Floodplain Development Permit Requirements ![]() Regulated floodplains provide many benefits to a community, including preserving greenspace, providing recreational opportunities, reducing the number and severity of floods, and helping handle stormwater runoff.įlood hazard areas also help maintain and enhance water quality (natural vegetation filters out impurities from runoff and uses excess nutrients), create excellent habitats for plant, fish and wildlife, and even help protect areas for rare and endangered species. 02 percent chance elevation (500-year flood). Johns Creek lies within the Upper Chattahoochee Watershed and the Chattahoochee River, Autry Mill Creek, Big Creek, Cauley Creek, and Johns Creek are all sources of possible flooding in this watershed.įor example, in late 2009, the Chattahoochee rose to its highest levels since Buford Dam was built in 1956, with some areas over the 1 percent annual chance elevation (100-year flood), and other areas even exceeding the. However, that "100-year flood" could actually occur more than once in a relatively short period of time, not necessarily just once every 100 years. In Johns Creek's Special Flood Hazard Area, commonly referred to as the "100-year floodplain," flood elevations have a one percent chance of being equaled or exceeded each year. ![]() To see if your property falls into a floodplain, check the Johns Creek Flood Insurance Risk Zone Map or the Georgia DFirm site call 67 with any floodplain-related questions. ![]() Approximately six percent of Johns Creek is located within a regulated floodplain, otherwise known as a Special Flood Hazard Area.įloodplain regulations and development restrictions can greatly reduce future flooding impacts, preserve greenspace and habitat, control floodwaters, and protect water quality. The City of Johns Creek is helping minimize potential flooding by addressing the impact of new development and redevelopment on stormwater, and regulating development in floodplains based on projected land-use conditions.Ī floodplain is a nearly flat plain along the course of a stream or river that is naturally subject to flooding.
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