This article establishes and defines the public
improvements and design standards that the Township shall require
in the review, approval, and construction of any subdivision or land
development.
[Amended 11-14-2005]
All public streets of any new subdivision or
land development shall be built to the standards and specifications
contained herein, and to applicable state and federal highway department
specifications (e.g., Pennsylvania Department of Transportation Specifications,
Publication 408, latest revision). Where a subdivision or land development
abuts or contains any existing Township street or intersection, the
street(s) and intersection(s) shall be reconstructed for the full
paved width to the standards and specifications contained herein.
Pavement core samples as required in Subsection H below shall be taken
along the property frontage and analyzed by a professional testing
laboratory to serve as the basis for defining the existing road thickness.
The report of these findings and locations of samples shall be noted
on the Preliminary Plan.
A. Subgrade.
(1) The area within the limits of the proposed road surface
shall be shaped to conform to the line, grade and cross-section of
the proposed road.
(2) All unsuitable subgrade materials shall be removed
or stabilized.
(3) Encroachment into wetland areas or the Floodplain
Conservation District, where unavoidable, shall be done only after
all required permits for such encroachment are obtained from Pa. DEP,
FEMA, U.S. Army Corps of Engineers, or other agency having jurisdiction
over such areas. Where permitted, such areas shall be permanently
drained and stabilized. Subbase drains shall be installed where deemed
necessary by the Township Engineer during construction. The proposed
method of subgrade preparation for such areas shall be detailed on
the Subdivision or Land Development Plan.
(4) Fill material shall be suitable and thoroughly compacted
for its full width, including shoulder areas, in uniform layers of
not more than eight-inch thickness.
(5) The subgrade beneath cartways, shoulders and sidewalks
shall be thoroughly compacted to not less than 100% of the maximum
modified proctor density.
(6) Backfill of trenches within the cartway and curb area shall be thoroughly compacted prior to application of the base course. Refer to Subsection
F for trench backfill specifications.
(7) The subgrade shall be checked and approved by the
authorized Township Engineer for lines, grade, crown, contour, suitable
materials and compaction before any succeeding courses are applied.
(8) Crown board and straight edge shall be used for checking
road and street construction. Maximum deviation shall not exceed 1/4
of an inch.
B. Base course.
(1) Base course shall consist of the following materials,
installed as specified by Pennsylvania Department of Transportation.
Bituminous concrete base course (BCBC), four inches thick installed
on top of eight inches of Pennsylvania Department of Transportation
subbase material.
[Amended 11-14-2005]
(2) The base course shall be rolled uniformly and thoroughly
compacted according to requirements of PennDOT Publication 408. Rolling
shall continue until the material does not creep or wave ahead of
the roller wheels.
(3) The base course shall extend 12 inches beyond the
edge of paving on all streets constructed without a curb.
(4) In fill areas over three feet thick, compaction tests
are required in each eight-inch layer at one-hundred-fifty-foot intervals.
The tests must be performed by a certified testing laboratory and
results submitted to the Township Engineer. All compaction must be
100% of the maximum modified proctor density. Any layer not meeting
this standard shall be removed or rerolled until suitable compaction
is obtained.
(5) After compaction of the base stone, dry screenings
shall be applied in sufficient quantity to fill all of the voids in
the rolled stone base. A vibratory roller, of PennDOT approved design,
must be used in this step of construction and rolling shall continue
until all voids are filled. Small areas around inlets and manholes
that cannot be reached by the vibratory roller shall be compacted
with a mechanical tamper or whacker.
(6) When the stone surface is tight and will accept no
more screenings, all loose screenings shall be broomed from the surface
to expose the top 1/2 inch of the aggregate over at least 75% of the
road.
(7) No base material shall be placed on a wet or frozen
subgrade.
(8) When so required by the Township Engineer, a tack
coat shall be applied.
C. Bituminous surface.
(1) Bituminous material shall be ID-2 with four inches
of binder course and 1 1/2 inches of wearing course.
(2) The completed road surface shall have a uniform slope
of 1/4 inch per foot from edge to center line, except that on super-elevated
curves, this slope shall not be less than 1/4 inch per foot and shall
extend up from the inside edge to the outside edge of the paving.
(3) No visible moisture shall be present prior to the
laying of each course. Road surface temperature shall be 50° F.
or greater prior to laying of the bituminous surface, with the air
temperature rising.
(4) All wearing surface courses shall be sealed to the
concrete curb and at its joint with existing streets and driveways
with a one-foot-wide Class BM-1 asphalt gutter seal.
(5) Application of all bituminous layers of roadway paving
shall require full-time inspection by the Township or its authorized
representative.
