(A) Within any SG district the excavation, hauling, mining, stockpiling or processing of sand and gravel deposits and buildings and equipment as are customarily incidental thereto, including concrete and asphalt plants, may be approved by the City Council through the issuance of a sand and gravel conditional use permit. Conditions regarding operations and reclamation/rehabilitation may be attached to the conditional use permit for the sand and gravel operation in order to assure compatibility with present and future land uses. For purposes of enforcement, conditions attached to the permit shall be considered a portion of the city code.
(B) Within a sand and gravel district, any centralized processing washing or crushing plant for materials such as sand and gravel, concrete, asphalt or others shall be allowed only as a portion of a conditional use permit. The plant shall be located in a permanent centralized location within the excavation site. Except where the applicant can demonstrate that the plant can meet state and federal air and noise standards at the project property lines, the City Council may require the processing plant to be enclosed within a building with walls from floor to roof, except for materials entries/exits and doorways, and a sealed roof, except for steam and heat exchangers, in order to meet air particulate and noise pollution standards.
(C) Portable, pit face crushing equipment may be approved as a portion a conditional use permit provided:
(1) The location of the portable crushing equipment meets all mining and/or excavation setbacks for the area in which it is to be located;
(2) The top of the portable crushing equipment and all conveyor systems are placed a minimum of 15 feet below the existing grade of the non-excavated pit edge or constructed berm projected within the permanent setback from the property lines; and
(3) Expansion of previously non-permitted, existing uses if compatible with sand and gravel operations.
(‘81 Code, § A1-48) (Ord. 291, passed 4-21-83; Am. Ord. 472, passed 1-25-90)