[HISTORY: Adopted by the Town Board of the Town of Plattekill 6-7-1989
by resolution. Amendments noted where applicable.]
The developer shall establish and clearly mark on the site the limits
of the road 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.
A.
Prior to any clearing and grubbing, the developer shall
install appropriate erosion control measures, which shall include but not
be limited to hay bale silt barriers, silt fences, sedimentation traps and
temporary ditching or piping and the like, in order to prevent excessive on-site
erosion, damage to properties off site, deposition of silt or debris into
established drainage courses, streams or waterways or any other harmful effects
on the environment. The developer shall maintain these erosion control measures
throughout the construction period. The Planning Board and/or the Town Superintendent
of Highways may require from the developer detailed erosion and sedimentation
control plans and specifications as part of the construction plans approval
phase of the project.
C.
All roots and stumps shall be grubbed, excavated and
removed from the above areas. No stumps are to be buried within the right-of-way.
If stumps are to be buried on adjacent properties, their location shall be
shown on a map prepared by the developer.
A.
The developer shall complete the shaping of the right-of-way,
streams and ditches and easement areas to the line and grade as shown on the
approved plan and as otherwise may be directed by the Town Superintendent
of Highways. All unsuitable or unstable materials shall be completely excavated
and removed from the right-of-way, and all rocks or boulders larger than six
inches in diameter shall be excavated at least eight inches below the finished
subgrade of the 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, sheepsfoot, pneumatic-tired
or padded-wheel roller or by an impact rammer or vibrator equipment in areas
inaccessible to power rollers to achieve at least 95% of the maximum density,
Modified Proctor. All compaction shall continue until the fills are firm and
unyielding.
C.
The areas between the shoulder edge and the right-of-way
line must be graded and seeded in order to prevent erosion. All slopes, except
rock cuts, shall be covered with four inches of topsoil and shall be seeded,
mulched or otherwise planted to provide a hardy cover and to prevent erosion.
D.
The minimum treatment for areas not covered by pavement
is to be fertilized (5-10-5 fertilizer) at the rate of 20 pounds per 1,000
square feet with lime at the rate of 50 pounds per 1,000 square feet, seed
(perennial rye and crown vetch) at the rate of two pounds per 1,000 square
feet and mulch (hay or straw) at the rate of 100 pounds per 1,000 square feet.
A.
Buried utilities shall be designed and placed in accordance
with the standards of the local public utility and/or the Town of Plattekill.
B.
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. Bedding and backfilling are to be sufficient to protect
the pipe and to prevent settlement.
C.
Any additional drainage facilities not shown on the approved
plan and which may be ordered by the Town Superintendent of Highways shall
be constructed by the developer at the developer's expense and in accordance
with these specifications.
A.
Storm drain and culvert pipe may be of either corrugated
metal or reinforced concrete with a minimum diameter of 12 inches across driveways
and 15 inches for road drainage.
(1)
Round corrugated metal pipe and oblate corrugated metal
pipe shall conform to New York State Department of Transportation specifications,
with the following exceptions:
(a)
All corrugated metal pipe shall be galvanized and coated,
and the invert of the pipe shall be paved with bituminous material to a depth
of not less than 1/8 inch, measured over the crest of the corrugations on
the inside circumference. New York State Department of Transportation approved
polymer and Type II aluminized steel coatings are also acceptable. The minimum
steel gauge is 16.
(b)
All collars or connecting bands shall be 12 inches wide
and shall be furnished with bolts six inches long.
(2)
Reinforced concrete pipe shall be Class V and conform
to New York State Department of Transportation specifications.
(3)
All reinforced concrete pipe shall be manufactured with
slip joints or bell-and-spigot joints.
(4)
Each piece of reinforced concrete pipe shall be marked
with the specification number and the date of manufacture.
B.
Pipes of other material shall be approved by the Town
Superintendent of Highways.
The following specifications and figures show the minimum acceptable
construction for typical catch basins and curb inlets. Whenever, in the opinion
of the Town Superintendent, ground conditions or other circumstances require
it, larger or heavier materials, additional materials, reinforcing or other
modifications and improvements in design and construction shall be made as
directed by the Town Superintendent at any time prior to paving.
A.
Catch basins shall be constructed at all points of change
of slope or alignment and at all junction points.
B.
The excavation for the catch basin is to be at a depth
of 35 inches below the designated elevation of the invert of the effluent
pipe. Crushed stone or run-of-bank gravel to a uniform depth of nine inches
leveled and compacted over the entire area under the base shall be placed.
C.
All catch basins shall be of precast concrete conforming
to New York State Department of Transportation specifications and shall be
designed to sustain an H-20 highway loading plus 25% impact load.
D.
