencies as described in Administrative Code § 24-809(b), shall consider the federal emergency management agency coastal flood mapping data that defines the current 100-year floodplain, and the best available data, as determined by the department and such agencies, including 90th percentile projections from the New York city panel on climate change and any other data determined to be reasonable, that reflects the 1 percent chance or greater of flooding in any year. (Added City Record 9/23/2025, eff. 9/23/2025)
