(a) An approved type of valve-box shall be set over every gate valve that is twelve inches or less in size.
(b) Granular material shall be furnished and placed as backfill around each valve-box. The granular material shall be composed of gravel, broken slag or stone graded from coarse to fine, all passing a two-inch screen, and free from dust, clay or load sufficient in amount to render it unusable. The granular material shall be placed in such a manner that it completely surrounds the valve-box for a minimum distance of nine inches and shall extend from the top of the box to a depth of not less than thirty inches as measured for the top of the valve-box. Valve-boxes shall be set as per manufacturer’s specifications.
(c) Special care shall be exercised in backfilling around each valve-box to prevent displacement of the box. When the backfilling operation has been completed, the box shaft shall be plumb and centered over the valve operating nut, with the top of the box at the elevation called for on the plans or as determined by the Engineer.
(d) The valve-box shall be cleaned of all stones and debris that may have lodged inside it during the construction period.
(Ord. 352. Passed 10-22-62.)