A. Any grading or the alteration of any watercourse regulated by this title shall be performed in a controlled manner in order to minimize the loss of soil through erosion from rainfall or storm water flow. Prior to granting a floodplain use permit for work in any floodplain, methods to control erosion and sedimentation during construction and post-construction must be demonstrated to be appropriate to the satisfaction of the chief engineer.
B. Due to the rapidly changing hydraulic characteristics of watercourses within the county, and the effects that sand and gravel mining and other excavations have on these hydraulic characteristics, floodplain use permits for grading and construction shall only be issued for a limited time period, not to exceed one year, subject to annual renewal and upon review by the chief engineer.
C. In addition to those conditions provided for elsewhere, floodplain use permits for excavations may impose conditions regarding the area and location in which excavations are allowed, the maximum amount of material to be excavated, mining mitigation plans and other reasonable restraints on the methods of operating including time restraints.
D. The chief engineer may require hydrologic, hydraulic, geomorphic, and riparian habitat analyses that address both existing and future conditions, as well as the impacts that could potentially occur during grading and construction.
(Ord. 2010-FC5 § 1 (part), 2010; Ord. 2005 FC-2 § 2 (part), 2005)