Fine material, free from lumps and stone, selected from the soil shall be thoroughly
compacted around and under the excavation substructure to the upper level of such
substructure. Above the upper level of the substructure, backfill material shall be
placed to the subgrade of the pavement in lifts consistent with the type of soil involved
and the degree of consolidation specified by the city-parish consolidated council.
Broken pavement, large stones, roots and other debris shall not be used in the backfill.
The number and size of each lift shall be dependent upon the type of soil involved.
Such backfill shall be done in a manner that will permit the restoration of the surface
to a density condition not less than that existing prior to excavation unless otherwise
specified. The public works department may require soil tests to be furnished by a
recognized soil testing laboratory or registered professional engineer specializing
in soil mechanics when, in its opinion, backfill for any excavation is not being adequately
compacted. In order for the resurfacing to be permitted, such tests must show that
the backfill material meets the minimum requirements as prescribed by the city-parish
consolidated council. All expenses of such tests shall be borne by the permittee.
(Parish Code 1977, § 20-23)
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