Projects that will disturb more than 5 acres of land the sponsor airport must apply for a Notice of Coverage (NOC) from the Michigan Department of Environmental Quality (MDEQ). There is a $400 fee for this permit. The sponsor must have their Soil Erosion Sedimentation Control (SESC) permit from the county/city before they can get an NOC from MDEQ.
Projects that disturb between 1 and 5 acres of land are statutorily subject to the NOC requirements, but there is not an application requirement. Sponsors have implied NOC authorization whem they receive the SESC permit. However, sponsors still have to comly with all NOC requirements (weekly inspections and inspections after a rain event by a certified operator).
Projects that disturb less than 1 acre do not need a NOC. These projets are only subject to the SESC requirements.