All perimeter markers shall clearly mark the perimeter of the permit area before and during surface mining activities. The markers shall be, at a minimum, 2 inch diameter pipes or wood posts or metal posts driven into the earth with a minimum of 3 feet exposed to mark the beginning and ending points of the permit area and any other point necessary to clearly identify the permit area. They shall be identified by painting the exposed portion red or other color as indicated in the permit application. Other marker specifications may be used if approved by the Bureau.
Md. Code Regs. 26.20.18.03