A.
The design standards and requirements as outlined
in this article shall be utilized by the Board of Supervisors in evaluating
the plans for all proposed subdivisions and land developments.
These design standards and required improvements
shall be in addition to the following:
A.
All applicable Township, county, state and federal
statutory provisions and/or regulations.
B.
All governing rules and regulations of the Pennsylvania
Department of Environmental Protection.
C.
The applicable regulations and design standards of
Pennsylvania Department of Transportation.
D.
Whenever another Township, county, state or federal
statute and/or regulation imposes a higher or more restrictive standard
than those contained in this chapter, the higher or more restrictive
standard shall apply.
A.
The land for any proposed subdivision or land development
shall be suited for the purpose of intended use.
B.
Land which the Board of Supervisors deems unsuitable
for subdivision or development due to flooding, improper drainage,
rock formations, adverse earth formations or topography, steep slopes,
utility easements or other features which may reasonably be harmful
to the safety, health and general welfare of the present or future
inhabitants of the subdivision and/or its surrounding areas shall
not be subdivided or developed unless adequate methods are formulated
by the applicant and approved by the Board of Supervisors upon the
recommendation of the Township Engineer.
C.
The approval of a plan for any proposed subdivision
or land development shall not constitute a representation, guarantee
or warranty of any kind by the Township, any official, any employee
or agent thereof of the practicability or safety of the use of such
land or development and shall create no liability upon the Township,
its officials, employees or agents.
The applicant shall place permanent reference
monuments and markers by a registered land surveyor.
A.
Monuments shall be placed so that the center of a
scored or marked point shall coincide exactly with the intersection
of the lines to be marked.
B.
Monuments shall be of concrete or stone, with a flat
top having a minimum width or diameter of four inches and a minimum
length of 30 inches. Concrete monuments shall be marked with a three-fourths-inch
copper or brass dowel; stone or precast monuments shall be marked
on the top with a proper inscription and a drill hole. Monuments shall
be set so that the top of the monument or marker is level with the
surface of the surrounding ground.
C.
Markers shall consist of either iron or steel bars
at least 36 inches long and not less than 5/8 inch in diameter. Markers
normally shall be flush with the surrounding grade.
D.
Monuments shall be set as follows:
(1)
One at each single angle of the perimeter of the property
at all major subdivisions and land developments.
(2)
One at the beginning and end of all curves along street
right-of-way lines along one side of the street.
(3)
A minimum of one at each street intersection along
the street right-of-way line.
E.
Markers normally shall be flush with the surrounding
grade.
A.
All subdivisions and land development for residential use shall be in conformance with the applicable minimum lot sizes, lot widths in yard requirements as set forth in Chapter 255, Zoning.
B.
Each lot or area platted for residential use shall
be accessible from an existing or proposed street.
C.
The lot depth shall not be greater than three times
its width.
D.
Side lines of lots shall be at right angles to straight
streets and on radius lines on curved streets. Some variation may
be permitted at the discretion of the Board of Supervisors, but pointed
or very irregular shaped lots shall be avoided.
E.
In the case of lots utilizing an on-site sewage disposal
system, there shall be sufficient area for the disposal field in accordance
to DEP regulations.
F.
Double frontage lots shall be avoided but may be permitted
when required to provide a separation of a residential development
from arterial streets or to overcome specific disadvantages of topography
or other natural features of the site.
G.
Lots shall be laid out so as to provide positive drainage
away from all buildings, and individual lot drainage shall be coordinated
with the general storm drainage pattern for the area. Drainage shall
be designed so as to avoid concentration of storm drainage water from
each lot onto adjacent lots.
A.
Any proposed subdivision or land development shall
have frontage upon or access to an existing state, county or Township
road.
B.
Streets shall be designed to provide adequate vehicular
access to all lots or parcels within any proposed subdivision or land
development.
C.
Streets shall be designed and appropriately related
to the topographic conditions of the site, with the grade of streets
conforming as closely as possible to the original topography.
D.
Streets shall be graded and improved in accordance
with the appropriate design standards and specifications of this chapter.
E.
All streets shall be properly integrated with the
existing and proposed system of streets and dedicated right-of-way
as established in the Comprehensive Plan.
F.
All streets shall be property related to specific
traffic generators such as industries, business districts, schools,
churches and shopping centers; to population densities; and to the
pattern of existing and proposed land uses.
G.
Proposed streets shall be extended to the boundary
lines of the tract to be subdivided, unless prevented by topography
or other physical conditions, or unless in the opinion of the Board
of Supervisors such extension is not necessary or desirable for the
coordination of the layout of the subdivision with the existing layout
or the most advantageous future development on adjacent tracts.
H.
