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No person shall do or commit or cause to be done or committed, any of the following described acts without first obtaining a grading permit pursuant to Chapter 2 of this Division:
(a) Impair, impede or accelerate the flow of water in a watercourse;
(b) Alter the surface of land, by construction, excavation, embankment or otherwise, so as to reduce the capacity of a watercourse;
(c) Construct, alter or remove any flood control or storm water drainage structure, facility or channel of or in a watercourse;
(d) Construct or place any structure in, upon or across a watercourse; or
(e) Place fill or encroachments that would increase the flood level or impair the ability of a floodway to carry and discharge the waters resulting from the 100-year flood, within a "floodway" as shown on San Diego County Flood Plan Maps adopted by the Board of Supervisors and on file at the Department of Public Works, as shown on a "Flood Insurance Rate Map" adopted by the Federal Emergency Management Agency, or as defined in Section 87.803(20) of this Division. Permits may be issued where the effect of the fill or encroachment on flood heights is fully offset by stream improvements.
(Added by Ord. No. 9547 (N.S.), effective 5-9-03; amended by Ord. No. 9634 (N.S.), effective 4-23-04)