The standards of design in this article should be used to judge
the adequacy of subdivision and land development proposals. Where,
in the opinion of the Planning Commission, literal application of
these standards in certain cases would work undue hardship or be plainly
unreasonable, the Planning Commission may recommend to the Council
such reasonable exceptions as will not be contrary to the public interest.
A. The standards included in these regulations are minimum design requirements.
B. Developers and subdividers shall, if deemed necessary by Borough
Council and upon the recommendation of the Borough Planning Commission,
provide areas and easements for schools and other public buildings,
parks, playgrounds and playfields, and rights-of-way and easements
for storm and sanitary sewer facilities in any area that cannot immediately
be joined to the existing storm and sanitary sewer systems of the
Borough.
C. Areas provided or reserved for such community facilities should be
adequate to provide for building sites, landscaping and off-street
parking as appropriate for the proposed use. Borough Council reserves
the right to accept or refuse offers of dedication for public uses.
The subdivider, developer, or builder shall construct and install,
with no expense to the Borough, the streets, curbs, sidewalks, water
mains, sanitary and storm sewers, streetlights, fire hydrants, street
signs, shade trees, monuments, lot pins, and other facilities and
utilities specified in this article. Construction and installation
of such facilities and utilities shall be subject to inspection by
appropriate Borough officials during the progress of the work.
The following principles of land subdivision and development,
general requirements and minimum standards of design shall be observed
by the subdivider, developer and builder in all instances:
A. All portions of a tract being subdivided shall be taken up in lots,
streets, public lands or other proposed uses, so that remnants and
landlocked areas shall not be created.
B. Whenever possible, applicants shall preserve trees, groves, waterways,
scenic points, historic spots and other community assets and landmarks.
C. Subdivisions and land developments should be laid out so as to avoid
the necessity for excessive cut or fill specifically warranted by
terrain or location.
D. Applicants shall observe the ultimate rights-of-way for contiguous existing streets as prescribed in this chapter. Additional portions of the corridors for such streets shall be offered to the government agency having jurisdiction at the time the subdivision or land development is consummated. Applicable building setback lines, as defined by Chapter
340, Zoning, shall be delineated as measured from the ultimate right-of-way line.
E. The Borough Council may modify or adjust the standards to permit
reasonable utilization of property while securing substantial conformance
with the objectives of the regulations.
F. Floodplain land shall not be subdivided or developed except in accordance with the floodplain regulations set forth in Chapter
340, Zoning.
G. Improvement construction requirements will be completed under specification
of the Pennsylvania Department of Transportation, the Pennsylvania
Department of Environmental Protection and the Montgomery County Soil
and Water Conservation District, or other appropriate agencies or
the specifications included herein. In the event of conflict, the
specifications contained in this chapter shall govern.
H. Where no public water supply is available to the subdivision or land
development, the Council may require the subdivider, developer, or
builder, to obtain from the district sanitarian of the Pennsylvania
Department of Health, certificates of approval as to the quality and
adequacy of the water supply proposed to be utilized by the subdivider,
developer, or builder, and approval of the type and construction methods
to be employed in the installation of the individual water supply
system.
I. Where the subdivision or land development is inaccessible to sanitary
sewers, the Council may require the subdivider, developer or builder,
to obtain from the district sanitarian of the Pennsylvania Department
of Health, certificates of approval of the sewage disposal facilities
proposed to be provided by the subdivider, builder or developer.
J. Proposed subdivisions and land developments shall be coordinated
with the existing nearby neighborhood so that the community as a whole
may develop harmoniously.
K. The proposed subdivision, land development and land use shall conform to Chapter
340, Zoning, to the Comprehensive Plan of the Borough of Trappe, and subsequent updates, and to all other applicable Borough ordinances and regulations.
All new streets and culs-de-sac, and widened portions of existing
rights-of-way intended for public use shall meet the following requirements:
A. Street system.
(1) Conformance with Borough development plans, county and state plans.
The development plans of streets shall conform to existing streets
and to such Borough, county and state road and highway plans as have
been duly adopted by said agencies.
(2) Arrangement. Streets shall be arranged in a manner which is consistent
with both existing and planned streets, and located so as to allow
proper development of surrounding properties. Collector and primary
arterial streets shall be connected with such existing streets and
highways to form continuations thereof. Residential streets shall
be laid out so as to discourage their use as collectors and primary
arterials. Where in the opinion of Borough Council it is desirable
to provide for street access to adjoining property, streets shall
be extended by dedication to the boundary of such property.
(3) Conformity with topography. Streets shall be adjusted to the contour
of the land so as to produce usable lots and streets of reasonable
grade, alignment and drainage.
