The following principles, standards and requirements
will be applied by the Riverside Borough Planning Commission to evaluating
plans for proposed subdivision or land developments. The standards
and requirements outlined herein shall be considered the minimum standards
and requirements for the promotion of the public health, safety, morals
and general welfare. Where literal compliance with the standards herein
specified is clearly impractical, the Planning Commission may modify
or adjust the standards to permit reasonable utilization of property
while securing substantial conformance with the objectives of this
chapter.
In order to provide more suitable sites for
building and other uses, improve surface drainage, and control erosion,
the following requirements shall be met:
A. Positive drainage. All blocks and lots shall be graded
to provide proper drainage away from buildings and to prevent the
collection of stormwater in pools.
B. Grading and drainage plan. Lot grading shall be of
such design as to carry surface waters to the nearest practical street,
storm drain, or natural watercourse. The swales shall be sodded, planted
or lined as required. A grading and drainage plan shall be required
for all subdivisions and land developments.
C. Excavations. No final grading shall be permitted with
a cut face steeper in slope than two horizontal to one vertical except
under one or more of the following conditions:
(1) The material in which the excavation is made is sufficiently
stable to sustain a slope of steeper than two horizontal to one vertical.
(2) A written statement is provided by a civil engineer,
licensed by the Commonwealth of Pennsylvania and experienced in erosion
control, certifying that he has inspected the site and that the deviation
from the slope specified above will not result in injury to persons
or damage to property. This statement shall be submitted to and approved
by the Borough Engineer.
(3) A concrete, stone or masonry wall or other permanent
structure is constructed according to sound engineering standards
to support the face of the excavation. Construction plans for such
a wall shall be submitted to and approved by the Borough Engineer.
D. Fills. No final grading shall be permitted which creates
any exposed surface steeper in slope than two horizontal to one vertical
except under one or more of the following conditions:
(1) The fill is located so that settlement, sliding or
erosion will not result in property damage or be hazardous to adjoining
property, streets, alleys, or buildings. Class II and Class III wastes,
as defined in Chapter 75 of the Pennsylvania Department of Environmental
Protection (DEP) Rules and Regulations, latest edition, shall not
be used as fill.
(2) A written statement is provided by a civil engineer,
licensed by Commonwealth of Pennsylvania and experienced in erosion
control, certifying that he has inspected the site and that the deviation
from the slope specified above will not result in injury to persons
or damage to property. This statement shall be submitted to and approved
by the Borough Engineer.
(3) A concrete, stone or masonry wall or other permanent
structure is constructed according to sound engineering standards
to support the face of the fill. Construction plans for such a wall
shall be submitted to and approved by the Borough Engineer.
E. Distance of slope edge from property and right-of-way
lines. The top or bottom edge of slopes shall be a minimum of three
feet from property or right-of-way lines in order to permit the normal
rounding of the edge without encroaching on the abutting property.
All property lines where walls are five feet or more in height or
where slopes are steeper than one horizontal to one vertical may be
required to be fenced at the top of the wall or slope in order to
prevent people from failing off. Such fence, when required, shall
be no less than three feet in height and shall be approved by the
Borough Engineer.
F. Debris and nuisances. All lots shall be kept free
of any debris or nuisance whatsoever.
The minimization of erosion and control of sedimentation
in connection with land development and major subdivisions are in
the public interest, affecting the health, safety, and welfare of
the public, and therefore, these regulations governing erosion and
sedimentation are necessary for the Borough:
A. General standards.
(1) Erosion and sedimentation control plan required. No
changes shall be made in the contour of the land, and no grading,
excavating, removal or destruction to the topsoil, trees or other
vegetative cover of the land shall be commenced until such time that
a plan for minimizing erosion and sedimentation has been processed
with and reviewed by the Borough Engineer and/or the County Soil and
Water Conservation District, or there has been a determination by
the above entities that such plans are not necessary.
