The requirements for bedding, haunching and initial backfilling shall be in accordance with the following.
(A) Bedding. A minimum layer of six-inch bedding consisting of 000T #8 granular bedding material shall be provided upon a stable undisturbed subgrade. If an unstable subgrade is encountered, the Village Administrator or his or her duly authorized representative shall determine the method of building required subgrade support.
(B) Haunching. After the pipe has been placed on the approved bedding material, 000T #8 granular material shall be placed around the sides of the pipe from the undisturbed trench wall to the pipe. Under no circumstances shall the maximum allowable trench width for the type, size and depth of pipe be exceeded. Unless otherwise approved or ordered, the maximum allowable trench widths measured at the top of the pipe shall be 27 inches for six- and eight-inch diameter pipe, 30 inches for ten-inch diameter pipe, 33 inches for 12-inch diameter pipe.
(C) Initial backfill. No backfill shall be placed until after inspection is completed by the Public Services Supervisor or his or her duly authorized representative. After the haunching of the pipe has been completed, the pipe shall be covered with 000T #8 granular material to a plane, six-inches above the top of the pipe.
(D) Backfill. Upon completion of the initial backfill, the best excavated material shall be used for backfilling the trench. Trash, boulders, frozen soil and the like shall not be used as backfill material. If the pipe is laid under a pavement or berm area, the pipe shall be backfilled with approved granular material, a minimum of six-feet beyond the edge of the berm or edge of pavement in absence of a berm.
(Ord. 78-4, passed 2-13-1978; Ord. 92-20, passed 9-28-1992) Penalty, see § 51.999