The following words, terms and phrases shall have the following meanings respectively ascribed to them:
MINE OR EXCAVATION: A. Any excavation made by the removal of the natural surface of the earth, whether sod, dirt, soil, sand, gravel, stone, or other matter, creating a depression or depressions.
B. Any area where the topsoil or overburden has been removed for the purpose of mining earthly deposits or minerals, yet the area has remained idle since the topsoil removal.
C. Any area that is being used for stockpiling, storage, and processing of sand, gravel, black dirt, clay, and other minerals.
OVERBURDEN: Those materials which lie between the surface of the earth and material deposit to be extracted.
REHABILITATION: To renew land to self-sustaining long term use which is compatible with contiguous land uses, present and future, in accordance with the standards set forth in this chapter.
TOPSOIL: That portion of the overburden which lies closest to the earth's surface and supports the growth of vegetation. (Ord. 375, sec. 1, 5-1-1989)