Memphis requires grading and drainage plans for development projects under the Stormwater Management Manual 3.0 and the Unified Development Code. Site grading must direct runoff away from neighboring properties and toward approved stormwater facilities. Projects disturbing one or more acres need a land disturbance permit with a grading plan showing existing and proposed contours. Fill material must be properly compacted and erosion controls maintained throughout grading operations.
Memphis regulates grading and drainage through building and engineering codes. Grading permits required for excavation or fill over specified thresholds, typically 50 to 100 cubic yards. Site grading must direct drainage away from structures and not adversely affect neighboring properties. Drainage swales, French drains, and catch basins may be required. Retaining walls over 4 feet need engineering and separate permits. Compaction testing required for structural fill. Final grade must match approved plans. Property owners responsible for maintaining drainage facilities on their land.
Unpermitted grading: stop-work order and fines $250 to $2,500. Redirecting drainage to neighbors: corrective action required. Slope failure from improper grading: liability and remediation costs.
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