The developer shall establish and clearly mark
on site the limits of highway right-of-way and easements, the center
line and grades of the road pavement and the location and elevation
of drainage and drainage structures in accordance with the approved
plans. Such markers shall be maintained at the developer's expense
until the construction of all required improvements within the right-of-way
limits have been completed, inspected and approved by the Town Superintendent
of Highways.
A.
The developer shall complete the shaping of the highway
right-of-way, streams and ditches and easement areas to the line and
grade as shown on the approved plans and as otherwise may be directed
by the Town Superintendent of Highways. All unsuitable or unstable
material shall be completely excavated and removed from the right-of-way,
and all rock or boulders larger than six inches in diameter shall
be excavated at least eight inches below the finished subgrade of
road pavement, drainage or drainage structures, curbs and sidewalks.
B.
Where fills are necessary to complete the required
line and grade or to backfill trenches or other excavations, the materials
incorporated in the work shall be acceptable to the Town Superintendent
of Highways and shall be placed in layers not exceeding eight inches
in depth, each layer to be thoroughly compacted by rolling with a
three-wheel, sheep's-foot, pneumatic-tired or padded-wheel roller
or by impact rammer or vibrator equipment in areas inaccessible to
power rollers.
C.
All compacting shall continue until the fills are
firm and unyielding. Special care shall be exercised immediately adjacent
to pipes in order to avoid damage to the pipe and to prevent pipe
misalignment.
D.
The areas between the road shoulder or curbing and
right-of-way line must be graded and seeded in order to prevent erosion.
E.
The rough grade of the road pavement, curb and sidewalk
areas shall be completed within one inch above or below finished subgrade
as shown on the approved cross section of the right-of-way improvement.
F.
Earth shoulders and flow lines of ditches and gutters
shall be maintained in satisfactory condition at the developer's expense
at all times during the course of construction of the subdivision
and until such time as the Town Board has accepted dedication of the
right-of-way.
A.
The width of the trench in which the pipe is placed
shall be sufficient to permit thorough tamping of the backfill under
the haunches and around the pipe. Where rock in either boulder or
ledge formation is encountered, it shall be removed to below grade
and replaced with suitable materials in such a manner as to provide
an earth cushion having a thickness under the pipe of not less than
eight inches; and where there are excessively heavy fills over the
top of the pipe, the Town Superintendent of Highways may specify that
a sand cushion up to 1/2 inch in thickness per foot of fill be placed
over the top of the pipe. In no case shall the top of any drainage
pipe be less than 18 inches below the finished grade of the pavement.
Where soft, spongy or other unstable soil is encountered at the grade
established, all such unstable soil under the pipe and for a width
of one diameter on each side of the pipe shall be removed and replaced
with run-of-bank (ROB) gravel or other acceptable material. In all
cases the bed shall be thoroughly compacted and shall provide a firm
foundation for the pipe.
B.
Pipe shall be laid to a true line and grade on the
prepared bed of the trench. Pipelaying shall begin at the downstream
end and progress upstream.
C.
Backfilling of trenches shall be done in accordance with the subsection on fills under the above heading of § 152-12, Excavation, filling and rough grade.
D.
Any additional drainage facilities not shown on the
approved plans and which may be ordered by the Town Superintendent
of Highways shall be constructed by the developer at the developer's
expense in accordance with these specifications and included on the
as-built drawings.
A.
It is the intent of this specification that all disturbed
areas within the right-of-way due to highway construction and placement
of utilities shall be restored to conditions acceptable to the Town.
B.
The removal of all equipment and parts, junk, rubbish,
excess material, debris of all kinds and trees damaged beyond repair
shall be included in the restoration work.
C.
All unpaved areas within the rights-of-way and newly
created or stripped earth slopes shall be seeded in accordance with
Section 610-3.02 of the current Standard Specifications of the New
York State Department of Transportation.
D.
In order to control soil erosion, sodding shall be
placed on areas designated by the Town Superintendent of Highways
in accordance with Section 612-3.01 of the current Standard Specifications
of the New York State Department of Transportation.
A.
Highways shall be so designed that finished tangent
grades will not be less than 1.0% nor more than 8.0%.
B.
Every change in grade shall be effected with a vertical
curve of sufficient length to ensure adequate stopping sight distance
and to provide for smooth transition. These vertical curves shall
be designed in accordance with the graph shown on Figures 4 and 4A
of these specifications.[1]
[1]
Editor's Note: The figures are included at
the end of this chapter.
