§ 14.06.110. Category I and II roads—Alternate design method.

A.

Alternate construction methods may be utilized for Category I and II roads if approved by the RSA board prior to construction based on conditions outlined in subsection C.

B.

An RSA application for an alternate design shall be filed and approved by the RSA board prior to the start of construction of a new road or upgrade of an existing road. Failure to get approval of the RSA board prior to construction shall result in the denial of the road maintenance application. If an application is denied due to the failure to apply prior to construction, the applicant may reapply after one year.

C.

Applicant shall provide the RSA board documentation that shows soil, economic, terrain, or other conditions are such that the standard typical section is not practical.

D.

Alternate design methods shall meet the minimum requirements shown on the Alternate Typical Section drawing and associated Category I & II Alternate Road Tables.

E.

A minimum of three RSA staff inspections will take place, consisting of initial, midway, and final inspections. The applicant must provide the means to conduct a proof roll test during the final inspection. The proof roll test will consist of a 12-cubic-yard end dump truck loaded to maximum legal capacity traversing the road as directed by the RSA director or designee. The minimum proof rolling is full length of the road, on both lanes. If excessive rutting, greater than three-inch-depth tracks, occurs, remedial work will be required. The RSA director or designee will designate the defective areas in a written report.

Requirements for Embankment Material

Percent Passing by Weight

Category I & II Alternate Roads Table

Sieve Designation	Type I	Type II	Type III*
4 inch	95—100	—	—
2 inch	85—100	100	100
1 inch	—	—	95—100
No. 4	30—60	30—65	40—75
No. 16	—	—	20—43
No. 200	0—6	6—10	4—10

 

*Type III relates to Category IV Gravel Roads: Typical Section

(Ord. No. 2008-05(S), § 1, 5-6-08)