(2) Approval and financial security for plan. No subdivision
or land development plan shall be approved unless there has been an
erosion and sedimentation control plan approved by the Borough that
provides for minimizing erosion and sedimentation consistent with
this section, and an improvement bond or other form of financial security
is deposited with the Borough in the form of an escrow guarantee which
will ensure installation and completion of the required improvements,
or there has been a determination by the Borough that a plan for minimizing
erosion and sedimentation is not necessary.
(3) Minimum requirements of County Soil and Water Conservation
District to be met. Where not specified in this chapter, measures
used to control erosion and reduce sedimentation shall as a minimum
meet the standards and specifications of the County Soil and Water
Conservation District. The Borough Engineer, or other officials as
designated, shall ensure compliance with the appropriate specifications,
copies of which are available from the Soil and Water Conservation
District.
B. Specific standards. The following measures are effective
in minimizing erosion and sedimentation and shall be included where
applicable in the control plan:
(1) Stripping. Stripping of vegetation, regrading, or
other development shall be done in such a way as to minimize accelerated
erosion.
(2) Natural features. Development plans shall preserve
salient natural features, keep cut and fill operations to a minimum,
and ensure conformity with topography so as to create the least erosion
potential and adequately handle the volume and velocity of surface
water runoff.
(3) Natural vegetation. Whenever feasible, natural vegetation
shall be retained, protected, and supplemented.
(4) Disturbed areas. The disturbed area and the duration
of exposure shall be kept to a practical minimum.
(5) Stabilization. Disturbed soils shall be stabilized
as quickly as practicable.
(6) Temporary vegetation and mulching. Temporary vegetation
and/or mulching shall be used to protect exposed critical areas during
development.
(7) Permanent vegetation and measures. The permanent final
vegetation and structural erosion control and drainage measures shall
be installed as soon as practical in the development.
(8) Accommodation of increased runoff. Provisions shall
be made to effectively accommodate the increased runoff caused by
changed soil and surface conditions during and after development.
Where necessary, the rate of surface water runoff shall be structurally
retarded.
(9) Containment of sedimentation. Sediment in the runoff
water shall be trapped until the disturbed area is stabilized by the
use of debris basins, sediment basins, silt traps, or similar measures.
C. Grading for erosion and other environmental controls.
In order to provide suitable sites for building and other uses, improve
surface drainage, and control erosion, the following requirements
shall be met:
(1) Street improvements. Streets shall be improved to a mud-free or otherwise permanently passable condition as one of the first items of work done on a subdivision or development. The wearing surface shall be installed in accordance with §
250-35 and as approved by the Borough Engineer.
(2) Cuts and fills. Provisions shall be made to prevent
surface water from damaging the cut face of excavations or the sloping
surfaces of fills by the installation of temporary or permanent drainage
across or above these areas.
(3) Compaction of fills. Fill shall be placed and compacted
so as to minimize sliding or erosion of the soil.
(4) Fills near watercourses. Fills placed adjacent to
watercourses shall have suitable protection against erosion during
periods of flooding.
(5) Dust control. During grading operations, necessary
measures for dust control shall be exercised.
(6) Stream crossings. Grading equipment will not be allowed
to enter into flowing streams. Provisions shall be made for the installation
of temporary or permanent culverts or bridges.
D. Responsibility.
(1) Sedimentation damage. Whenever sedimentation damage
is caused by stripping vegetation, grading or other development, it
shall be the responsibility of the land developer, subdivider, contractor,
person, corporation, or other entity causing such sedimentation to
remove it from all adjoining surfaces, drainage systems and watercourses
and to repair any damage, at his expense, as quickly as possible.
(2) Maintenance of control facilities. Maintenance of
all erosion and sedimentation control facilities during the construction
and development period shall be the responsibility of the land developer
or subdivider.
(3) Maintenance of watercourses. It shall be the responsibility
of the developer, subdivider, person, corporation, or other entity
doing any act on or across a communal stream, watercourse, or swale,
or upon the floodplain or right-of-way, to maintain as nearly as possible
in its present state the stream, watercourse, swale, floodplain or
right-of-way during the pendency of the activity and to return it
to its original or equal condition after such activity is completed.
