Except as otherwise provided in this chapter, it shall be unlawful for anyone to operate a mine or excavate without having first obtained a written permit from the city authorizing the same in accordance with this chapter. Mining and excavation operations that predate this chapter that do not have a permit shall obtain a permit within six (6) months after the adoption of this chapter. Current permit holders shall come into compliance with the terms of this chapter no later than the time their annual permit is renewed. (Ord. 375, sec. 1, 5-1-1989)