Section R. 425.46 - Borrow pitsRule 46.
(1) The banks of borrow pits in the mining area used for dike or other construction, and located outside the tailings basin, shall be sloped at an angle which will minimize erosion and promote vegetation.(2) Where substantial natural vegetation is not expected within 5 years, or where erosion is occurring, or the supervisor finds it likely to occur, which results or may result in injury or damage to fish and wildlife or the pollution of air or water, the pit shall be planted with a vegetative cover appropriate to a future use of the land and to prevent erosion.Mich. Admin. Code R. 425.46