§ 15.01.1250. General description.

This division covers the requirements for bituminous surface paving on roads. All streets shall be surfaced in accordance with the following:

1.

Six-inch minimum or more (based on pavement design) crushed gravel base course over prepared subgrade.

2.

Three-inch minimum or more (based on pavement design) compacted thickness plant mix asphalt surfacing.

3.

One-inch minimum or more (based on pavement design) compacted thickness plant mix asphalt overlay, as required by the public works department.

4.

Pavements in arterial or collector roads in non-sensitive lands areas shall be a minimum of four-inch asphalt with ten-inch base course or equivalent pavement structural number as approved by city engineer. Sensitive Lands Areas shall include a minimum of ten inches sub-base course. Arterial/Collector road pavements shall be designed for the twenty-year ADT forecasts per the latest version of the City Transportation Master Plan with a minimum of five percent trucks or greater as determined by city engineer for the given roadway. Alternative pavement structure may be approved by city engineer based upon a review of detailed pavement design by a qualified, licensed geotechnical engineer.

5.

Pavements in sensitive lands ordinance areas shall be a minimum of three-inch asphalt, eight-inch base course, and twelve inches subbase course for local roads; four-inch asphalt, nine-inch base course, and thirteen-inch subbase course for collector roads; and five-inch asphalt, ten-inch base course, and sixteen-inch subbase course for arterial roads. Pavements shall be designed for the twenty-year ADT forecasts per the latest version of the City Transportation Master Plan or development traffic study where no master plan data is available with a minimum of three percent trucks or greater as determined by city engineer for the given roadway. Alternative pavement structure may be approved by city engineer based upon a review of detailed pavement design by a qualified, licensed geotechnical engineer.

6.

Existing roadways not having pavement structural number equivalent to design requirements shall be reconstructed to centerline of roadway by development abutting the roadway frontage.

(Ord. No. 2007-07-31, § 13.1, 7-10-2007; Ord. No. 2012-05-15, § 1, 5-8-2012)