The aim in backfilling an excavation anywhere within the street is to obtain a fill which will not settle. This backfill shall be done as follows:
(a) Permanent-Type Improvement: Concrete, Asphalt, Brick of Macadam. Backfill is to be placed in six-inch layers tamped mechanically to ninety-five percent (95%) maximum laboratory dry weight. Backfill material shall be a crushed back run gravel of a quality to give the required density. If excavated material is dry, granular and of a quality which will meet the density requirements, it may be used, but only with the express approval of the City Engineer. All wet material in the trench must be removed. Backfill shall be brought to a proper level to allow for the pavement replacement (as noted in Section 913.06
(a)). Backfill over sewers must be well tamped by hand around, under and over the pipe to a depth of one foot to afford good support and also to avoid breakage.
(b) Asphalt Double Sealed and Oiled Streets. Same as subsection (a) hereof. Excavated material may be used if dry and granular and with the express approval of the City Engineer. The top twelve inches of backfill shall be crushed bank run gravel, the surface of which is to be brought to a point two inches below the existing surface of the street (as noted in Sec 913.06
(b))
(c) Gravel of Dirt Streets. Same as subsection (b) hereof, except the surface of crushed bank run gravel is to be flush with the existing surface (as noted in Section 913.06
(c))
(d) Area Back of Curb. Same as subsection (b) hereof, except backfill shall be brought to level four inches below the surface; the remaining four inches shall be topsoil. Topsoil shall be seeded with grass seed comparable to the original surface. (as noted in Section 913.06
(c)).
(Ord. 215-1993. Passed 2-22-94.)