(A) Flexible pavement. The flexible pavement street structural section for public streets shall be the minimum depths shown below.
Table 10-3.1 Street Structural Section (Minimum Depths)
Street Classifications | Asphalt Surface Course (A) | Asphalt Base Course (B) | ABC Fill (C) |
Parkway | 2.5 in. - A-19** | 3 in. - A-19 | 12 in.* |
Arterial | 2.5 in. - A-19** | 3 in. - A-19 | 12 in.* |
Collector | 2 in. - A-12.5** | 2.5 in. - A-19 | 8 in. |
Local Street-Residential | 2.5 in. - A-12.5** | 0 in. | 6 in. |
Local Street-Commercial and Industrial | 2 in. - A-12.5** | 2.5 in. - A-19 | 8 in. |
* See Note 1 | |||
** See Note 4 | |||
(1) Install in two equal layers.
(2) ABC fill to conform to MAG Standard Specification 702.2 (aggregate base).
(3) Asphalt concrete shall conform to the latest version of the East Valley Asphalt Criteria and be approved by the EVA Committee.
(4) Surface treatment for new roadways shall be placed at the end of the 1-year warranty period. Surface treatment shall be Grade SS-1h fog seal in accordance with MAG Standard Specification 333 applied at a rate of 0.1 gallon per square yard or as otherwise directed by the city engineer.
(5) Utility adjustments and concrete collars shall be completed prior to application of surface treatment.
(6) A soil test and a street structural section recommendation by a qualified geotechnical firm shall be required unless the city engineer allows an exemption.
(B) Rigid pavement. Rigid pavements, such as portland cement concrete, are generally not used for city streets. If rigid pavements are used, each design must be approved by the city engineer.
(C) Decorative pavement.
(1) The use of decorative concrete must be approved by the city engineer. Decorative concrete will not be placed in arterial through lanes. When approved, it shall be constructed in accordance with MAG Standard Specifications Sections 340 and 725 (Class A concrete) with a minimum thickness of 8 inches.
(2) The use of interlocking paving blocks must be approved by the city engineer. When approved, they shall be installed in accordance with the manufacturer’s guidelines. In addition, a minimum of 25 paving blocks of the type installed must be deposited free of charge at the city’s maintenance yard for future city maintenance operations.
(D) Miscellaneous pavement standards.
(1) For cases where the full depth of base course cannot be constructed due to insufficient cover over existing facilities, the city engineer reserves the authority to approve equivalent alternate designs if justified.
(2) The minimum pavement cross-sectional requirement for temporary turnarounds, which are constructed at project phase lines, is 6 inches of aggregate base course over 6 inches of subgrade; see MAG Standard Specifications Sections 301, 310 and 702. If the temporary turnaround is constructed at a project boundary, a surface course of 2 inches of asphaltic concrete is required in addition to the base and subgrade noted above; see MAG Standard Specifications Sections 321 and 710, without lime.
(3) Temporary pavement cross-sections shall consist of 2 inches of asphaltic concrete over 6 inches of aggregate base course over 6 inches of subgrade, see the same MAG Standard Specifications sections noted above.
(4) The edge of the temporary pavement and the perimeter of a paved temporary turnaround shall be constructed with a thickened edge per MAG Standard Detail 201, Type “B.”
(Ord. passed - - )