Chapter 9.170 — M-R-A ZONE (MINERAL RESOURCES AND RELATED MANUFACTURING)

CHAPTER 9.170. - M-R-A ZONE (MINERAL RESOURCES AND RELATED MANUFACTURING)

Sec. 9.170.010. - Scope.

The provisions of this chapter shall apply in all M-R-A Zones.

Sec. 9.170.020. - Uses permitted.

A.

Uses permitted Notwithstanding the requirements of Section 9.170.030, the following uses are permitted on parcels not less than twenty thousand (20,000) square feet in area:

(1)

Agricultural use of the soils for crops, orchards, grazing and forage.

(2)

Farmworker housing.

(3)

Electric and gas distribution, transmission substations, telephone and microwave stations.

(4)

Water well and any use appurtenant to the storage and distribution or water.

(5)

Riding and hiking trails, recreation lakes, and camp grounds.

B.

Surface mining operations. The following uses are permitted in conformance with the development and performance standards of this chapter, provided that the operator thereof holds a permit to conduct surface mining operations, issued pursuant to Chapter 5.65, which has not been revoked or suspended:

(1)

Mining, quarrying, excavating, beneficiating, concentrating, processing, and stockpiling of rock, sand, gravel, decomposed granite, clay, gypsum, limestone, metallic ores, and similar materials, and the rehabilitation of the resulting excavations.

(2)

Rock crushing plants, aggregate washing, screening and drying facilities and equipment, and concrete batching plants.

(3)

Ore reduction plants, and specialty plants for processing mineral products; and the manufacture of block, pipe, tile, bricks, cement, plaster, and asphaltic concrete, provided that such plants and manufacturing operations observe a minimum setback of three hundred (300) feet from any zone, other than the M-R, M- R-A, C2 and C4 Zones.

The uses and structures permitted in this subsection and any accessory use established as a part thereof shall assume a nonconforming status pursuant to the provisions of Section 9.240.080 on the date that the mineral resource on the site of such use or structure is depleted.

C.

Accessory uses permitted. Premises in the M-R-A Zone may be used for accessory uses provided such uses are established on the same parcel of land, are incidental to, and do not substantially alter the character of any permitted use, including, but not limited to:

(1)

Retail and wholesale distribution of materials produced on the site.

(2)

Storage of trucks and excavating vehicles.

(3)

Storage of materials and machinery used in the operation.

(4)

Scales and weighing equipment.

(5)

Offices and maintenance shop structures, including use of mobilehomes.

(6)

Residences and mobilehomes for caretakers or watchmen and their families provided no compensation is received for the use of any such residence, mobilehome or mobilehome space.

(7)

Sign, on-site advertising.

D.

Conditional uses. The following uses are permitted provided a conditional use permit has been granted pursuant to Section 9.240.280: Sewage sludge/organic waste composting facilities.

(Ord. No. 2023-08, § 30, 5-18-2023)

Sec. 9.170.030. - Development standards.

Premises in the M-R-A Zone shall be subject to the following development standards.

(1)

Lot area. Not less than five (5) acres gross.

(2)

Lot width. Not less than two hundred (200) feet.

(3)

Yards. Front, rear, and side, not less than fifty (50) feet for any use permitted except those uses permitted in Section 9.170.020(A); provided further, however, that any structure exceeding fifty (50) feet in height shall have front, side, and rear yard spaces equal to the height of said structure.

(4)

Structure height. No building or structure shall exceed fifty (50) feet in height, unless a greater height is approved pursuant to Section 9.240.370. In no event, however, shall a building exceed seventy-five (75) feet in height or any other structure exceed one hundred and five (105) feet in height, unless a variance is approved pursuant to Section 9.240.270.

(5)

Off-street parking. Off-street parking shall be provided and improved as required in Section 9.240.120.

Sec. 9.170.040. - Special development and performance standards.

Premises in the M-R-A Zone used for any mining and quarry operations, and related manufacturing shall be subject to the following standards:

(1)

Noise suppression. All equipment and premises employed in conjunction with any of the uses permitted in the M-R-A Zone shall be constructed, operated and maintained so as to suppress noise and vibrations which are or may be injurious to persons living on adjoining property.

(2)

Roads and driveways. All roads and driveways shall be kept wetted while being used or shall be treated with oil, asphaltic concrete or concrete, or other palliative to prevent the emission of dust.

(3)

Access roads. All private access roads leading off any paved public street onto property used for any purpose permitted in Section 9.170.020(B) or (C) shall be paved to a minimum width of twenty-four (24) feet with asphaltic concrete or equal, not less than three (3) inches in thickness with adequate compacted base material for not less than the first one hundred (100) feet of said access road.

(4)

Air and water pollution. All operations shall be conducted in compliance with the requirements of the Riverside County Air Pollution Control District and the State Water Quality Control Board.

(5)

Slopes of excavations. No production from an open pit quarry shall be permitted which creates an average slope steeper than one (1) foot horizontal to one (1) foot vertical; provided, however, that a steeper slope may be permitted where the soil content or material is such that a vertical-cut excavation is safe in the opinion of the Division of Industrial Safety, Department of Industrial Relations of the State of California.

(6)

Landscaping and fencing. Excavation operations which are located at any time within 500 feet of at least ten (10) buildings or mobilehomes used or designed for dwelling purposes shall be screened to a height of at least six (6) feet by either landscaping, berms, walls or solid fencing and the outer boundaries of the area being excavated shall be enclosed with a six (6) foot high chain link fence, including all necessary gates, except where such a fence would be impracticable as in the bed or flood channel of a wash or watercourse.

(7)

Hours of operation. All uses shall confine operations on the property, other than maintenance, to the hours between six (6:00) a.m. and ten (10:00) p.m. of any day, except those operations that are located not less than three hundred (300) feet from the outer boundary of such property.

(8)

Insurance. Before commencing operation in any quarry, the owner or operator shall show continuing evidence of insurance against liability in tort in the amount of three hundred million ($300,000) arising from the production activities, or operations incident thereto, conducted or carried on under or by virtue of any law or ordinance. Such insurance shall be kept in full force and effect during the period of such operations.

(9)

Ponding. Where practicable, all excavation operations shall be conducted in such a manner as to prevent unnecessary ponding or accumulation of storm or drainage water.

(10)

Rehabilitation. All property partially or totally depleted of its mineral resources as a result of a use permitted by this chapter shall be rehabilitated in accordance with the mining reclamation plan which has been approved pursuant to the provisions of Chapter 5.65.