What are the basic construction requirements in a 100+1 floodplain?
Creeks in the minor system that drain less than one square mile and are referred to as 100+1 creeks and are subject to floodplain regulations contained in the local ordinances. According to local ordinances, the building pad in these areas must be at least one foot* above the 100 year flood elevation or shown by survey, to be outside the 100+1 Floodplain Line (also called the Building Restriction Flood Line). If the building is located within the 100+1 Floodplain an Elevation Data Sheet or physical survey must be used to show the following elevation information: 100+1 Elevation, Finished Floor Elevation, Elevation of Lowest Mechanical Equipment, Lowest Adjacent Grade and Lowest Elevation on Lot. *Matthews and Cornelius require more than one foot above the Future 100-Year Floodplain Elevation and the 100-Year Elevation on the smaller creeks.
