Unless the site is eligible under Ch. 162 of this code of ordinances for heavy industry (which shall require any additional permits for this activity within the zoning district the mine is located), processing at the mine site shall be limited to the following:
(A) Scalping, the first cut of the incoming material including removing the largest size particles, cleaning the incoming material from foreign body contamination such as twigs, trash, glass or other unwanted oversize material;
(B) Separation of product into different rock sizes, gravel and general sand category;
(C) No fine screening for separation of sand into different classifications (for hardness/shape) shall be permitted;
(D) Use of water for washing shall be limited to 250,000 gallons per day (g.p.d.);
(E) Crushing for new or expanded operations shall be limited to 150,000 tons per year;
(F) No use of chemicals in the processing, cleaning or separating of aggregate materials is allowed; and
(G) Any processing of minerals shall not be conducted closer than 100 feet to the property line, nor closer than 500 feet, to any residential or commercial structures located prior to commencement of processing operations without the written consent of all owners and residents of the structures for any new or expanded operation.
(1) The city may impose greater setbacks as a condition of the mining or interim use permit when there is a finding that this is required to protect adjoining property from negative impact and in order to protect health, safety or welfare of the general public.
(Prior Code, § 345.06)