Amends GS 113A-103, which includes definitions for the Coastal Area Management Act by defining man-made ditches as constructed, altered, or excavated features used to convey water, including but not limited to artificial ponds, culverts, canals, swales, storm channels, minor-drainage features, and roadside ditches. Amends GS 130A-113 by prohibiting the Coastal Area Management Commission from designating man-made ditches as areas of environmental concern. Makes conforming changes to GS 113A-113, and GS 113A-113. Amends the definition of marshland as it is used in the statute (permits to dredge or fill in or about estuarine waters or state‑owned lakes) to exclude any areas contained within a man-made ditch.