(a) The sewers shall in all cases be covered with earth to a depth of not less than four feet or as shown on the drawings, and where the trenches do not furnish sufficient material the contractor shall supply such deficiency.
(b) If additional filling beyond four feet is required to be placed over a sewer for its protection, the contractor shall furnish and spread earth, free from animal or vegetable matter, in such a manner and in sufficient quantity so that, after it is thoroughly compacted, the embankment will be of uniform grade and cross-section and of the dimensions shown on the drawings. Such filling shall have a width extending at least two feet outside of the sewer on both sides.
(Ord. 352. Passed 10-22-62.)