(4) Grading. The street shall be graded to the full width of the right-of-way
and provision made for slopes beyond the right-of-way in conformance
with specifications.
(5) Provisions of streets for future development. Access shall be given
to all lots and portions of the tract in the subdivision and to adjacent
unsubdivided territory. Streets giving such access shall be improved
to the limits of the subdivision. Remnants, reserve strips and landlocked
areas shall not be created.
(6) New streets. New streets shall be designed to continue existing streets
at equal or greater right-of-way and cartway width, where practical.
(7) Dead-end streets. Dead-end streets are prohibited, unless designed
as culs-de-sac or designed for access exclusively to neighboring tracts.
(8) Street names. Continuations of existing streets shall be known by
the same name. Names for new streets shall not duplicate or closely
resemble names of existing streets. All street names are subject to
approval of Borough Council.
(9) Half streets. The dedication of half streets at the edges of a new
subdivision is prohibited. If the circumstances render this impracticable,
adequate provision for the concurrent dedication of the remaining
half of the street must be furnished by the subdivider, developer
or builder. When there exists a half street in an adjoining subdivision,
the remaining half shall be provided by the proposed development.
(10)
Private street. Whenever a subdivider or developer proposes
to establish a street which is not to be offered for dedication for
public use, Borough Council shall require the applicant to submit,
and also to record with the plan, a copy of the agreement made between
the Borough and the applicant, including his heirs and assigns. This
agreement must be signed by the Borough Solicitor, and shall establish
the conditions under which the street may later be offered for dedication.
The agreement should stipulate:
(a)
That the street shall conform to the Borough's specifications
or that the owners of the abutting lot shall include with the offer
of dedication sufficient money, as estimated by the Borough Engineer,
to restore the street to conformance with Borough specifications.
(b)
That an offer to dedicate the street shall be made only for
the street as a whole.
(c)
That agreement by the owners of 51% of the front footage shall
be binding on the owners of the remaining lots. Such condition shall
be noted in the deeds for these properties.
B. Street alignment.
(1) Sight distance. For all streets, a sight distance of 200 feet should
be maintained. Sight distance should be measured at the center line
of the street and at the driver's eye height of four feet.
(2) Horizontal curves. The minimum horizontal radius at the center line
for curves on primary roads shall be 500 feet; for collector roads,
they shall be 300 feet; and for local residential roads, they shall
be 150 feet. Minimum right-of-way for development along existing streets
will correspond with the ultimate right- of-way for these streets.
Except for local streets, there shall be a tangent of at least 100
feet measured at the center line between reverse curves.
(3) Vertical curves. Vertical curves shall be used at changes in grade
of more than 1%. The length of the curve shall approximate 50 feet
for each 1% change in grade. Over summits or bumps, vertical curves
shall not produce excessive flatness in grade.
(4) Street grades.
(a)
There shall be a minimum grade of at least 1% on all streets.
(b)
Grades in excess of 5% shall be avoided where possible, and
no grade shall exceed 10%. The grade shall be measured along the center
line.
(c)
All streets shall be graded to the grades shown on the street
profile and cross section plan submitted and approved with the final
plan of subdivision or land development. They shall be inspected and
checked for accuracy by the Borough Engineer.
(d)
Street intersections. The grade within 50 feet of any intersection
shall not exceed 3%.
(5) Right-of-way widths, paving widths and curbing.
(a)
New streets, extensions of existing streets. The minimum widths
of the ultimate right-of-way, the paving and the curbing shall not
be less than the following:
|
Widths
|
Curbing
|
---|
Right-of-Way
(feet)
|
Paving
(feet)
|
---|
Primary arterial
|
80
|
52
|
Required
|
Collector street
|
60
|
36
|
Required
|
Residential road
|
50
|
30
|
Required
|
Cul-de-sac
|
50
|
30
|
Required
|
(b)
Where subdivisions or land developments are proposed with frontage
along existing streets without paved cartways meeting the above requirements,
the applicant shall widen the cartway along their frontage to the
required half width.
(c)
Borough Council may also require widths in excess of these standards
where necessary for public safety and convenience.
(d)
Where on-street parking is proposed, the street paving shall
be widened a minimum additional 10 feet.
(e)
The areas between an existing right-of-way line and the ultimate
right-of-way line should be offered for dedication to the authority
having jurisdiction over the road when land is subdivided or developed
along an existing right-of-way.
(f)
Islands, medial strips and channelization may be required in
any area where traffic volumes warrant their use for safety and efficiency,
and may be permitted in any area at the discretion of the Borough
Council. Such devices on all roads must meet or exceed the requirements
of the Pennsylvania Department of Transportation.