(4) Installation of improvements. The subdivider or land
developer shall provide and install, at his expense, in accordance
with Borough requirements, all drainage and erosion control improvements
(temporary and permanent) shown on the erosion and sedimentation control
plan.
E. Compliance with regulations and procedures.
(1) Compliance a condition of preliminary plan approval. The Borough, in its consideration of all preliminary plans of subdivision and land development, shall condition its approval upon the execution of erosion and sedimentation control measures as contained in Subsections
B and
C above.
(2) Compliance with requirements of County Soil and Water
Conservation District. The installation and design of the required
erosion and sedimentation control measures shall be in accordance
with standards and specifications of the County Soil and Water Conservation
District.
(3) Compliance with requirements of Pennsylvania Department
of Environmental Protection. Stream channel construction on watersheds
with drainage areas in excess of 1/2 square mile or in those cases
where downstream hazards exist shall conform to criteria established
by the Pennsylvania Department of Environmental Protection.
Any landowner and any person engaged in the
alteration or development of land which may affect stormwater runoff
characteristics shall implement such measures consistent with the
provisions of the applicable watershed stormwater plan as are reasonably
necessary to prevent injury to health, safety or other property, including
measures either to assure that the maximum rate of stormwater runoff
is no greater after development than prior to development activities
or to manage the quantity, velocity and direction of resulting stormwater
runoff in a manner which otherwise adequately protects health and
property from possible injury.
A. Calculating stormwater runoff. The general criteria
for calculating stormwater runoff shall include the following:
(1) Point of evaluation. The point of evaluation shall
be the point at which the stormwater leaves the development site.
The Borough Engineer may require additional points of evaluation beyond
the development site as he deems necessary.
(2) Method of computation. The acceptable methods of computation
shall be those that are contained in the publication "Recommended
Hydraulic Procedures for Computing Urban Runoff from Small Water Sheds
in Pennsylvania." The limitations of each method are defined in this
publication. The same method of computation shall be used for both
predevelopment and post-development calculations.
(3) Rainfall frequency data. Rainfall frequency data are
available from the United States Department of Commerce, Weather Bureau,
and from the Pennsylvania Department of Environmental Protection,
Research Publication No. 70.
(4) Design storms.
(a)
All stormwater retention/detention facilities
shall be designed on the basis of providing adequate control for all
storms of a twenty-four-hour duration and for frequencies of two,
10, 25, and 50 years. The maximum release rate shall be equivalent
to the predevelopment condition for each frequency.
(b)
Storm sewer systems shall be designed to handle
the peak rate of runoff from a storm of a ten-year frequency. This
design shall be used for building drains and local streets.
(c)
Culverts shall be sized for the following classes
of roads and storm frequencies: secondary (collector) roads for storms
of a ten-year frequency; primary (arterial) highways for storms of
a twenty-five-year frequency; and expressways for storms of a fifty-year
frequency.
(d)
Greater design frequencies may be imposed on
individual projects if deemed necessary for particular uses of land
by the Borough Engineer.
(e)
Where state or federal laws impose a greater
design frequency, they shall prevail.
B. Methods of stormwater runoff detention and control.
(1) The following is a listing of detention and control
methods which may be utilized in stormwater management systems, if
appropriate. The choice of control techniques is not limited to the
ones appearing on this list. All state and federal regulations must
be followed in the use of any control method.
(d)
Parking lot and street ponding.
(e)
Seepage pits, seepage trenches or other infiltration
structures.
(f)
Porous pavement and concrete lattice block surfaces.
(g)
Grassed channels and vegetative strips.
(h)
Cisterns and underground reservoirs.
(j)
Decreased impervious area coverage.
(2) The use of other control methods which meet the criteria
in this section shall be permitted if approved by the Borough Engineer.
Various combinations of methods should be tailored to suit the particular
requirements of the type of development and topographic features of
the project area.
C. Design of control methods. The following publications
should be consulted as an aid in designing control facilities:
(1) Chapter 105, Water Obstructions and Encroachments,
Title 25, Rules and Regulations of the Pennsylvania Department of
Environmental Protection.
