Every person making, maintaining, or using any oil well sump, and every person making, maintaining or using any other manmade excavation three feet or more in depth, and every person owning or having possession of any premises on which such excavation exists, shall either cover such excavation or erect and maintain around such excavation at all times, if an oil sump, and in other cases at all places where the slope is steeper than one foot vertical to two feet horizontal if not under water, or one foot vertical to four feet horizontal if under water, a fence not less than five feet high mounted on steel posts with not less than three strands of barbed wire mounted at a forty-five degree angle from the top of the fence. Such fence shall be constructed of chain link or other industrial type fencing of not less than nine-gauge wire and of not greater than two-inch mesh. The posts supporting such fence shall be set thirty-six inches in a concrete base and shall be spaced approximately ten feet apart. Tension wires of at least nine-gauge coil-spring wire, or equivalent, shall be stretched at the top and bottom of the fence fabric and fastened to the fabric at twenty-four-inch intervals. Gates shall be of a structure substantially the same as the required fence and shall be kept locked when not attended by an adult. There shall be no apertures below the fence large enough to permit any child to crawl under such fence.
(Prior code § 9.36.040 (Ord. 388 Art. 2, § 1, 1954))