Detailed specifications for materials and construction shall
be provided by the office of the Town Engineer.
A. Subgrade.
(1) The entire right-of-way shall be cleared of brush and trees except
those which will be an asset to the subdivision landscape.
(2) All boulders, organic material, soft clay, spongy soil and other
objectionable material shall be removed and replaced by material approved
by the Town Engineer.
(3) The subgrade shall be properly stabilized, shaped, rolled and uniformly
compacted with a ten-ton roller to conform to the lines, grades and
typical cross sections of this specification and the approved final
plat profile drawings. The process of shaping, rolling and filling
shall be repeated until no depressions develop.
(4) All rutting, displacement or soft spots after the subgrade has been
completed shall be properly repaired with new material, regarded and
compacted.
(5) When existing materials in the road are to be used for road base
material, that material shall be removed to the surface of the subgrade
so that the subgrade may be properly prepared before the base is constructed.
(6) Cuts and fills shall have a maximum slope of one on three from the
edge of the right-of-way, except when specifically waived by the Planning
Board and the Town Engineer for the purpose of saving trees or some
particular terrain feature at the given place.
B. Paving. (See Table I, Minimum Required Construction Types and Right-of-Way
Widths, for application of paving types.) Paving requirements shall
be as follows:
(1) Type A paving:
(a)
Subgrade: as indicated in Subsection
A above.
(b)
Base course: six-inch stabilized soil base.
(c)
Leveling course: one-and-one-half-inch bituminous concrete (run-of-bank
aggregate).
(d)
Surfacing course: one-and-one-half-inch bituminous concrete
(crushed stone aggregate).
(e)
Refer to §
248-37B(1) of "Construction Specifications for Public Improvements."
(2) Type B paving:
(a)
Subgrade: as indicated in Subsection
A above.
(b)
Subbase course: six-inch stabilized soil base.
(c)
Base course: four-inch penetration macadam.
(d)
Surfacing course: one-and-one-half-inch bituminous concrete
(crushed stone aggregate).
(e)
Refer to §
248-37B(2) of "Construction Specifications for Public Improvements."
(3) Type D paving:
[Amended 9-26-1967; 3-12-1974]
(a)
Base course: four-inch asphalt concrete plant mix.
(b)
Surfacing course: one-and-one-half-inch bituminous concrete
(crushed stone aggregate).
Table I
Minimum Required Construction Types and Right-of-Way
Widths[Amended 9-26-1967; 6-5-1968; 9-2-1969]
|
---|
Location of Street by Zoning District
|
Right-of-Way Width
(feet)
|
Paving Type and Width
(feet)
|
Sidewalk Width
(feet)
|
Curbs
|
---|
R-43 and R-21
|
|
|
|
|
|
Major streets
|
60
|
B - 36
|
4
|
Yes
|
|
Minor streets
|
50
|
B - 30
|
None
|
Yes
|
R-15, R-10 and R-10S
|
|
|
|
|
|
Major streets
|
60
|
B - 36
|
4
|
Yes
|
|
Minor streets, R-15
|
50
|
B - 30
|
None
|
Yes
|
|
Minor streets, R-10 and R-10S
|
50
|
B - 30
|
4
|
Yes
|
RM-7
|
|
|
|
|
|
Major streets
|
60
|
B - 36
|
4
|
Yes
|
|
Minor streets
|
50
|
B - 30
|
4
|
Yes
|
PRD
|
|
|
|
|
|
Major streets
|
60
|
B - 36
|
4
|
Yes
|
|
Minor streets
|
50
|
B - 30
|
4
|
Yes
|
SCB, NB, OB and CB
|
80
|
D - 40
|
6
|
Yes
|
LI and HI
|
60
|
D - 40
|
4
|
Yes
|
C. Curbs and gutters (see Drawing I, Curb and Gutter Cross Sections,
for dimensions).
(1) The following curbs shall be used:
(b)
Battered reveal concrete curb.
(2) Integral concrete curb and gutter shall be used wherever the gradient
exceeds 4%.
D. Pavement crown: 0.3 inch per foot.
E. Driveway aprons.
(1) All driveways or other parking areas shall have driveway aprons extending
from the curbline to the property line.
(2) Driveway aprons shall be of the same construction specification as
the street paving or equal.
(3) Driveway aprons shall be at least 10 feet wide at the curb face and
at least seven feet wide at the property line, with a step at the
curb cut face of one inch.
F. Sidewalks.
(1) All sidewalks shall be four inches thick and at least four feet wide,
constructed of one-course concrete or equal, except that a sidewalk
laid across driveway aprons shall be six inches thick.
(2) All sidewalks shall be located within the street right-of-way, the
outside edge to be contiguous with the right-of-way boundary.
G. Street signs, streetlights, traffic controlling signs, signals, markings
and restraining devices, including street name signs, shall be designated
as to location and type by the Traffic Safety Department and in accordance
with the construction specifications for public improvements as adopted
and amended by the Planning Board, New York State Manual of Uniform
Traffic Control Devices and the Suffolk County Department of Public
Works latest specifications for the installation of traffic signals.
[Amended 6-10-1975; 11-24-1981]
H. Street trees.
(1) Street trees shall be provided in all subdivisions.
(2) Trees shall be of nursery stock of an approved species grown under
the same climatic conditions as at the location of the development.
They shall be of symmetrical growth, free of insect pests and disease,
suitable for street use and durable under the maintenance contemplated.
(3) The average trunk diameter measured at a height of six feet above
the finished ground level shall be a minimum of two to three inches,
depending on good practice with references to the particular species
to be planted.
(4) Trees shall be planted at intervals of from 40 to 60 feet apart,
depending upon the species, along both sides of the street and shall
be located within the street right-of-way three feet six inches from
the edge of the street pavement. The Planning Board may waive this
specification in favor of planting an equivalent number of trees in
landscaped groups.
(5) All planting shall be done in conformance with good nursery and landscape
practice.
I. Planting strips. All planting strips within the road rights-of-way
shall be finish graded, properly prepared and seeded or sodded with
lawn grass in conformance with good nursery and landscape practice.
J. Monuments. Monuments shall be of reinforced concrete or stone, shall
be four inches square with a length of at least 36 inches and shall
be embedded the full depth.
K. Planting: limited access and planting areas. All limited access and
planting areas shall be planted in conformance with the detailed specifications
for materials and construction noted above, provided that:
(1) Suitable plant materials already in place may be used when approved
by the Town Engineer.
(2) Where incompatible land uses are located adjacent to such limited
access and planting area, the Planning Board may require a screen
fence (wire fabric vinyl-coated redwood slat) in accordance with Town
specifications.
[Amended 12-20-1966]
L. The Town Engineer and the Town Superintendent of Highways, upon a joint determination by them, may accept equal or better specifications in lieu of any of the specifications set forth herein in Subsections
A through
K above when, in their judgment, such alternates accrue to the public benefit.