D. North Coventry Township shall require delivery slips
for all materials used in the construction of streets.
E. Grading and shoulders.
(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.
(2) Roadways shall be graded for not less than eight feet beyond the edge of the proposed paving on each side. This grading width shall be increased as necessary where sidewalks and/or planting strips are to be provided. Shoulders shall be compacted and graded with a slope of one inch per foot, unless otherwise permitted in Subsection
F(3) below. Beyond the limits of this grading, banks shall be sloped to prevent erosion but this slope shall not exceed one vertical to three horizontal to one vertical, with tops of slopes in cuts rounded. Steeper slopes shall only be permitted where excessive cut or fill would otherwise be required.
(3) In cases where swales must be provided in the right-of-way
area outside of the paved cartway, cut slopes shall be limited to
one vertical to two horizontal and fills shall be limited to one vertical
to three horizontal.
F. Backfilling of road excavations. All trenches or other
excavations in existing or proposed roads shall be backfilled in accordance
with the following:
(1) Backfilling shall be done as promptly as possible.
(2) The trench shall be backfilled with coarse aggregate
consisting of screenings, 2RC, 2A modified or other aggregate as approved
by the Township Engineer to a height of at least one foot above the
top of the conduit, pipe, or pipe bell. These screenings shall be
placed with the hand shovels and not from trucks or with the use of
power equipment and shall be free from refuse, boulders, rocks, unsuitable
organic material or other material which, in the opinion of the Township,
is unsuitable.
(3) When the pipe is located in a dedicated street or
any place where paving (including driveways) may be placed, the remainder
of the trench shall be backfilled with 2RC or other approved materials
and promptly compacted. The backfill material shall be mechanically
tamped in approximately six-inch layers.
(4) Where openings have been made in existing Township
roads, paving shall be restored in accordance with the paving standards
contained in this chapter. Openings made in state roads shall be restored
in accordance with the Pennsylvania Department of Transportation specifications.
Permits shall be obtained before paving is opened in any existing
state or Township road.
(5) Where openings are made behind the curbline, work
shall be as specified below. The opening shall be covered with good
topsoil to a depth of six inches and seeded or sodded to the satisfaction
of the Township Engineer.
(6) Whenever the trenches have not been properly filled
or if settlement occurs, they shall be refilled, compacted, and graded
to conform to the surface of the ground.
(7) Frozen earth shall not be used for backfilling, nor
shall any backfilling be done when materials already in the trench
are frozen.
(8) Where excavated material, or any portion thereof,
is deemed by the Township Engineer to be unsuitable for use as backfill,
the applicant or applicant's agent shall replace backfill material
with material approved by the Township.
G. The applicant shall be responsible for notifying all
emergency service agencies when construction will impact accessibility
on existing roads.
H. All pavement core samples as required by sections
of this chapter, or as required by the Township Engineer, shall adhere
to the procedures and specifications contained herein. The number
of samples, size and locations shall be determined by the Township
Engineer. Pavement core samples shall be taken to a depth that includes
the earthen subgrade. Appropriate permits, as applicable, for sampling
work shall be properly secured by the applicant's consultant(s). Core
sample holes shall be filled with bituminous wearing course material,
compacted and sealed with asphalt sealer. Core repairs, or any resulting
damage, shall be inspected and repairs performed to the satisfaction
of the Township Engineer.
[Added 11-14-2005]
Private streets will be permitted to serve no
less than two nor more than three lots, and only when proper maintenance
is guaranteed by the developer and when in accordance with the requirements
outlined below. Private streets shall be clearly identified as such
on each preliminary and Final Plan. Deeds transferring any lots served
by such a private street shall identify the street as a private street
to be privately maintained. Private streets shall be prohibited in
nonresidential subdivisions.
A. Design standards.
(1) Widths. Private streets shall have a right-of-way
of 50 feet and a minimum paved cartway width of 16 feet. Shoulders
shall be provided to a minimum width of four feet on either side of
the paving, constructed in accordance with the sketch in Appendix
D. Curbing is not required except as deemed necessary under
certain circumstances, such as to alleviate a critical stormwater
condition, or as required by the Township Engineer.
(2) Grades. Where no further subdivision is possible, the maximum allowable grade of the paved cartway shall be 15%; otherwise, the maximum allowable grade shall be as required by §
320-38C. The minimum center line grade shall be 1% to facilitate drainage. A five-percent grade or less shall be maintained within the public road right-of-way and for a minimum of 25 feet beyond. Where a greater than five-percent grade is involved, one parking space per lot served shall be provided at the entrance from the public street, adjacent to but outside of the public right-of-way.
(3) Cartway construction requirements.