(2) Guidelines for Stormwater Management, Pennsylvania
Department of Environmental Protection, Bureau of Dams and Waterways
Management.
(3) Urban Hydrology for Small Watersheds, Technical Release
No. 55, United States Department of Agriculture, Natural Resources
Conservation Service, current edition.
D. Stormwater management plan required. No changes shall
be made in the contour of the land, and no grading, excavating, removal
or destruction to the topsoil, trees or other vegetative cover of
the land shall be commenced, until such time that a plan for managing
stormwater runoff has been processed with and reviewed by the Borough
Engineer and/or the County Soil and Water Conservation District, or
there has been a determination by the above entities that such plans
are not necessary. The stormwater management plan and the erosion
and sedimentation control plan may be combined.
(1) Stormwater management controls. The plan shall show
the location and description of permanent control measures and facilities
to be provided at the site, including:
(a)
Permanent vegetation or other soil stabilization
measures;
(b)
Infiltration facilities, such as seepage pits,
beds, or trenches for groundwater recharge; the location of septic
tank infiltration areas and wells relative to these facilities;
(c)
Other control devices or methods, such as rooftop
storage, semipervious paving materials, grass swales, parking lot
ponding, vegetated strips, detention or retention ponds, drainage
easements, storm sewers, culverts, etc.;
(d)
Details on the types, locations and dimensions
of facilities for stormwater detention and conveyance and for groundwater
recharge;
(e)
Details on the maintenance of controls.
(2) Hydrologic calculations. As an attachment to the plan, hydrologic calculations shall be provided for stormwater flows from the site and from the entire area tributary to the site under conditions existing prior to development and resulting from the proposed development. Hydrologic calculations, assumptions and criteria used in the design of stormwater control devices or methods shall also be provided. Measurements shall be in cubic feet per second for the design storms identified in Subsection
A(4) of this section.
(3) Approval and financial security for plan. No subdivision or land development plan shall be approved unless there has been a stormwater management plan approved by the Borough that provides for controlling stormwater runoff consistent with this section, and an improvement bond or other form of financial security is deposited with the Borough in the form of an escrow guarantee which will ensure the installation and completion of required improvements, or there has been a determination by the Borough that a plan for minimizing stormwater runoff is not necessary. (See Article
IV.)
E. Stormwater drainage. Storm sewers, culverts, drainage
easements and related measures shall be provided so as to control
drainage and shall be included where applicable in the management
plan.
(1) Storm sewers. Storm sewers shall be required when
the stormwater runoff cannot be satisfactorily handled within the
street cartway in the determination of the Borough Engineer. Where
existing storm sewers are accessible, proposed subdivisions and land
developments shall be required to connect to them. Where storm sewers
are to be located in undedicated land, they shall be placed in an
easement at least 20 feet wide.
(2) Street drainage at intersections. Stormwater shall
not be permitted to cross intersections or the crown of a street.
Inlets shall be provided along a street at intervals no greater than
600 feet. Inlets shall be designed to PennDOT specifications, Type
C or M. Inlet tops shall be cast-in-place reinforced concrete or precast
concrete. Culvert ends shall be provided with either reinforced concrete
headwalls or pipe end sections. Minimum pipe size shall be 15 inches
in diameter and shall be made of reinforced concrete. When material
for storm drain systems is not specified, the specifications of the
Pennsylvania Department of Transportation shall govern.
(3) Natural drainageways.
(a)
Where a subdivision or land development is traversed
by a natural watercourse, a drainage easement shall be provided conforming
substantially with the line of such watercourse. The width of such
easement shall be at least 30 feet, measuring 15 feet on each side,
or of such additional width as will be adequate to preserve the unimpeded
flow of natural drainage.
(b)
No person, corporation, or other entity shall
block, impede the flow of, alter, construct any structure, or deposit
any material or thing, or commit any act which will affect normal
or flood flow in any communal stream or watercourse without having
obtained prior approval from the Pennsylvania Department of Environmental
Protection or the Borough, whichever is applicable. The Borough shall
assure that all permanent streams not under the jurisdiction of other
official agencies are maintained open and free-flowing.