Any residential subdivision and/or land development
containing 10 or more lots which do not front upon an existing off-site
public road shall provide within the overall traffic design of the
site not less than two separate points within the site where an interior
road as part of the proposed subdivision and/or land development shall
intersect with and provide access to an existing off-site public road.
The applicant may propose names for all streets
within a subdivision or land development prior to final approval.
A proposed street name shall not include the name of any existing
street in the Township, except that a street when planned as a continuation
of an existing street shall bear the same name. Final approval of
street names for streets subject to public dedication to the Township
shall be vested with the Foster Township Board of Supervisors. Final
approval of street names for streets to remain under private ownership
shall be vested with the Board of Supervisors.
Street signs, which provide the legal name of
each street, shall be erected at the intersection of each street within
a subdivision or land development prior to final approval. The size,
color and construction materials of said signs shall be subject to
approval by the Board of Supervisors.
Traffic control signs, designed to regulate
the speed of traffic or to convey any other pertinent traffic or physical
characteristic of the road to motorists, shall be installed at appropriate
locations by the applicant as determined by PennDOT, Luzerne County
or the Board of Supervisors.
The arrangement of streets shall provide for the continuation of principal streets between adjacent properties when such continuation is necessary for convenient movement of traffic, effective fire protection, for efficient provision of utilities, and when such continuation is in accordance with the Township's goals as provided for within the statement of community development objectives of Chapter 255, Zoning. If the adjacent property is undeveloped and the street must be a dead-end street temporarily, the right-of-way shall be extended to the property line. A temporary turnabout shall be provided on all temporary dead-end streets. This may limit the length of temporary dead-end streets in accordance with the design standards of these regulations.
Where a road does not extend to the boundary
of the subdivision and its continuation is not required by the Board
of Supervisors for access to adjoining property, its terminus shall
normally not be nearer to such boundary than 50 feet. However, the
Board of Supervisors may require the reservation of an appropriate
easement to accommodate drainage facilities, pedestrian traffic or
utilities. A cul-de-sac turnaround shall be provided at the end of
a permanent dead-end street in accordance with Township construction
standards and specifications. For greater convenience to traffic and
more effective police and fire protection, permanent dead-end streets
shall, in general, be limited in length in accordance with design
standards of this chapter.
Where a subdivision or land development borders
on or contains an existing or proposed arterial street, the Board
of Supervisors may require that access to such street be limited by
one of the following methods:
A.
The subdivision of lots in a manner in which the lots
front onto a parallel local street with no access provided to or from
the arterial street, which shall contain a strip of screening along
the rear property line of such lots.
B.
A series of culs-de-sac, U-shaped streets or short
loops entered from and designed generally at right angles to such
a parallel street, with the rear lines of their terminal lots backing
onto the arterial.
C.
A marginal access or service road, separated from
the arterial street by a planting or grass strip and having access
thereto at suitable points.
A.
Streets shall intersect as nearly as possible at right
angles. When local streets intersect with collector or arterial streets,
the angle of intersection at the street center lines shall in no case
be less than 75°. No two streets shall intersect with an angle
of intersection at the center lines of less than 60°.
B.
Multiple intersections involving the junction of more
than two streets shall be prohibited.
C.
Intersections shall be designed with a flat grade
wherever practical. In hilly or rolling areas, at the approach to
an intersection, a leveling area shall be provided having not greater
than a 2% grade at a distance of 60 feet, measured from the nearest
right-of-way of the intersecting street.
D.
Where any street intersection will involve earth banks
or existing vegetation inside any corner lot that would create a traffic
hazard by limiting visibility, the applicant shall cut such ground
and/or vegetation (including trees) in connection with the grading
of the public right-of-way to the extent deemed necessary to provide
an adequate sight distance.
E.
The cross slopes on all streets, including intersections,
shall be 3% or less.
A.
Standards shall be established in order to provide
for roads of suitable location, width and improvement to accommodate
prospective traffic and to afford satisfactory access to police, firefighting,
snow removal, sanitation and road maintenance equipment and to coordinate
streets so as to compose a convenient system and avoid undue hardships
to adjoining properties.
B.
The classification of any street, when not identified
within any Comprehensive Plan adopted by Foster Township, shall be
determined by the Board of Supervisors by utilizing applicable definitions
of this chapter.
C.
Subgrade and base specifications.
(1)
The subgrade of all streets shall be rolled and prepared
in accordance with PennDOT specifications as contained in the applicable
sections of the most recent edition of Publication 408, or the most
recent edition of Publication 408, including any subsequent revisions
and/or amendments thereto. The following conditions shall also apply
to the subgrade:
(a)
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.
(b)
All unsuitable subgrade material shall be removed
or stabilized.
