The developer will be required to do all the
excavation required in the construction of the roadway and its structures
and connections, the placing and compacting of the excavation and
excavated materials to form the approximate subgrade, the refilling
of all required surfaces, the trimming and raking of all finished
slopes, all as shown on the plans or as ordered by the Village Manager
or his duly designated representative, and whatever other incidental
work as required or directed by these specifications. He shall grade
the entire length of the roadway ditches and side slopes to the required
lines, grades and contours; shall grade public highway or private
driveway intersections as directed; and shall remove spongy material
or any material which is unsatisfactory from the subgrade to depths
as directed by the Village Manager or his duly designated representative.
All material unsuitable for use in the further
construction of the roadway shall be removed from the site of the
work immediately upon being excavated. Such material shall include
sod or other vegetable matter, rubbish, quicksand, muck, soft clay,
spongy material or any other material which cannot be readily and
suitably compacted.
Embankments shall be formed of suitable material
taken from the excavation. Where embankments are to be placed on existing
pavements or side hill slopes, the original surface shall be broken
up by plowing or other means before any material is placed thereon.
Materials shall be placed in successive horizontal layers not exceeding
eight inches in thickness, and each layer shall be rolled or compacted
as hereinafter provided. The developer shall prosecute his work in
such manner that all deep fills are made first in order that they
may be afforded maximum time for settlement. Where rock excavation
is encountered, the contractor shall arrange to excavate the same
so that it may be placed at the bottom of such fills. No rock, however,
placed in fills shall project closer than six inches to the bottom
of the proposed pavement.
Wherever insufficient material is obtained from
the excavation required within the limits of the roadway to make the
necessary embankments, the necessary additional suitable material
may be obtained from borrow pits furnished by the contractor and approved
by the Village Manager or his duly designated representative, located
beyond the limits of the work. Borrow pits shall be trimmed and left
in a neat and orderly condition upon completion of the work and shall
be seeded.
The finished subgrade shall be rolled to the
satisfaction of the Village Manager or his duly designated representative
with a self-propelled three-wheel roller weighing not less than 10
tons. In places where the character of the material makes the use
of this roller impracticable, a lighter one may be used if approved
by the Village Manager or his duly designated representative. In fills
where it is impracticable to use any kind of roller, the materials
shall be compacted by other means as directed by the Village Manager
or his duly designated representative.
The subgrade shall be formed in accordance with
the width, lines and grades as established on the plans and specifications.
All soft and spongy materials shall be removed to a depth ordered
by the Village Manager or his duly designated representative and shall
be replaced by suitable material. All boulders and ledge rock shall
be excavated to a depth of at least six inches below subgrade, and
the resulting spaces shall be filled with suitable material. This
process of rolling and filling shall be continued until the subgrade
is thoroughly compacted and of the required contour. After the subgrade
is formed, it shall be protected from damage until the pavement is
placed.
Shoulders of approximately the dimensions required
by the plans shall be formed along the edges of the proposed pavement
before pavement is placed. They shall be formed of carefully selected
material from the excavation. Upon completion of the subgrade, the
shoulders shall be rolled with a three-ton roller until compact and
of the required contour.
Upon the completion of the work, all side slopes,
ditches, shoulders and other portions of the roadway shall be trimmed
to the widths and lines as established on the plans. All surfaces
shall be raked free of all loose stones, and debris shall be removed
from the site of the work. The faces of all rock cuts shall have a
fairly even uniform surface, free from all loose stone or shattered
edges or other conditions that will render them unsafe.
The developer shall maintain and keep open all
required ditches and waterways and do such pumping and bailing as
will keep all portions of the work free from the accumulation of water.