Catch basins having a depth greater than 48 inches from
the finished surface to the top of the concrete base shall be provided with
steps. Steps shall be of wrought iron having a minimum diameter of 3/4 inch
which shall be hot-bent to shape and hot-dipped galvanized or plastic coated
after bending. They shall be solidly set at the time of construction and shall
extend at least four inches into the wall. The steps shall extend 4 1/2
inches inside the wall of the catch basin. The top step shall be not more
than 18 inches below the finished surface and thence to the base steps shall
be no more than 12 inches apart.
A.
After completion of the rough grade and prior to the
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 under rolling
shall be filled with acceptable granular material and again rolled, this process
to be continued until no depressions develop. The subgrade shall not be muddy
or otherwise unsatisfactory when the foundation course is laid upon it.
B.
Geotextile drainage fabric (highway grade) shall be placed
over prepared subgrades where the subbase is wet or undrainable or when the
subbase material contains more than 20% silt/clay soils. Drainage fabric shall
be installed prior to the placement of the foundation base course and after
all utilities have been installed to the satisfaction of the Town Superintendent
of Highways.
A.
Before fine grading 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 extend equidistant from the center line of the road right-of-way
and shall conform to the typical cross sections of the road pavement and to
the approved line and grade.
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 run-of-bank gravel, crusher-run stone or crusher-run
gravel to the depths 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. The maximum diameter of the large particles
not exceeding 2/3 of the thickness of the compacted foundation course and
90% to 100% by weight of the particles shall be of such size as will pass
through a two-inch square hole, not more than 70% by weight pass the No. 40
mesh seive and not more than 10% by weight pass the No. 200 mesh seive.
The foundation course is to consist of the same type of granular material
as the base course, except that only crusher-run or a well-graded material
such as the previously designated New York State Department of Transportation
Item No. 4 is acceptable. The material must be capable of being graded to
within 1/4 inch of the final foundation course grade. Samples of the material
considered for use must be submitted in advance of use to the Town Superintendent
of Highways and Town Engineer.
A.
Materials.
(1)
The bituminous material shall meet the requirements of
702-31 (New York State Department of Transportation specifications), Asphalt
Emulsion or Cationic Asphalt Emulsion. The type of bituminous materials shall
be as specified on the plans or in the proposal unless otherwise directed
by the Town Engineer.
(2)
The aggregate shall meet the requirements of 703-02 (New
York State Department of Transportation), Coarse Aggregates, for the sizes
specified.
(3)
Hydrated lime shall meet the requirements of 712-04 (New
York State Department of Transportation specifications), Hydrated Lime.
(4)
The bituminous road mix shall generally be composed of
a mixture of aggregate, hydrated lime, if required, and bituminous material.
The mix shall be proportioned as specified in table below.
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Composition of Bituminous Road Mixtures
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|
Aggregate Sizes
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Mix 1 General Limits
(percent)1
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Mix 2 General Limits
(percent)1
| |
|
No. 2
|
75 to 85
|
--
| |
|
No. 1
|
15 to 25
|
75 to 85
| |
|
No. 1A
|
--
|
15 to 25
| |
|
Bituminous material2
|
4.0 to 6.03
|
4.7 to 6.73
| |
|
NOTES:
| |||
|
1 Percentage based on total aggregate weight.
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|
2 Percentage based
on total mix weight.
| |||
|
3 When asphalt emulsion material designation
702-31 is used, 0.2% to 0.3% of hydrated lime may be added to the mix to hasten
the break of the emulsion.
| |||
B.
Construction requirements.
(1)
General standards.
(a)
Bituminous material or mixture shall not be applied on
any soft surfaces, when the weather is wet, when the air temperature is below
50° F. in the shade or when the weather conditions would prevent proper
construction of the pavement.
(b)
The travel plant mixer and other equipment shall be capable
of continuously mixing aggregates with bituminous material in the specified
proportions in a mixer unit and then depositing the mixture on the prepared
base.
(c)
All equipment and the condition of the equipment shall
meet the approval of the Town Engineer.
(2)
Preparation of the base. The roadway surface to be covered
shall be free from holes, depressions, bumps, waves and corrugations. Any
unsuitable surface areas shall be repaired by replacement of the unstable
materials or by patching with a material to produce a tight surface having
the same elevation as the surrounding surface. The roadway shall be broomed
when ordered by the Town Engineer to remove loose material.
(3)
Mixing and spreading. The aggregate and asphalt shall
be thoroughly mixed so that the bituminous material is uniformly distributed
throughout and all aggregate particles are completely coated. If hydrated
lime is used to hasten the break of emulsion, the lime may be added to the
mix just prior to the discharge of the material from the mixer. The mixture
shall be deposited on the prepared base at the back of a mechanical spreader
in a uniform layer so as to produce the specified thickness after compaction.
(4)
Compaction. After spreading, the mixture shall be thoroughly
and uniformly compacted with a self-propelled steel-wheeled roller to obtain
a thoroughly compacted pavement. The number of roller passes to achieve the
desired compaction shall be approved by the Town Engineer.