(c)
Wet areas, excluding wetlands, shall be permanently
drained and stabilized. Details shall be furnished on the method of
drainage and shall by approval by the Township Engineer.
(d)
Areas requiring fill shall be made with suitable
materials and thoroughly compacted for full width in uniform layers
not more than eight inches thick per layer.
(e)
The subgrade shall be thoroughly compacted by
rolling with a minimum ten-ton roller and or a sheepsfoot roller in
layers not greater than six inches.
(f)
Backfill for trenches within the cartway and
curb area shall be thoroughly compacted prior to the application of
the base course.
(g)
All stone used to replace unsuitable subgrade
materials shall be subject to prior approval by the Township Engineer.
(2)
The base for all streets, unless otherwise specified,
shall contain a minimum of six inches of stone subbase placed upon
a prepared and compacted subgrade. The required minimum of six inches
of stone subbase material shall be determined by site conditions.
The construction of the base for all streets shall be in accordance
with PennDOT specifications as contained in the applicable sections
of the most recent edition of Publication 408, or the most recent
edition of Publication 408, including any subsequent revisions and/or
amendments thereto. The following requirements shall apply to the
base course:
(a)
The base course shall consist of a minimum of
six inches of AASHTO No. 1 crushed stone placed upon an acceptable
rolled subgrade.
(b)
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 wacker.
(c)
No base materials shall be placed upon a wet
or frozen subgrade.
D.
Slope. All streets shall have a minimum slope of 2%
crown as measured from the center line of the street to the edge of
each side of the cartway.
E.
Use of fill material. If fill material is proposed
to be used for the roadway bed, subgrade or any other aspect of the
design and construction of a street, the fill material shall be acceptable
material for such use as determined by the Township Engineer. Placement
of acceptable fill material within three feet of the proposed final
roadway grade shall be in eight-inch loose lifts and compacted to
not less than 97% of the material's dry weight density as determined
by methods prescribed by the Engineer. Placement of acceptable fill
material below three feet of the proposed final roadway grade shall
be in eight-inch loose lifts and compacted to not less than 95% of
the material's dry weight density as determined by methods prescribed
by the Engineer. The type of compacting equipment to be used for such
purposes shall be of sufficient and nature as determined by the Township
Engineer. Use of fill material shall comply with PennDOT specifications
of Section 206 of the most recent edition of Publication 408, including
any subsequent revisions and/or amendments thereto. The regulations
within this section shall apply to the use of fill material within
the any area of the cartway and the shoulder of the roadway.
F.
Slope of embankments. The recommended slope of any
required road embankment shall be three horizontal to one vertical,
but under no circumstances shall the embankment have a slope greater
than two horizontal to one vertical.
G.
Local streets. The minimum pavement structure for
a local street shall be as follows: 1.5 inches of ID-2A wearing course
upon 4.5 inches of BCBC. Applicable construction and design standards
of PennDOT, as contained within Section 400 of the most recent edition
of Publication 408, or the most recent edition of Publication 408,
including any subsequent revisions and/or amendments thereto, shall
apply.
H.
Collector streets. The minimum pavement structure
for a collector street shall be as follows:
(1)
One and one-half inches of ID-2A wearing course upon
five inches of BCBC.
(2)
Applicable construction and design standards of PennDOT,
as contained within Section 400 of the most recent edition of Publication
408, or the most recent edition of Publication 408, including any
subsequent revisions and/or amendments thereto, shall apply.
I.
Arterial streets. The pavement structure for an arterial
street or highway shall be governed by the most recent edition of
PennDOT publication No. 242, Roadway Management Manual, including
any subsequent revisions or amendments. All applicable construction
and design standards of PennDOT, as contained within Section 400 of
the most recent edition of Publication 408, or the most recent edition
of Publication 408, including any subsequent revisions and/or amendments
thereto, shall apply.
J.
Dimensional standards for roads.
|
Dimensions
| |||
|---|---|---|---|
|
Type of Street
|
Right-of-Way
(feet)
|
Cartway
(feet)
|
Shoulder Width
(feet per side)
|
|
Arterial1
|
PennDOT spec2
|
PennDOT spec2
|
PennDOT spec2
|
|
Collector1
|
60
|
24
|
4
|
|
Local1
|
50
|
20
|
2
|
|
NOTES:
| |
|---|---|
|
1
|
Streets containing curbing and sidewalks shall
provide barrier-free ramps in accordance with the drawing attached
as Exhibit A to this chapter.[1]
|
|
2
|
"PennDOT spec" represents governing PennDOT
standards.
|
[1]
Editor's Note: Exhibit A is on file in the Township office.
K.
Limited exemption.
