A minimum setback of 30 feet from top of bank shall be provided for any buildings, mobile homes, garages, swimming pools, storage tanks, parking spaces, driveways, decks more than 30 inches above natural grade, retaining walls, or other similar structures for property adjacent to Zimpher Creek, Calder Creek, or Atascadero Creek. Any grading within the creek setback area shall be subject to the review and approval of the City Engineering Director, who shall review the application in regards to its potential effects on the waterway and native plants. Where the top of bank is not defined, the Engineering Director shall determine the appropriate setback area. Bridges and utilities may cross through, over, or under a waterway setback area, provided permits are obtained from relevant State and Federal agencies, and the project has received all necessary City approvals. Storm drainage, erosion control, and creek bank stability improvements that have been approved as required by law by the governmental agencies having jurisdiction over them shall not be subject to this section. (Ord. 1111, 2018)