Sec. 13-30. - Road and driveway surfaces.

All roads and driveways shall have all-weather driving surfaces. All structural sections shall be constructed so as to support a minimum of seventy-five thousand (75,000) pounds or exceed the following standards:

(a)

On level areas and grades of less than five percent (5%), roads and driveways shall have a gravel surface. The structural section of the road or driveway shall be at least one foot (1') of compacted Class 2 Aggregate Base.

(b)

On grades of between five percent (5%) and ten percent (10%), roads and driveways shall have a double seal coat surface. The structural section of the road or driveway shall have an armor coat surface, constructed according to CalTrans Standard Specifications Section 37 Bituminous Seal Double Application, and the base portion of the road or driveway shall be at least one foot (1') of compacted Class 2 Aggregate Base.

(c)

On grades of greater than ten percent (10%), roads and driveways shall have an asphalt concrete surface. The structural section of the road or driveway shall be asphalt concrete of at least two-tenths of a foot (0.2') thick. The base portion of the structural section shall be at least five tenths of a foot (0.5') of compacted Class 2 Aggregate Base.

(d)

In lieu of the prescriptive structural sections required by subsections (a), (b) and (c), a design of the section may be prepared by a licensed civil engineer using a soils investigation that provides soil R-value and expansion index. Alternatively, the engineer may use an R-value of 5 and waive the soil report unless a soil engineering report is required because of specific site conditions. The traffic index to be used for the design shall not be less than 3.5.

(Ord. No. 6318, § I, 8-11-2020)

State Law reference— California Code of Regulations, Title 14 Natural Resources Code, Division 1.5, Chapter 7, Subchapter 2, Article 1-5, SRA Fire Safe Regulations, 1273.02.