(1)
A subdivision or land development containing not more
than three lots or three detached single-family dwellings units may
be serviced by a private street having a minimum right-of way of not
less than 50 feet. Said right-of-way shall be cleared of all vegetation
and properly graded. The width of the cartway shall be not less than
16 feet and have a base consisting of six inches of acceptable base.
All other design specifications for streets, as set forth in this
chapter, which do not conflict with the above, shall apply.
(2)
Any subdivision or land development qualifying and
wishing to provide a private street, designed as such, shall contain
covenants and/or deed restrictions as a condition of approval, recorded
with the approved plan and addressing the following:
(a)
The street shall remain as a private street,
not subject to offer for public dedication, unless it is improved
to meet or exceed all applicable design standards in effect at the
time such offer is made.
(b)
A maintenance agreement and appropriate provisions
which outline the parties responsible for the continued of the street.
(c)
An agreement with the Township under which elected
officials, appointed officials, representatives and/or employees of
Foster Township are held harmless from any liability related to the
use and safety of a private street, including, but not limited to,
enforcement of the maintenance agreement in relationship to vehicular
access of emergency vehicles.
(d)
Any further proposed development upon the site,
excluding accessory structures, shall result in the development being
classified as a major subdivision or major land development, subject
to all applicable design standards for such in effect at the time
approval is sought for additional development.
The all-applicable regulations contained within
Chapter 441 (Access to and Occupancy of Highways by Driveways and
Local Roads) of Title 67, Transportation, of the Department of Transportation
of Pennsylvania, shall govern all design features of roads and driveways
related to horizontal visibility.
A.
A minimum tangent of 100 feet shall be required between
curves on all classifications of streets.
D.
Clear sight triangles shall be provided at all street
intersections. Within such triangles, no object greater than 2 1/2
feet in height and no other object that would obscure the vision of
the motorist shall be permitted. Such triangles shall be in conformance
with Chapter 441, Title 67, Department of Transportation of Pennsylvania.
A.
A cul-de-sac street will not be approved when a through
street is more advantageous.
B.
Cul-de-sac streets, permanently designed as such,
and/or single access streets shall not exceed 750 feet in length and
furnish access to not more than 10 dwelling units, subject to all
proposed lots being in compliance with the applicable zoning regulations
for the minimum front footage for the zoning district in which the
subdivision is located.
C.
Cul-de-sac streets shall terminate in a circular right-of-way
with a minimum diameter of 120 feet and 100 feet diameter to the outer
pavement edge or curbline.
D.
The paved width of a cul-de-sac shall not be less
than the minimum cartway width for a local street.
E.
The entire area within a cul-de-sac shall be paved.
No physical obstructions shall be permitted within the cul-de-sac,
including, but not limited to, islands, vegetative cover, trees and/or
any other types of decorative features.
F.
No physical obstructions shall be located within six
feet of the edge of the cartway within a cul-de-sac, including, but
not limited to, mailboxes, utility poles, utility transformer boxes
and/or similar above grade obstructions.
G.
Any street which is terminated, with planned future
access to an adjoining property or because of authorized stage development,
shall be provided with a temporary, all-weather turning circle. The
turning circle shall be completely within the boundaries of the subdivision
and/or land development, and the use of the turnaround shall be guaranteed
to the public until such time as the street is extended.
Bridges and other stream crossing structures
which are part of the proposed street system shall be designed and
constructed in accordance with current PennDOT standards and specifications.
Evidence of compliance with and approval of the Division of Dams and
Encroachments, Pennsylvania Department of Environmental Protection,
shall be provided by the developer, if applicable.
A.
Adequate provisions to maintain uninterrupted parallel
drainage along a public street at the point of driveway entry shall
be required. The adequacy of each proposed driveway shall be made
based upon the recommendation of the Township Engineer in relationship
to existing site conditions.
B.
Driveway entrances or aprons within the street right-of-way
shall be surfaced their full width of entrance.
C.
Driveway entrances or aprons shall be stabilized and
maintained by the property owner in a manner to prevent erosion of
driveway material onto any adjoining public right-of-way.
D.
All driveway entrances with access onto a public road
shall be required to secure a highway occupancy permit from either
Foster Township, Luzerne County, or PennDOT prior to construction
and the establishment of same. A deed restriction requiring the owner
or developer of a property as the responsible party to secure the
required highway occupancy permit shall be contained in all deeds.
E.
All driveways shall be designed and constructed in
accordance with all applicable provisions within Chapter 441 (Access
to and Occupancy of Highways by Driveways and Local Roads) of Title
67, Transportation.
A.
All earthmoving activities shall be conducted in such
a way as to prevent accelerated erosion and the resulting sedimentation.
B.
