Dan:
My project invloves wetlands so a permit from the MDEQ (State) is required under Part 303. My area of ground disturbance exceeds one acre so a Soil Erosion and Sedimentation Control Permit is required from the County. My township also requires a Class B Earth Change permit.
Other permits may be required by the State, for instance, if the created water body exceeds 5-acres or is within 500-feet of a lake or stream (Part 301) or the disturbance is located within a floodplain (Part 31). There are too many less common permit types to list but they may include dams, critical dunes, designated environmental areas, and much more. Here is a link to the State's website for more information.
State of Michigan Permit Information