(5)
Surface testing. The finished surface of the pavement
shall be tested with a sixteen-foot straight edge laid parallel with the center
line of the pavement. Any area exceeding a one-fourth-inch variation from
the surrounding area shall be satisfactorily corrected or removed and replaced.
(6)
Pavement sealing, final coat. Immediately after compacting
the road mix, No. 1A size stone meeting the requirements of 703-02 (New York
State Department of Transportation specification), Coarse Aggregates, at the
rate of 15 to 20 pounds per square yard shall be uniformly spread upon the
surface and the course rolled thoroughly. The pavement shall not be opened
to traffic for a minimum of three days after placing the No. 1A size stone
and before placing the seal coat. The seal coat shall be bituminous material
asphalt emulsion meeting the requirements of 702-31 (New York State Department
of Transportation specification) applied at the rate of 0.55 to 0.65 gallon
per square yard. This shall be immediately followed by an application of No.
1A aggregate at the rate of 15 to 20 pounds per square yard, which shall then
be rolled.
(7)
Pavement sealing, second coating. One year after the
first seal coat is placed, there shall be placed a second seal coat applied
to the full width of the road. The second coat shall be similar to the first
coat in every way, except that limited traffic is to be allowed three hours
after the completion of the seal coat for a period of 24 hours, at which time
all traffic is to continue.
A.
Ditches. There can be three types:
(1)
Type 1: stabilized soil and minimum treatment as per § A117-3, with shaping of ditch and application of fertilizer, lime, seed and mulch, to be used for slopes less than 2%.
(2)
Type 2: stabilized soil with a foundation course of four inches, similar to § A117-9, and either surface treatment or rip rap.
(a)
The surface treatment is to be as follows:
[1]
Asphaltic priming oil shall be applied at the rate of
0.5 gallon per square yard or as directed by the Town Superintendent of Highways.
[2]
The oiled surface shall be uniformly covered with sufficient
five-eighths-inch or one-fourth-inch crushed stone to completely cover over
the prime coat.
[3]
The prime coat must be allowed to penetrate and set for
about three days, or longer if so directed by the Township Superintendent
of Highways.
[4]
Prime surface cover material shall then be hand-broomed
or lightly drag-broomed to ensure that any excess cover material is evenly
distributed. If ordered by the Town Superintendent of Highways, excessive
loose stone shall be removed.
[5]
Rapid curing cutback asphalt material of a grade to be
determined or approved by the Town Superintendent of Highways shall then be
applied at the rate of 1/3 to 1/2 gallon per square yard.
[6]
This surface shall be uniformly covered with five-eighths-inch
to one-fourth-inch crushed stone and rolled with a five- to ten-ton power
roller.
[7]
Hand-broom or lightly drag-broom the surface to distribute
cover material evenly and reroll with a five- to ten-ton power roller to compact
and imbed cover material.
[8]
Any damage that may be done to the finished surface by
the movement of the contractor's equipment shall be repaired to the satisfaction
of the Town Superintendent of Highways by the petitioner before final acceptance
of the road, unless the petitioner is released from this obligation, in writing,
by the Town Superintendent of Highways.
(b)
Rip rap is to consist of large gravel or stone, sizes
from one inch 10% to 30% to two inches 70% to 90%. The rip rap is to be placed
in an even layer six inches in depth. A Type 2 ditch is to be used for slopes
over 2% and less than 6%.
(3)
Type 3. This is to be a motor-paved surface (two inches
thick) placed on a four-inch foundation course as in the Type 2 ditch or a
hot-mix asphalt surface (two inches) placed on a four-inch foundation course.
The foundation course is to be as in the Type 2 ditch. The Type 3 ditch is
to be used in all ditches of 6% or greater slope.
Guardrails are to be set on fill sections or other steep slope sections
where the slopes either within or adjacent to the right-of-way exceed a slope
of one vertical to four horizontal. Guard posts, beams and anchor sections
are to be approved by the Highway Superintendent and the Town Engineer.
Permanent monuments are to be approved by the Superintendent of Highways
and the Town Engineer and are to adhere to the following minimum requirements:
A.
Monuments are to be set at the beginning and end of all
straight courses.
B.
Monuments are to be set at all points of curvature (PC),
points of tangency (PT) and points of compound curvature (PCC) for all curved
sections.
C.
Monuments are to be set for culs-de-sac at a minimum
one point so as to reestablish the center point of the cul-de-sac.
D.
The number of monuments are to be such that at least
two monuments are on a line of sight from any monument.
E.
Only one side of a road need be monumented.
F.
Monuments are to be set at the intersection points of
the edges of all drainage easements and road limits.
G.
Monuments are intended to be permanent and are to be
of a type and material and set at a depth approved by the Highway Superintendent
and the Town Engineer. The developer's surveyor, licensed in the State
of New York, is to certify the location of all monuments with coordinates
relating to the subdivision boundaries.[1]
[1]
Editor's Note: The drawing of a typical road section which immediately
followed this section is on file in the Town Clerk's office and may be
inspected during regular business hours.