A subdivision and/or land development which includes
any earthmoving activity, as defined in Chapter 102, Erosion Control,
Rules and Regulations of the Department of Environmental Protection,
shall require that a soil erosion and sedimentation plan be prepared
by the developer. The developer shall submit said plan to the Luzerne
County Conservation District for its review, comment and written approval.
C.
The soil erosion and sedimentation control plan and
measures used to control erosion and sedimentation shall meet the
standards and specifications set forth in the Pennsylvania Department
of Environmental Protection Soil Erosion and Sedimentation Control
Manual and Chapter 102 of the Rules and Regulations of the Pennsylvania
Department of Environmental Protection.
D.
Any subdivision and/or land development requiring
the submission of a soil erosion and sedimentation plan shall not
be granted approval, preliminary or final, until the Luzerne County
Conservation District issues written notification that the soil erosion
and sedimentation plan is deemed adequate and/or approved.
E.
Where the earthmoving activity affects 25 acres or
more, the soil erosion and sedimentation control plan must be submitted
to the County Conservation District, together with an application
for an earth disturbance permit. An earth disturbance permit must
be granted by the Pennsylvania Department of Environmental Protection
prior to preliminary approval of a subdivision plan or land development
plan.
Within any proposed major subdivision or major
land development, if the water is to be provided by means other than
by private wells owned and maintained by the individual owners of
the lots within the subdivision or land development, the developer
shall present evidence to the Board of Supervisors that the subdivision
or land development is to be supplied by a certified public utility,
a bona fide cooperative association of lot owners, or by a municipal
corporation, authority or utility. A copy of a certificate of public
convenience from the Pennsylvania Public Utility Commission or an
application for such certificate, a cooperative agreement or a commitment
or agreement to serve the area in question, whichever is appropriate,
shall be acceptable as evidence.
A.
All subdivisions and land developments shall utilize
an approved public distribution system for water supply when such
a system is accessible to the site or is within 1/10 mile of the site
and connection to such is feasible.
B.
The plans for the installation of water lines of a
public water supply shall be prepared by the developer with the cooperation
of the applicable public water company or authority and submitted
with the preliminary plans.
C.
When a subdivision or land development is to be serviced
by a centralized water supply system, fire hydrants shall be installed.
The location and number of fire hydrants shall be determined on a
case-by-case basis. Fire hydrants along any approved street shall
not be more than 500 feet apart and connected to a water main not
less than eight inches in diameter.
D.
All suppliers of water to any proposed subdivision
or land development shall be organized in such a fashion as to fall
within the jurisdiction of the Pennsylvania Public Utility Commission.
One copy of all correspondence, supporting documentation, application
for permits and certificates for operation submitted to the Pennsylvania
Department of Environmental Protection and the Pennsylvania Public
Utility Commission for the right to provide such services shall be
forwarded to the Township as part of the public record. One copy of
the permit and certificate of convenience issued by the Pennsylvania
Department of Environmental Protection and the Pennsylvania Public
Utility Commission authorizing such services shall be forwarded upon
receipt to the Board of Supervisors as part of the public record.
On-lot water systems shall be permitted subject
to their construction in accordance with applicable criteria as set
forth by the Pennsylvania Department of Environmental Protection.
Any subdivision or land development which equals or exceeds 10 lots
or 10 dwelling units and/or exceeds 300 gallons per day shall be required
to submit a groundwater availability and well interference analysis
prepared by a certified hydrogeologist.
All subdivisions and land developments shall
be served with a sewage system (either centralized or on-lot) which
meet or exceed the applicable minimum design standards as set forth
by the Pennsylvania Department of Environmental Protection. All proposed
subdivisions and/or land developments shall require the preparation
and submission of an appropriate sewage planning module to DEP in
accordance with Pennsylvania Code Title 25.
A.
All subdivisions and land developments shall be served
by centralized sewage disposal systems when existing soils conditions
and other environmental features are unsatisfactory for on-lot sewage
or when an existing centralized sewage system is within 1/8 of a mile
from the proposed subdivision or land development and connection to
such is feasible.
B.
All centralized sewage disposal systems shall be compatible
with any sewage feasibility studies and/or the official Township Sewage
Plan, and be approved by the appropriate agencies prior to final plan
approval.
C.
All sanitary sewers shall be designed and constructed
to provide adequate capacity for the ultimate flow of the subject
development plus additional flow as may be projected to be generated
by adjacent properties.
D.
All individual lateral connection shall be installed
to the curb right-of-way line at the time of initial installation
of the system.
E.
All systems classified as sewage services, as defined
in Chapter 71 of the Pennsylvania Department of Environmental Protection
Regulations, shall be designed and constructed in accordance with
regulations and requirements set forth in the Sewage Manual prepared
by the Bureau of Water Quality Management of Department of Environmental
Protection.
A.
