(1) Identified natural drainage channels that are secondary to the river channel(s) in discharging floodwaters downstream during flood periods shall be preserved or maintained as open space.

(2) All structures and development shall be oriented parallel to known floodwater flow directions in order to minimize flow obstruction. Determination of such orientation shall be based upon topographical and historical flood data. When such information is not available, orientation shall be in an upstream-downstream direction, parallel with the adjacent river channel except that such orientation shall not be required for utility transmission lines permitted by SCC 30.65.280(6), and roads permitted by SCC 30.65.280(13).

(3) All new construction and substantial improvements shall comply with the flood hazard protection standards of SCC 30.65.120. (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003).