Mineral excavation and processing operations, as well as related structures and buildings, shall be set back in accordance with SCC 30.23.110(27). (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003; Amended by Amended Ord. 05-083, Dec. 21, 2005, Eff date Feb. 1, 2006; Amended by Amended Ord. 17-004, May 10, 2017, Eff date June 1, 2017; Amended by Amended Ord. 21-060, Oct. 6, 2021, Eff date Oct. 22, 2021. Formerly 30.31D.120).