(g)
To the greatest extent possible, through streets shall be provided.
The feasibility of a through street will be based on the physical
features of the development tract and/or adjoining lots, the potential
for extension of the street to adjoining lands based on existing development
patterns, restrictions imposed by other government regulations and
other recorded documentation, and the ability of the design to meet
all other requirements of this chapter.
[1]
Culs-de-sac should be utilized only where required by topography
and natural features. Culs-de-sac shall not be used where it is possible
to create grid pattern streets.
[2]
When cul-de-sac streets are proposed, the application shall
be accompanied by a written analysis of the merits of the design and
the reasons that a through street would not be practicable.
[3]
A cul-de-sac shall not be less than 250 feet in length nor more
than 500 feet in length measured from center of cul-de-sac to nearest
right-of-way line of intersecting street or in accordance with current
Pennsylvania Department of Transportation Liquid Fuel Reimbursement
Standards, except in cases approved by Borough Council where conditions
of the land so warrant the variation in length.
[4]
A cul-de-sac shall have a right-of-way of 50 feet and shall
have a circular turnaround with a minimum right-of-way radius to curb
line of 50 feet and an outer paving radius of 40 feet. The center-line
grade on a cul-de-sac street shall not exceed 10%, and the grade of
the diameter of the turnaround shall not exceed 5%.
[5]
A cul-de-sac shall not serve more than 20 lots.
[6]
The paved edge of a driveway entering a cul-de-sac shall be
a minimum of 12 feet from the right-of-way line.
(h)
Where it is proposed that a street be constructed to an abutting
property line with the intention that such a street will be extended
onto the property at a future date, a temporary circular turnabout
shall be built wholly within the right-of-way. The right-of-way, whether
permanent or temporary, shall have a minimum radius of 50 feet, and
the cartway of the turnabout shall have a radius of 40 feet.
(i)
No fences, hedges, shrubbery, walls, plantings or other obstructions
shall be located or be permitted within the right-of-way except for
ground covers, such as grass, ivy, or horizontally spreading shrubs
less than one-foot high, or retaining walls necessitated by street
widening and constructed by the authority having jurisdiction over
the street.
C. Street intersections.
(1) Number of intersections. No more than two streets shall cross at
the same point. Four-way intersections are to be avoided in the layout
of minor streets in residential areas when three-way or T-intersections
can be utilized. When existing streets intersect at odd angles or
have more than four approaches, the subdivider, developer or builder
shall be required to make corrective changes to eliminate the odd
angle or reduce the number of approaches to the intersection by curving
the lesser street.
(2) Minimum angle of intersection. Right-angle intersections shall be
used whenever practicable, especially when local streets empty into
primary or collector thoroughfares; there shall be no intersection
angle, measured at the center line, of less than 60°.
(3) Radii of pavement and right-of-way at intersection. Street intersections
shall be rounded with tangential arcs at pavement edge (curbline)
and right-of-way lines as listed below. Where two streets of different
right-of-way widths intersect, the radii of curvature for the widest
street shall apply.
|
Minimum Radius of Arc at Intersection of Pavement Edge or Curb
Line
(feet)
|
Minimum Radius of Arc at Intersection of Right-of-Way Line
(feet)
|
---|
Primary arterial
|
40 (or more as may be required)
|
20 (or more as may be required)
|
Collector street
|
30
|
20
|
Residential road
|
25
|
15
|
Cul-de-sac
|
25
|
15
|
(4) Sight line at intersections. Proper sight lines should be maintained
at all intersections of streets. Measured along the center line, there
should be a clear sight triangle of 75 feet, from the point of intersection.
No building, trees, hedges, shrubbery or other obstruction whatsoever
will be permitted in this area. Any obstruction to sight shall be
removed at the time a building or structure is erected.
(5) Center line. Where center line of streets open into opposite sides
of a major arterial within 100 feet of each other, they shall be made
to coincide by curving the minor street or streets.
D. Street paving. All street paving as well as driveways and parking
spaces shall be constructed in accordance with the following specifications:
(1) All streets, new streets and culs-de-sac, and widened portions of
existing rights-of-way intended for public use: 9.5 mm bituminous
wearing course, 19 mm bituminous binder course, on six-inch bituminous
concrete base course (BCBC), on h25 mm 2A stone subbase. Construction
shall conform to the current editions of PennDOT Publication 408/2003;
Publication 213; Publication 72M, Standards for Roadway Construction,
Series RC-1M to 100M; Publication 111M, Standards for Traffic Control
Signing, Series 7700 and 7800, current edition, including all supplemental
specifications, circular letters and amendments. All streets and related
features shall be constructed to the line, grade and dimension shown
on the plans, profiles and cross sections and typical sections as
approved on the final land development plan.
