Where a man-made excavation is filled with water so that the area of the surface of such water exceeds one acre and the nature of the excavation and water is such as to constitute an artificial lake, a fence or barrier is not required by this ordinance at any portion of the boundary of such excavation where:
(a) The edge of the excavation is not more than one foot above the surface, or at no place is the slope to the water greater than one foot vertical to four feet horizontal.
(b) The slope in the water is not greater than one foot vertical to four feet horizontal to a depth of five feet.
(Ord. 186; November 27, 1962)