No grading, filling, clearing, or excavation of any kind, excluding grading associated with an agricultural use, shall be initiated without county engineer approval of a drainage study or drainage plan (see section 8-4A-11 of this article), and as applicable, an approved hillside application (see section 8-3H-1 of this title). (Ord. 426, 9-26-2001; amd. Ord. 490, 4-9-2003; amd. Ord. 766, 12-8-2010)