(4) Roof drains. Stormwater roof drains shall not discharge
water directly onto streets and sidewalks.
(5) Springs and sump pump discharges. Springs and sump
pumps shall not discharge water directly onto streets and sidewalks.
(6) Footer drains, floor drains, and downspouts. Stabilized
outlets shall be provided for footer drains, floor drains, and downspouts.
House footer drains shall be designed to discharge above the design
water surface of the drainageway receiving the flow.
(7) Lot drainage. Lots shall be laid out and graded to
provide positive drainage away from new and existing buildings.
(8) Drainage onto adjacent properties. Special consideration
shall be given in the design of storm drainage facilities so as to
prevent excess runoff onto adjacent properties. Whenever a subdivision
or land development disposes stormwater runoff to an adjacent property
not within a natural watercourse or in a manner which exceeds the
capacity of the watercourse, approval shall be obtained from the affected
property owner, in writing, and a copy submitted with the preliminary
plan.
F. Compliance with regulations and procedures; compliance a condition of preliminary plan approval. The Borough, in its consideration of all preliminary plans of subdivision and land development, shall condition its approval upon the execution of stormwater management control measures as contained in Subsections
D and
E of this section.
See Chapter
163, Floodplain Management, of the Code of the Borough of Riverside.
Easements shall be provided for all utilities,
including but not limited to poles, wires, conduits, storm and sanitary
sewers, water and heat mains, gas, electric power, telephone, and
cable TV.
A. Location and width. With the exception of on-site
sewer laterals, utilities shall be located either within the public
right-of-way or in easements centered on or adjacent to rear or side
lot lines. No structures or trees shall be placed within such easements.
Such easements shall be a minimum of 20 feet in width.
B. Underground installation. In developments of five
or more lots, electric, telephone, and all other utilities shall be
installed underground, with such exceptions as listed below. All existing
and proposed utilities shall be shown on the preliminary plan. Prior
to final plan approval the developer shall be required to obtain a
letter from each utility company providing service to the subdivision
stating that it has entered into an agreement with the developer to
provide for an underground system in accordance with the regulations
of the Pennsylvania Public Utility Commission or that a waiver has
been obtained from the Pennsylvania Public Utility Commission to allow
an overhead system.
C. Petroleum, gas and electric transmission lines. Where
any petroleum, petroleum products, natural gas or electric transmission
line traverses a subdivision or land development, the developer shall
confer with the applicable transmission or distribution company to
determine the minimum distance which the company requires between
each structure and the center line of such transmission line. Prior
to final plan approval, the developer shall be required to obtain
a letter from the transmission or distribution company stating that
it has entered into an agreement with the developer establishing an
easement through the tract and stating any conditions on the use of
the tract and the easement width.
In order to promote the highest environmental
quality possible, the degree to which the developer of a subdivision
or land development plans to preserve existing salient natural features
and landforms intrinsic to the site shall be assessed. Such features
and forms may include trees, wooded areas, and watercourses, among
other items.
A. Tree preservation. Whenever possible, trees shall
not be removed unless they are located within the proposed street
cartway, within the proposed building area, or within utility locations
and equipment access areas. In areas where trees are retained, the
original grade level shall be maintained, if possible, so as not to
disturb the trees.
B. Open space. Where the developer is offering for dedication
or is required by ordinance to establish a reservation of open space
or preserve an area of scenic or historic importance, a "limit of
work" designation, which will confine excavation, earthmoving procedures
and other changes to the landscape, may be required to ensure preservation
and prevent despoliation of the character of the area in open space.
C. Topsoil preservation. All of the topsoil from areas
where cuts and fills have been made shall be stockpiled and redistributed
uniformly after grading. All areas of the site shall be stabilized
by seeding or planting on slopes of less than 10% and shall be stabilized
by sodding on slopes of 10% or more and planted in ground cover on
slopes of 20% or greater.