On-lot sewage systems, both individual and community sewage systems, shall be designed and constructed in accordance with Pennsylvania Department of Environmental Protection requirements under Title 25, Rules and Regulations, Part 1, Subpart C, Chapter 73, and any amendments thereto.
B.
Prior to approval of preliminary plan, the Township
Sewage Enforcement Officer shall submit a report to the Board of Supervisors
regarding the site and soils investigation and analysis.
C.
All systems utilizing subsurface disposal of sewage
effluent ("community sewage systems," as defined by Chapter 73 of
the Pennsylvania Department of Environmental Protection Regulations)
shall be designed and constructed in accordance with requirements
of the aforesaid Chapter 73. A registered professional engineer employed
by the applicant shall provide written certification that the existing
or proposed facility has adequate capacity to satisfactorily treat
the total projected sewage flow.
D.
A sewage permit must be approved and issued by the
Township Sewage Enforcement Officer prior to the start of any construction
or development upon any lot within an approved subdivision or land
development.
A stormwater management plan shall illustrate
the following information:
A.
Mapping of the watershed area or areas in which the
proposed development is located, including both predevelopment and
post-development areas.
B.
Calculations of all runoff for all points of runoff
concentration, including predevelopment and post-development conditions.
C.
Complete drainage systems for the development. All
existing drainage features which are to be incorporated in the design
shall be so identified. If the development is to be developed in stages,
a drainage plan for the entire development shall be submitted with
the preliminary plan.
D.
A soil erosion and sedimentation control plan shall
be integrated with the stormwater management plan.
E.
Any development, whether proposed initially or cumulatively,
which equals or exceeds 10,000 square feet (combined building and
paving area) shall require the submission of a stormwater management
plan in accordance with the applicable provisions within this section.
F.
A stormwater management plan and a soils erosion and
sedimentation control plan must be approved prior to the start of
any construction or development.
The following items, as applicable, shall be
included upon and/or within the stormwater management plan:
A.
General description of project.
B.
General description of stormwater controls both during
and after development.
C.
Expected project time schedule, including anticipated
start and completion dates.
D.
Training and experience of person(s) preparing the
plan.
E.
A signature block by a registered professional engineer
attesting to the following: "I, __________, have prepared and hereby
certify that the Stormwater Management Plan meets all design standards
and criteria of the Foster Township Subdivision and Land Development
Ordinance."
F.
A location map which provides the location of the
project relative to its geographic proximity to streets highways,
municipal boundaries or similar identifiable features.
G.
Existing contours at intervals of two feet. In areas
of steep slopes (greater than 5%), five-foot contour intervals may
be used.
H.
Streams, lakes, ponds or other bodies of water within
the project area or adjacent to the site which will be affected by
runoff from the project.
I.
Other physical features, including existing drainage
swales and areas of natural vegetation to be preserved.
J.
Location of existing underground utilities, sewers
and water lines.
K.
Location of proposed underground utilities, sewers
and water lines.
L.
Soil types and boundaries.
M.
Proposed changes to land surface and vegetative cover.
N.
Areas to be cut or filled.
O.
Proposed structures, roads, paved areas and buildings.
P.
Final contours at intervals of two feet. In areas
of steep slopes (greater than 5%), five-foot contour intervals may
be used.
Q.
Location of where water will exit the site and the
means for discharging.
Stormwater drainage facilities shall be designed
in accordance with the following provisions:
A.
No stormwater runoff or natural drainage shall be
so diverted as to overload existing drainage systems, or create flooding
or the need for additional drainage structures on other private properties
or public lands, without approved provisions being made by the developer
for properly handling such conditions.
B.
Storm drainage systems shall be designed to convey
through the proposed development the peak runoff that will occur when
all tributary areas upstream are developed to the extent reasonably
projected during the next 25 years. The calculation of this runoff
rate shall take into account the land use and development regulations,
including runoff controls, in effect in the tributary areas.
C.
Where a subdivision or land development is traversed
by a watercourse, a drainage easement shall be provided which substantially
conforms to the line of such watercourse at a width adequate to preserve
the unimpaired flow of natural drainage. Such drainage easement shall
be established on both sides of the watercourse at least 20 feet from
any recognized high-water mark of the watercourse, but in no case
shall said drainage easement be less than 20 feet from the top of
the bank of the watercourse. The terms of the easement shall prohibit
any form of development within any portion of the easement, including
fill material, and activities related to grading or excavation.
D.
Drainage facilities that are located on state highway
rights-of-way shall be approved by the Pennsylvania Department of
Transportation, and a letter indicating such approval shall be directed
to the Township Board of Supervisors.
E.
All streets shall be so designed to provide for the
discharge of surface water from their right-of-way. The slope of the
crown on proposed streets shall be 1/4 inch per foot away from the
center line.