(2) Driveways intended for use by two or more families daily; driveways
intended for use by 10 or more workers daily; driveways providing
access to 10 or more parking spaces; parking areas comprised of 10
or more parking spaces: one-and-one-half-inch bituminous wearing course,
9.5 mm on two-inch bituminous binder course, 19 mm on eight-inch crushed
aggregate base course or approved equal.
(3) Driveways intended for use by more than two but fewer than 10 workers
daily; driveways providing access to more than two but fewer than
10 parking spaces; parking areas comprised of not less than three
nor more than nine parking spaces: one-and-one-half-inch bituminous
wearing course, 9.5 mm on two-inch bituminous binder course, 19 mm
on six-inch crushed aggregate base course (No. 4 ballast stone chocked
with fine aggregate) or approved equal.
(4) Driveways intended for use by one family: two-inch bituminous surface
course, 9.5 mm on six-inch 2-A stone base or approved equal.
(5) Each driveway shall:
(a)
Be properly graded for drainage.
(b)
Be maintained in good condition, free of weeds, dust, trash
or debris.
(c)
Consist of a minimum eighteen-foot-deep space, surfaced to whatever
extent necessary to allow use under all normal seasonal conditions
of weather, available for a temporary stopping, standing or storage
of one or more motor vehicle(s).
(d)
Comply with the driveway requirements of §
295-10, Reserve strips, easements, alleys, driveways.
(6) In order to reduce stormwater runoff and increase soil-water recharge,
the use of porous paving is encouraged.
(a)
Porous paving materials may be used in parking lots and driveways,
including overflow or temporary parking areas, when approved by Borough
Council upon the recommendation of the Borough Engineer. Porous paving
shall consist of a porous asphalt surface, three inches thick, consisting
of uniformly graded three-eights-inch aggregate, with an asphalt binder
equal to about 6% of the aggregate's dry weight on a layer of
small gravel, 1/4 to 1/2 inch in diameter on a reservoir of two-inch
to two-and-one-half-inch stone, which yields approximately 40% void
space in the cavity.
(b)
A depth of the reservoir may be as little as nine inches, but
must be deep enough to contain the water generated by the design storm
and may require extra volume to accommodate the percolation process.
Factors such as the slope of the site and the soil percolation rate
must be considered. The bottom and sides of the excavated reservoir
shall be covered by filter fabric capable of preventing sedimentation.
(7) The Borough Engineer shall determine if fill is required to be placed
below the required stone base of all driveways. The applicant shall
provide for all testing of earth materials as may be required by the
Borough Engineer to render said determination, including but not limited
to evidence of meeting DEP clean fill due diligence requirements.
(a)
All fill material must be approved by the Borough Engineer.
[1]
Imported fill material shall be free from debris, organic material,
brick, lime, concrete and any other material that, in the opinion
of the Borough Engineer, would prevent the adequate compaction and/or
performance of the fill material.
[2]
Structural fill material shall consist of well-graded granular
soil with a maximum particle size of three inches, less than 30% retained
on a three-quarter-inch sieve, and less than 15% fines (materials
passing the No. 200 sieve). The liquid limit of the fines shall not
exceed 35, and the plasticity index shall be a minimum of 15.
(b)
Fill material must be moistened or dewatered to obtain optimum
moisture for compaction.
(c)
Fill material shall be homogenous and shall be placed in such
a manner that it is free from lenses, pockets, voids and other imperfections.
(d)
Fill material shall be placed to extend at least one foot beyond
the edge of the driveway.
(e)
Fill shall be placed as a minimum eight-inch layer, compacted
to not less than 95% of maximum dry density as measured by ASTM D698.
(f)
The Borough Engineer shall inspect the fill and shall confirm
same has been correctly placed prior to the installation of the driveway's
stone base. In the event the applicant installs said stone base prior
to the Borough Engineer's inspection and confirmation, the Borough
Engineer may require the applicant to remove the stone base materials
to allow for said inspection and confirmation.
(g)
If the required density is not attained, the applicant shall
provide additional testing as may be required by the Borough Engineer
so as to determine adjustments needed to the minimum thickness of
the fill layer, the minimum thickness of the stone base, compaction
equipment, moisture content, and/or compactive effort.
E. Street names. All public rights-of-way, including alleys, streets
and roadways, shall be named and designated by the developer after
approval by the Borough Council upon recommendation of the Borough
Planning Commission. The developer shall be responsible and bear the
costs for erecting appropriate street signs as required by Borough
Council upon the recommendation of its engineer.