D. Watercourse protection. Where a subdivision or land development is traversed by a natural watercourse, there shall be provided a drainage easement conforming substantially with the line of such watercourse and of such width as will be adequate to preserve natural drainage. Such easement shall be in addition to the open space requirement of Subsection
B above.
E. Preserved landscaping. When there is a conscientious
effort to preserve the existing natural integrity and character of
a site and where such preservation contains woodlands and trees comparable
to required planting improvements, i.e., landscaping and buffer screening,
the plan may be accepted in lieu of additional landscaping requirements.
F. Landscaping. For all multifamily, apartment, office,
commercial, and industrial subdivisions and land developments, a landscaping
plan shall be provided and shall include efficient plantings for the
required open space, planting strips, screenings, formal gardens,
shade trees, and natural barriers.
G. Buffer planting requirements. Buffer area requirements shall be as specified in Chapter
285, Zoning, of the Code of the Borough of Riverside.
H. Street trees.
(1) The subdivider or developer shall seed the planting
strip between the curb and sidewalk, if either or both are required,
and, in addition, provide street trees of a caliper of not less than
1 1/2 inches and planted a maximum of 50 feet apart.
(2) The type of tree shall be approved by the Planning
Commission upon recommendation of the Borough Engineer. The following
is a list of acceptable trees. Any tree not on this list shall be
specifically noted as not being on the list with reasons given for
the substitution.
(n)
Littleleaf European linden.
In reviewing subdivision and land development
plans, the Borough will consider the adequacy of existing or proposed
community facilities to serve the additional dwellings proposed. Developers
shall give consideration to the desirability of providing or reserving
areas for facilities shown in the Comprehensive Plan and normally
required in residential areas, including churches, fire halls, schools,
and other public and semipublic uses, and parks, playgrounds and playfields.
A. Recreation facilities. Every proposed residential
subdivision or land development to accommodate 25 or more dwelling
units may be required to provide open space for the common recreational
use of the residents thereof. If such land is to be offered for dedication
and accepted by the Borough, the Borough or other public agency shall
acquire the recreational facility. Such area shall be shown and marked
on the preliminary plan as reserved for park and/or recreation purposes.
The recreational facility shall be designed in accordance with the
following standards:
(1) The land shall be of suitable size, dimensions, topography,
and general character for the type of recreational facility proposed.
(2) The amount of such land shall equal at least 0.02
acres for each dwelling unit to be established in the subdivision
or land development; provided, however, that in no case shall the
site be less than one acre.
(3) Such recreational space shall be easily and safely
accessible to all areas of the subdivision or land development and
shall be free of hazards to health and safety.
(4) Such land shall be developed with the facilities proposed, and such improvements shall be included in the performance bond or other financial security if not to be completed before final plan approval. (See Article
IV.)
(5) The developer shall make adequate provision for the
perpetuation and grounds maintenance of such recreation areas not
offered for dedication and shall provide evidence of such provision.
B. Other facilities. Whenever a tract to be subdivided
or developed includes a site for a school or other public use, as
indicated on the Community Facilities Plan or Official Map of the
Borough, such site shall be incorporated into the preliminary plan
by the developer.
(1) Referral to appropriate public agency. The Planning
Commission shall refer the preliminary plan to the appropriate public
agency involved with the acquisition of such site for a determination
of the agency's intent to acquire the proposed site or an alternative
site. Upon receipt of an affirmative report from such agency, the
Planning Commission shall notify the property owner and shall designate
on the preliminary and final plans the site to be acquired by the
public agency.
(2) Land reservation and acquisition. Where sites are
identified for eventual public acquisition in an Official Map Ordinance
or an adopted Comprehensive Plan, no subdivision, building or developing
of the site shall be permitted for a period of 12 months after the
owner of such property has submitted a written notice to the Council
announcing his intentions to build, subdivide or otherwise develop
the land covered by the reservation, or has made formal application
for an official permit to build a structure for private use, unless
the Council or other public agency shall have acquired the property
or begun condemnation proceedings to acquire such property before
the end of the twelve-month period or unless the landowner has consented,
in writing, to an extension of time.