5 rules for unincorporated Clay County, Missouri.
Verified from official government sources
Land disturbance of one acre or more in Missouri needs a state construction stormwater permit from the Department of Natural Resources before work starts. Unincorporated Clay County adds local stormwater plan review through its Land Development Code.
Missouri DNR, Construction Land Disturbance Permits
Land disturbance permits are required for construction disturbance activities of one or more acres or construction activities that disturb less than one acre when part of a larger common plan of development or sale that will disturb a cumulative total of one or more acres over the life of the project.
Missouri ties erosion control to its construction stormwater program. A site disturbing one acre or more must keep sediment on-site under a stormwater pollution prevention plan, enforced by the Department of Natural Resources.
Missouri DNR, Construction Land Disturbance Permits
The main requirement of a land disturbance permit is developing a stormwater pollution prevention plan (SWPPP) that includes site-specific best management practices (BMPs) to minimize soil exposure, soil erosion and pollutant discharge.
Missouri is landlocked, so no coastal law applies. But building near the Missouri River, Little Platte River, or on the Smithville Lake shoreline triggers floodplain rules and federal Army Corps of Engineers permits.
Clay County enforces FEMA floodplain standards in unincorporated areas through its Land Development Code. A floodplain development permit is required before building or filling in a mapped special flood hazard area.
Missouri has no statewide grading permit. Earthwork disturbing one acre or more triggers a state land disturbance permit, and unincorporated Clay County reviews grading and drainage under its Land Development Code.
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