Pascagoula, MS Environmental Rules: Grading & Drainage (2026)

Jackson County regulates grading and drainage through building and engineering codes requiring permits for excavation or fill exceeding 50 cubic yards or land disturbance over 5,000 square feet. Grading plans must show existing and proposed contours, drainage patterns, and erosion controls. Mississippi common law (Beckman v. Hustler, MS Supreme Court) prohibits property owners from redirecting surface water onto neighboring properties in a manner that causes damage; natural drainage patterns should be maintained. Drainage swales, French drains, and catch basins may be required to manage the 60+ inches of annual Gulf Coast rainfall. Retaining walls over 4 feet require engineered design and separate building permits under the Mississippi Building Code. Structural fill requires compaction testing. Final grade must match approved plans. Filling in drainage channels, ditches, or jurisdictional wetlands without MDEQ and Army Corps permits is strictly prohibited. Post-construction drainage facilities are property owner's responsibility.