(a)
Grades up to 5%.
|
Subgrade
|
Construct according to § 320-40A of this chapter
|
|
Stone base
|
3A modified, 6 inches thick after compaction
|
|
Stone surface
|
2A modified, 2 inches thick after compaction
|
(b)
Grades greater than 5% and up to 15%.
|
Subgrade
|
Construct according to § 320-40A of this chapter
|
|
Base course
|
Crushed aggregate base course consisting of
AASHTO No. 1 Stone with screenings (from PennDOT publication "Seldom
Used Specifications"), 6 inches thick after compaction
|
|
Stone surface
|
2A modified, 2 inches thick after compaction
|
(c)
First 50 feet from public street.
|
Subgrade
|
Construct according to § 320-40A of this chapter
|
|
Base course
|
2A modified, 6 inches thick after compaction
|
|
Paving
|
The base surface course shall be shaped and
rolled to provide a two-inch crown or shall be sloped laterally to
facilitate drainage and shall be covered with 1 1/2 inches of
ID-2 compacted binder course followed by one inch of ID-2 compacted
wearing course. This requirement may be reduced or waived in the event
the street that it intersects is not paved.
|
(4) Other construction requirements.
(a)
Intersection with public street. At the intersection with a public street, the private street shall be provided with paved 25 foot radii. The intersection shall meet the sight-distance criteria of §
320-39G of this chapter. The Township may consider waiving this requirement if the public street is not paved.
(b)
Turnaround. A turnaround facility for use by
passenger, service, and emergency vehicles shall be provided within
the right-of-way, at the end of the private street most distant from
the public street. A turnaround shaped in a "T" or a "Y" configuration
shall be provided, with the top of the "T" being 50 feet long by 20
feet wide. In the event the private street does not initially, but
is later to be extended to the last house or lot on the street, the
interim turnaround may take the form of a street extension 20 feet
beyond the second driveway with the "T" or "Y" configuration turnaround.
(c)
Drainage. Drainage swales, culverts, and curbing
shall be provided, when required, to minimize stormwater and icing
problems at the intersection and along the private street length.
(d)
Backfilling. Private streets shall comply with the requirements of §
320-40F for the backfilling of road excavations.
B. Agreement.
(1) As a condition to Final Plan approval, an agreement
providing for maintenance, repair, construction, and reconstruction,
including drainage facility maintenance and snowplowing of private
streets, shall be submitted to the Township and recorded with the
approved Final Plan. The deed for each new or existing lot fronting
on the private street shall reference the agreement.
(2) The agreement shall also contain the conditions under
which the street may later be offered for dedication. The conditions
shall state that at the time of offer for dedication the street must
conform to the Township public street specifications or that the owners
of the abutting lots shall include with the offer of dedication sufficient
money, as estimated by the Township Engineer, for the Township to
bring the street into conformance with Township specifications in
effect at the time of dedication.
C. Information required for private streets. The following
information shall be included with the (preliminary/Final) Subdivision
Plan when a private street is proposed:
(1) Existing and proposed contours at two-foot contour
intervals based upon an accurate field topographic survey.
(2) Center line profile of the street.
(3) Drainage details for swales and culverts.
(4) Typical cross-sections of the cartway and right-of-way.
(See Appendix D.)
(5) Cartway construction specifications.
[Amended 1-27-2014; 4-7-2014 by Ord. No.
10]
All aspects, provisions, and standards regarding stormwater management shall be in accordance with Chapter
194 Grading, Erosion and Sediment Control; Stormwater Management of the North Coventry Township Code.
[Amended 1-27-2014; 4-7-2014 by Ord. No.
10]
All aspects, provisions, and standards regarding soil erosion, sediment control and grading shall be in accordance with Chapter
194 Grading, Erosion and Sediment Control; Stormwater Management of the North Coventry Township Code.
[Amended 1-27-2014; 4-7-2014 by Ord. No.
10]
All aspects, provisions, and standards regarding information requirements for stormwater management, soil erosion, and sediment control plans shall be in accordance with Chapter
194 Grading, Erosion and Sediment Control; Stormwater Management of the North Coventry Township Code.
Initial construction on the subdivision site
shall consist of stripping and stockpiling of topsoil from all areas
to be disturbed. Upon completion of other construction, the entire
amount of topsoil stripped shall be replaced on the subdivision site.
A. No topsoil shall be disposed of, by sale or otherwise,
off the site of the subdivision or land development.
B. Subsoil may be disposed of at the option of the applicant
or applicant's agent.
C. Topsoil and subsoil shall be piled separately and
not intermixed.
The design and landscaping of required off-street parking shall be in compliance with Article
XII, Off-Street Parking and Loading Provisions, of Chapter
370, Zoning.