[Ord. 96-2, 3/25/1996, § 1]
Construction, reconstruction, repair and maintenance of roads, streets and shoulders in the Township of New Hanover, when undertaken and performed by developers, subdividers, property owners, contractors, corporations, partnerships and/or any legal entity or individual, shall be in accordance and comply with the standards and specifications herein set forth and to the extent that such undertaking, activity or action is concurrent with, part of, or a condition of a subdivision or land development, such legal entity and/or individual shall in addition be required to comply with the terms and conditions of Chapter 22, Subdivision and Land Development, as is now in effect or is hereinafter enacted and/or amended from time to time by the Board of Supervisors of the Township of New Hanover. The terms, conditions, standards and specifications as adopted herein shall be in addition to the terms, conditions, standards and specifications set forth in Part 8 of Chapter 22, Subdivision and Land Development, specifically referencing the "design standards" as more fully set forth at length therein as are now in effect or are adopted and/or amended from time to time by the Board of Supervisors of New Hanover Township.
[Ord. 96-2, 3/25/1996, § 2]
This part shall govern all construction, reconstruction, repair
or maintenance of any new or existing roads or streets in the Township
under the jurisdiction of the Township Board of Supervisors.
[Ord. 96-2, 3/25/1996, § 3; as amended by Ord.
17-03, 3/27/2017]
1.
The bottom of the excavation and the top of the fill between the
outer limits of the paving or base course, when completed, will be
known as the subgrade and shall conform to the lines, grades, and
cross-sections given on the approved plans or as determined by the
Township Engineer or other person designated by the Township Supervisors.
The subgrade shall be solidly compacted to a firm and unyielding state
by rolling with a power roller, weighing 10 tons minimum. Unstable
areas shall be removed and replaced with suitable fill, and then re-rolled
as required to provide a uniform, even surface.
2.
Construction Methods. After the excavation or rough grading has been
performed and all drains have been constructed, the subgrade shall
be fine graded and shaped to the proper cross-section. It shall be
compacted to a firm unyielding surface by rolling the entire area
with an approved power roller having a metal weight of not less that
10 tons. Solid rock, boulders, soft clay, and all spongy material
which will not consolidate under the roller shall be removed from
the subgrade to a depth to be determined by the Township Engineer
or other person designated by the Township Supervisors. The space
shall be filled with suitable material from the excavation and the
subgrade re-rolled until it presents a smooth and firm surface of
the proper shape and cross-section. Crown board and straight edge
or string lines shall be used for checking road and street construction.
[Ord. 96-2, 3/25/1996, § 4; as amended by Ord.
17-03, 3/27/2017]
1.
This work shall consist of constructing a layer or layers of compacted
aggregate on a prepared subgrade area.
A.
Materials. The aggregate shall be stone, gravel, millings or slag
meeting the requirements of PaDOT Type C or better, No. 2A material
or approved equal.
B.
Construction Methods. The construction methods for the subbase shall
conform to the requirements as specified in Section 350.3 of
PaDOT Publication 408, latest edition.
C.
Unsuitable Subgrade. If at the time of construction, local unstable
subgrade conditions are encountered, the Township Engineer may require
that all areas of unstable subgrade be excavated to sufficient depth,
replaced with approved material and compacted to a density and stability
equal to or greater than the surrounding subgrade.
[Ord. 96-2, 3/25/1996, § 5; as amended by Ord.
17-03, 3/27/2017]
1.
Supporting shoulders shall be constructed on all sections of projects
where a base course or pavement is to be constructed without other
permanent support along the sides. All shoulders shall be thoroughly
compacted and graded to provide drainage from the macadam surface.
2.
Construction Methods. Where concrete curbing is not being installed,
paved shoulders are to be constructed adjacent to the paving of the
proposed road. The width and type of construction, grade, and construction
methods of these shoulders shall be determined by or shall meet the
approval of the Township Engineer or other person designated by the
Township Supervisors.