F.
When it can be shown to the satisfaction of the Township
Engineer that, due to topographic conditions, natural drainage swales
on the site cannot adequately provide for drainage, open channels
may be constructed which substantially conform to the line and grade
of such natural drainage swales. Capacities of open channels shall
be calculated using the applicable procedures as contained in the
most recent edition of the Erosion and Sedimentation Control Manual,
as published by the Pennsylvania Department of Environmental Protection.
G.
Whenever storm sewers are required by the Board of
Supervisors, such storm sewers shall be separate from the sanitary
sewer system. Storm sewer facilities shall be provided where the Board
of Supervisors, with the advice of the Township Engineer, determines
that surface drainage facilities are inadequate to prevent excessive
erosion and lot or road maintenance problems.
H.
Storm drainage facilities and appurtenances shall
be so designed and provided as to minimize erosion in watercourse
channels and at all points of discharge.
I.
Energy dissipaters shall be placed at the outlets
of all pipes where flow velocities exceed maximum permitted channel
velocities.
J.
The minimum size diameter of a drainage pipe shall
be 15 inches, unless otherwise approved by the Board of Supervisors,
based upon a recommendation by the Township Engineer. The minimum
value for "v" in pipes shall be based on engineering judgment and
experience. Pressure flow is permitted in storm sewers. The elevation
of the hydraulic gradient shall be at least one foot below ground
level. Pressure heads up to 25 feet can be used with concrete pipe
with rubber gasket joints.
K.
Inlets shall be provided so that surface water is
not carried across or around any intersection, nor for a distance
of more than 600 feet in the gutter. When calculations indicate that
curb capacities are exceeded at a point, no further allowance shall
be made for flow beyond that point, and catch basins shall be used
to intercept flow at that point. Surface water drainage patterns shall
be shown for each and every lot and block. Design of inlets must account
for any bypass flows from upgrade inlets. Capacity calculations for
inlets shall be submitted with the design report.
L.
All stormwater drainage facilities shall be designed
to handle, at minimum, the peak discharges from a ten-year, post-development
storm event. The Board of Supervisors shall have the discretion to
require that certain drainage facilities be designed for peak discharges
which may exceed a ten-year, post-development storm event if so warranted
in the recommendation of the Township Engineer.
M.
Drainage facilities shall be large enough to accommodate
potential runoff from upstream drainage areas, whether inside or outside
the subdivision. The Township Engineer shall give approval to the
necessary size of the facility, based on the provisions of the construction
standards and specifications, assuming conditions of maximum runoff
rate calculated by the applicant and reviewed by the Township Engineer.
The calculation of this runoff rate shall take into account any land
use and development regulations, including runoff controls in effect
in the tributary areas.
N.
The developer's engineer shall also study the effect
of the subdivision on existing downstream drainage facilities outside
the area of the subdivision. Such studies will be subject to review
and approval by the Township Engineer. Authorized Township drainage
studies, together with such other studies as deemed appropriate, shall
serve as a guide to needed improvements. Where it is anticipated that
the additional runoff incident related to the development of the subdivision
will overload an existing downstream drainage facility, the Board
of Supervisors may withhold approval of the development until provisions
are made to correct and/or mitigate potential adverse downstream drainage
conditions.
O.
Any proposed or required storm drainage facilities
or structures located on private property shall require the submission
and approval of a detailed maintenance plan to the Board of Supervisors.
Included within said plan shall be the provision of an annual inspection
of such private storm drainage facilities or structures by the Township.
A written agreement to reimburse the Township for any cost incurred
for such inspections shall be submitted with the required maintenance
plan. Any deficiencies determined as a result of the required inspection
shall be subject to correction within 60 days upon receipt of notification
from the Township.
Required drainage easements shall be provided
in accordance to the following:
A.
Where topography or other conditions are such as to
make impractical the inclusion of drainage facilities within road
rights-of-way, perpetual unobstructed easements 20 feet in width for
such drainage facilities shall be provided across property outside
the road lines and with satisfactory access to the road. A greater
width may be required for proper maintenance as determined by the
Township Engineer. A reduction in the width, when warranted by the
topography and circumstances, will be permitted if approved by the
Board of Supervisors after consulting with the Township Engineer,
but in no case shall the width be less than 15 feet. Easements shall
be indicated on the plat. Drainage easements shall be carried from
the road to a natural watercourse or to other drainage facilities.
B.
When a proposed drainage system will carry water across
private land outside the subdivision, appropriate drainage rights
must be secured and indicated on the plat.
C.
A drainage easement of 20 feet from the recognized
high-water mark of a watercourse shall be provided, but in no case
shall the required drainage easement be less than 20 feet from the
top of the bank of the watercourse.
