(A) Requirements. For the purpose of this section, asphalt concrete, aggregate base material, prime coat, tack coat, and seal coat shall meet all current material specification standards, and design standards of the city for public road construction or receive the approval of the City Engineer/Public Works Director.
(B) Subgrade compaction. Compaction of subgrade materials shall be in accordance with the requirements of § 7.90.190 (Fills).
(C) Soil sterilization. Unless otherwise approved by the City Engineer/Public Works Director, subgrade earth materials shall be sterilized to preclude plant growth.
(D) Pavement structural section. The soils engineer or the civil engineer shall determine the pavement structural section(s) for private parking areas, access lanes, driveways and private streets. The structural section(s) shall be based on:
(1) Soils tests of the subgrade soil(s) performed in accordance with the latest revision of California Test Method Number 302 and anticipated traffic and/or loading conditions.
(2) The design shall be determined by R-value testing in accordance with Caltrans Testing Methods with recommended safety factors.
(E) Alternative design method. In lieu of the recommended structural section from the soil engineer or the civil engineer, the following standards may be used for private parking areas, access lanes, driveways, and private streets:
INDUSTRIAL AND COMMERCIAL DEVELOPMENTS | MINIMUM STRUCTURAL SECTION |
Parking areas | .25' AC/.33' AB |
Driveways and perimeter drives for industrial development | .25' AC/.83' AB |
Driveways and perimeter drives for commercial development | .33' AC/.65' AB |
INDUSTRIAL AND COMMERCIAL DEVELOPMENTS | MINIMUM STRUCTURAL SECTION |
HIGH DENSITY RESIDENTIAL | |
Parking areas and access lanes | .25' AC/.33' AB |
Drives and areas subject to heavy truck use | .33' AC/.67' AB |
PRIVATE STREETS | |
Structural roadway section for private streets | .33' AC/.50' AB |
Notes: 1. AC means asphalt concrete pavement. AB means class II aggregate base material. | |
(F) Dedicated streets. Minimum structural sections for dedicated city streets shall conform with current city standards and design guidelines.
(G) Exceptions. The provisions of this section shall not apply to private asphalt concrete driveway(s) providing access to not more than two single-family residences, proposed in conjunction with a project for which a grading permit has been issued or to commercial, industrial or high-density residential developments where all pavement areas are constructed of Portland cement concrete pavement.
(Ord. 2022-364, passed 11-16-2022)