[Ord. 96-2, 3/25/1996, § 6; as amended by Ord.
17-03, 3/27/2017]
1.
Base, binder and wearing courses shall consist of one or more layers
of materials conforming to the requirement of the following sections
of PaDOT Publication 408, latest edition.
2.
Plant Mixed HMA Base Course.
A.
Superpave Asphalt Mixture Design HMA pavement courses shall be placed
in layers as is more fully described in PaDOT Publication 408, latest
edition, for each specific design, or as may be specified otherwise
by the Township.
B.
The subbase shall be properly prepared and primed as may be required
for base course placement according to PaDOT Publication 408, latest
edition.
C.
The base course shall be properly prepared and primed as may be required
to receive subsequent courses. Prior to application of additional
bituminous courses, existing base courses shall be inspected by the
Township representative for defects such as fracture, racking or other
signs of base failure, or potential failure. All areas of failure,
or potential failure, shall be removed by saw cutting, and replaced,
or repaired, to the satisfaction of the Township representative.
D.
Bituminous Surface Course. The surface course shall consist of two
courses, binder course and wearing course, of hot-mixed, hot-laid,
asphaltic concrete, constructed on a prepared base course. The bituminous
surface course shall have a total thickness, after final compaction,
as indicated in Table 21-2-1 or as specified by the Township Engineer
or other persons designated by the Township Supervisors.
(1)
Materials. The materials shall conform to the requirements as
given in Sections 309 and 409 of the PaDOT Specifications 408, latest
edition.
(2)
Construction Methods. The surface coursing shall be applied
in strict accordance with the requirements of PaDOT Publication Form
408, latest edition. No visible moisture shall be present prior to
the laying of each course. Road surface temperature shall be 50°
F. or greater prior to the laying of a bituminous surface. The air
temperature shall be 40° F. or greater with the temperature rising.
All bituminous surface courses shall have a total thickness after
compaction as indicated in Table 21-2-1 or as specified by the Township
Engineer or other persons designated by the Township Supervisors.
All edges shall be kept straight and sharp, forming a clean-cut line
between finished road and shoulder where shoulder construction is
used.
(3)
The binder course shall be installed immediately following the
base course installation.
(4)
Delivery Slips. New Hanover Township will require delivery slips
for all materials used in the construction of streets.
(5)
Joints. Joints formed by binder or surface course laid adjacent
to concrete curbs or other rigid structures shall be sealed with AC-20,
twelve-inch width as directed by the Township Engineer.
|
Table 21-2-1 Minimum Street Construction Standards
| |||
|---|---|---|---|
|
Local & Residential Streets
|
Collector & Arterial Streets
| ||
|
9.5 mm Surface Course
|
1 1/2"
|
1 1/2"
| |
|
19 mm Dense Graded Binder Course
|
2"
|
2"
| |
|
25 mm Bituminous Concrete
|
3"
|
4"
| |
|
PennDOT No. 2A Coarse Aggregate Subbase
|
4"
|
4"
| |
|
NOTES: (1) All thickness specifications are for compacted materials.
(2) Optional design cross-sections may be reviewed by the Township
Engineer, and approved by the Township, provided the design has a
structural number equal to or greater than that of the standard specification.
(3) Permanent cul-de-sac street, marginal access street, service street
and off-street parking construction shall conform to standards for
local and residential streets. (4) Binder course to be installed immediately
following base course installation.
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[Ord. 96-2, 3/25/1996, § 8; as amended by Ord.
17-03, 3/27/2017]
All work shall be subject to inspection by the Township Engineer
or authorized representative of the Board of Supervisors. Improper
workmanship and materials shall be corrected or replaced under penalty
of having the work rejected and the project refused for acceptance
and maintenance by the Township, and/or denial or refusal of municipal
escrow release requests, issuance of notice to stop work and any other
civil or municipal remedy available to the Township.
