§ 14.06.130. Category IV roads—Engineering required.

A.

Category IV roads are required to be designed and engineered by a licensed civil engineer. Drawings of the detailed plans must be submitted and approved by the RSA board prior to construction. Design shall meet the minimum standards as designated in the Category IV Gravel Road Typical Section drawing as indicated in the Category IV Road Table.

B.

The project engineer must provide a certified as-built drawing or a detailed report certifying that the road has been constructed to RSA standards before certification for road maintenance will be granted. This report must include photos, sieve analysis of materials used, field inspection reports, compaction test results, and other inclusions the RSA may request.

Requirements for Embankment Material

Percent Passing by Weight

Category IV 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

 

*Materials furnished by the contractor for use as Type III classified fill and/or backfill shall be crushed aggregate material with at least 50 percent of the coarse aggregate having at least one fresh mechanically fractured face and graded within the limits of Category IV Road Table.

(Ord. No. 2008-05(S), § 1, 5-6-08)