Clearing or grading one acre or more in unincorporated Mobile County makes the site a regulated NPDES construction site under ADEM Chapter 335-6-12. The operator must register and install erosion and sediment controls before disturbing the ground.
Erosion control is driven by ADEM's construction stormwater program, Alabama Administrative Code Chapter 335-6-12. A site disturbing one acre or more, or a smaller lot that is part of a larger common plan of development totaling an acre, is an NPDES construction site that must register and follow a Construction Best Management Practices Plan. Silt fences, sediment basins, stabilized entrances, and inlet protection are standard temporary controls kept in place until the disturbed area is permanently stabilized. On Mobile County's sandy coastal soils, sediment leaving a site can smother marsh grass and shellfish beds, so ADEM treats sediment as a pollutant.
Failing to register a one-acre site or letting sediment leave the property draws ADEM enforcement, daily civil penalties, and stop-work orders. Structural controls must be designed by a registered professional engineer.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Mobile County, AL
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See how Mobile County's erosion control rules stack up against other locations.
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