A.
After completion of the rough grade in accordance with § 152-12 and prior to laying of the foundation course, the subgrade shall be shaped to line and grade and thoroughly compacted with an approved self-propelled roller weighing not less than 10 tons. All hollows and depressions which develop during rolling shall be filled with acceptable granular material and again rolled. This process shall continue until no hollows or depressions develop. The subgrade shall not be muddy or otherwise unsatisfactory when the foundation course is laid upon it.
B.
Any soft or unstable portions of the subgrade which
develop under the roller shall be completely excavated and removed
from the right-of-way and shall be replaced with acceptable granular
material and the area regraded and compacted as above.
A.
Before fine grading of subbase material or construction
of curbs and sidewalks is started, all storm and sanitary sewers and
all utilities, including house connections and hydrants, shall have
been installed, and all fill and backfill shall have been thoroughly
compacted to the satisfaction of the Town Superintendent of Highways.
B.
Fine grade shall conform to the prescribed width of
pavement and shall conform to the typical cross section of the road
pavement and to the approved line and grade.
A.
After the fine grade and all curbs have been constructed
to the satisfaction of the Town Superintendent of Highways, the developer
shall furnish and place a foundation course of approved crusher run
stone or crusher run gravel to the depth as called for in these specifications.
All materials acceptable for these courses shall be hard, durable
and sound and shall be well-graded from coarse to fine. One hundred
percent by weight of the particles shall be of such a size as will
pass through a two-inch square hole, 25% to 60% by weight shall be
1/4 inch, and 5% to 40% by weight shall pass through the No. 40 mesh
sieve and 0% to 10% by weight shall pass through the No. 200 mesh
sieve.
B.
The materials shall be placed on the finished subgrade
in six-inch layers and shall be thoroughly compacted by rolling with
a self propelled ten-ton roller. Water shall be added to the material
in such amounts as the Town Highway Superintendent may consider necessary
for proper compaction. After compaction, the surface shall be true
to grade and cross section, and any depressions shall be eliminated
by the use of additional granular material thoroughly compacted so
that it will not weave under the roller, and the total depth after
compaction shall not be less than 12 inches.