F. Streetlighting. The owner/developer will be responsible for the costs
of the erection and construction of such streetlighting as is deemed
necessary by the Borough. The Borough Engineer, in cooperation with
the public utility, will indicate the type, location and number of
streetlights to be provided. The subdivision and development plan
shall indicate the location of such streetlighting, and the type and
design thereof.
No subdivision or land development will be approved with the
property line extending through any portion of any existing structure,
unless the structure was obviously built to house more than one family
and the purpose of the subdivision is to separate the structure and
surrounding land into two or more parcels for different ownership.
A. If structure(s) is to remain:
(1) In residential zoning districts of the Borough, the lot and lot dimensions
of the newly created lot containing the structure(s) must be in scale
with the height and bulk of the structure, even if this requires a
lot area and/or dimension exceeding the minimum zoning requirement
for that district.
(2) In cases where the principal building use has not been as a dwelling, its conversion to a dwelling shall comply with all of the requirements of Chapter
340, Zoning, and the Building Code of the Borough.
B. If existing structure(s) is to be removed. Subdivision or land development
approval will be issued upon the condition of the expeditious removal
of the existing structure in complete conformity to all other Borough
procedural requirements. In commercial and industrial areas, plots
of land that have been cleared, as well as the existing vacant portions
of such lands should be developed in conformity with the long-range
needs of the area to the extent possible and all developmental requirements
embodied in the Building Code and zoning regulations shall be adhered
to.
C. If existing structure is to be replaced or expanded. Demolition plans
and/or construction plans must be detailed as part of the subdivision
plan review and subsequent subdivision approval will be conditional
upon compliance with said proposed details. Renovation work to the
remaining portion of a structure following partial demolition must
be completed promptly and expeditiously.
See Chapter
283, Stormwater Management, for additional requirements.
Whenever practicable, provision shall be made for suitable open
space for parks, playgrounds, and recreational areas. Due consideration
shall be given to the preservation of natural features, including
large trees, groves, waterways, scenic areas, historical spots, and
other community assets. In commercial areas, provisions shall be made
for suitable open space for walkways (connecting parking facilities
with commercial structures), malls, sitting areas, etc.
A. Dog walk areas. All residential developments possessing 30 or more
existing and/or proposed residential units shall provide an area for
a dog walk.
(1) Dog walk area, design criteria.
(a)
Dog walk areas shall be at least 1/2 acre for developments possessing
up to 30 existing and/or proposed units, and at minimum one acre for
developments possessing 31 or more existing and/or proposed units.
(b)
Dog walk areas shall be located no closer than 15 feet from
a property line, right-of-way or building.
(c)
Dog walk areas shall be located no closer than 100 feet from
wetlands, basins and water surface areas.
(d)
Dog walk areas shall not be located within parking areas.
(e)
For every 100 feet of perimeter, the dog walk area shall be
furnished with one covered trash receptacle, bag dispenser, and identification
sign.
(f)
Dog walk areas shall be surrounded by a fence, minimum four
feet height, chain-link or split rail with wire, equipped with a double-gated
entry.
(g)
For every 40 feet of perimeter, the dog walk area shall provide
one shade tree.
(h)
For every 1/2 acre, the dog walk area shall provide one bench.
(2) Dog walk area, ownership and maintenance.
(a)
The dog walk area shall be situated on land privately owned
and maintained by a homeowners' association, landlord, management
association, management company or like entity.
(b)
A maintenance schedule for the dog walk area shall be included
in the declaration for the community, or in a deed of restriction,
in a form acceptable to the Borough, to be recorded in and for the
Office of Deeds, Montgomery County.
B. Walkways in commercial areas.
(1) Commercial land development plans shall include walkways from parking
areas to building entrances, sitting areas, and adjacent residential
areas and community facilities (parks, cultural establishments, schools,
and government offices).
(2) Such walkways shall be:
(a)
Paved, concrete or asphalt.
(b)
Minimum width: five feet.
(c)
Minimum thickness: four inches.
The applicant or developer shall inform the Borough Building
Inspector of the delivery date of a modular and/or mobile home. The
Borough Building Inspector shall inspect the modular or mobile home
upon its arrival at the site prior to installation to determine if
any damage has occurred to the unit during transportation to the site
and to determine if it has been approved by the U.S. Department of
Housing and Urban Development. No modular unit or modular home may
be occupied before the Borough has received a copy of the structural
engineering bulletin(s) indicating approval by the U.S. Department
of Housing and Urban Development of the dwelling or the components
of the dwelling.