It shall be the policy of the Board of Supervisors
to discourage areas of extremely poor drainage. Should a developer
wish to overcome drainage problems through the inclusion of stormwater
detention facilities, the following provisions shall apply:
A.
Stormwater detention facilities shall be utilized
whenever the stormwater management plan indicates post-development
runoff rates for each point of discharge exceed the predevelopment
runoff rates.
B.
Stormwater detention facilities shall be designed
to provide that the peak runoff rate at all points of discharge from
the site following the proposed development will not exceed predevelopment
runoff rates.
C.
Detention facilities shall be designed so that they
return to 90% dry conditions within approximately 12 hours after the
termination of the storm, unless the Township Engineer finds that
downstream conditions may warrant other design criteria for stormwater
release.
D.
The developer shall verify that the operation of the
detention facilities will not aggravate potential downstream peaking
conditions.
E.
Emergency overflow facilities shall be provided for
detention facilities to handle runoff in excess of design flows.
F.
If the lands of the proposed development will remain
in common ownership, the developer shall provide written assurances
to the Board of Supervisors that the detention ponds will be properly
maintained. The Board of Supervisors shall hold sole discretion as
to whether such assurances are acceptable for guaranteeing proper
maintenance.
G.
If the lands of the proposed development will be conveyed
to two or more separate owners, the developer shall provide written
assurances to the Board of Supervisors that the detention ponds will
be properly maintained. The Board of Supervisors shall hold sole discretion
as to whether such assurances are acceptable for guaranteeing proper
maintenance.
Storm drainage systems required by this chapter
shall be designed to provide protection from a ten- to 100-year storm
as determined by the Township Engineer.
A.
Stormwater runoff calculations shall be calculated
from methods described in the most recent edition of the Erosion and
Sediment Pollution Control Manual, as prepared by the Pennsylvania
Department of Environmental Protection.
B.
Stormwater control system design calculations shall
be based on methods described in the Erosion and Sediment Pollution
Control Manual.
C.
All inlets and manholes shall be either precast or
poured-in-place concrete. No block construction will be allowed. Inlets
and manholes shall be provided with grade adjustment rings to facilitate
raising or lowering as may be required.
D.
Storm sewers and related piping shall be fully coated
corrugated metal, reinforced concrete, polyethylene, PVC or other
material approved by the Pennsylvania Department of Transportation.
E.
Inlets shall be designed and/or located to prevent
hazardous conditions for vehicles, bicycles or pedestrians. Inlets
shall be provided so that surface water is not carried across or around
any intersection, nor for a distance of more than 600 feet in the
gutter. When calculations indicate that curb capacities are exceeded
at a point, no further allowance shall be made for flow beyond that
point, and basins shall be used to intercept flow at that point.
F.
All detention and retention basins shall be designed
and constructed with silt post detectors.
A.
General. If a proposed subdivision includes land that
is zoned for commercial or industrial purposes, the layout of the
subdivision or land development with respect to such land shall make
such provisions as the Board of Supervisors require.
B.
A nonresidential subdivision or land development shall also be subject to all the requirements if site plan approval set forth in Chapter 255, Zoning. Site plan approval and nonresidential subdivision plan approval may proceed simultaneously at the discretion of the Board of Supervisors. A nonresidential subdivision shall be subject to all the requirements of these regulations as well as such additional standards required by the Board of Supervisors and shall conform to the proposed land use and standards established in the Comprehensive Plan, Official Map and Chapter 255, Zoning.
C.
Standards. In addition to the requirements and standards
in these regulations, which are appropriate to the planning of all
subdivisions, the applicant shall demonstrate to the satisfaction
of the Board of Supervisors that the street, parcel and block pattern
proposed is specifically adapted to the uses anticipated and takes
into account other uses in the vicinity. The following principles
and standards shall be observed:
(1)
Proposed industrial parcels shall be suitable in the
types of industrial or commercial development anticipated.
(2)
Street right-of-way and pavement shall be adequate
to accommodate the type and volume of traffic anticipated to be generated
thereon.
(3)
Special requirements may be imposed by the Board of
Supervisors with respect to street, curb, gutter and sidewalk design
and construction.
(4)
Special requirements may be imposed by the Board of
Supervisors with respect to the installation of public utilities,
including water, sewer and storm drainage.
(5)
Every effort shall be made to protect adjacent residential
areas from potential nuisance from a proposed commercial or industrial
subdivision, including the provision of extra depth in parcels backing
on existing or potential residential development and provisions for
a permanently landscaped buffer strip when necessary.
(6)
Streets carrying nonresidential traffic, especially
truck traffic, shall not normally be extended to the boundaries of
adjacent existing and potential residential areas.
