New half or partial streets will not be permitted, but whenever a tract to be subdivided borders an existing recorded half or partial street, the Township shall require the applicant to provide a reservation of land adjacent to such half or partial street adequate to allow the construction of a road meeting the standards of this chapter (refer to §
330-17F).
The following standards shall be the required minimum for all
public and private streets proposed as a part of any new subdivision
or land development. Where a new subdivision or land development fronts
an existing street, additional right-of-way width may be required
if the subdivision or land development will result in any additional
traffic upon that street. Applicants shall not be required to make
up deficient cartway width of an existing street as a condition of
plan approval.
A. All roads, existing and proposed, are classified as "interstate," "arterial," "collector," or "local" roads. Such classifications are based upon their function and are defined in Article
VIII of this chapter.
B. Interstate streets shall be designed and constructed according to
the requirements of the Pennsylvania Department of Transportation;
they are not otherwise regulated by this chapter.
C. For the purposes of this section, the following terms are defined:
LOW-DENSITY
Residential density of 2.0 acres/dwelling unit, or lesser
density, with no individual lot smaller than 1.0 acre. The presence
of nonresidential uses may, at the discretion of the Township, cause
an otherwise low-density area to be deemed a "medium-density" area.
MEDIUM-DENSITY
An area which is more densely developed than a low-density
area but less than a high-density area.
HIGH-DENSITY
Residential density of 0.5 acre/dwelling unit, or more dense,
or development where the median lot width at street line of the proposed
residential lots is 80 feet or less, or where both conditions apply.
D. Right-of-way width.
(1) Service streets (alleys) shall be provided with a right-of-way measuring
at least 12 1/2 feet from the cartway center line to each side.
(2) Marginal-access streets shall be provided with a right-of-way measuring
at least 16 1/2 feet from the cartway center line to each side.
(3) Local roads, including single-access streets, shall be provided with
a right-of-way measuring at least 27 feet from the cartway center
line to each side. The right-of-way shall extend a minimum of 10 feet
past the face of curb or edge of paving, as the case may be, on both
sides of the street.
(4) Arterial streets and collector streets shall be provided with a right-of-way
measuring at least 30 feet from the cartway center line to each side.
The right-of-way shall extend a minimum of 10 feet past the face of
curb or edge of paving, as the case may be, on both sides of the street.
(5) Additional right-of-way and cartway widths may be required by the
Township for the purpose of promoting the public safety and convenience.
(6) All cartways, where possible, shall be centered within the right-of-way.
E. Travel lane width.
(1) Service streets and marginal-access streets may have a single travel
lane. All other streets must have at least two travel lanes.
(2) Travel lanes shall have a minimum paved width of 12 feet. All streets
must provide for parking on both sides.
F. Required width for other lanes.
(1) Where provided, center left-turn lanes shall have a minimum width
of 12 feet.
(2) Where provided, acceleration lanes, deceleration lanes, and right-turn-only
lanes shall have a minimum width of 12 feet. As may be approved by
the Township, such lanes may be reduced to a width of 10 feet along
local roads in any area and along collector streets and major streets
in low-density areas at the discretion of the Township Board of Supervisors
with a recommendation from the Township Planning Commission.
(3) Where a street is designed with a medial planting strip, the street
shall have a minimum paved width of 18 feet between the edge of the
planting strip and the nearest cartway edge, regardless of street
type or location.
G. Requirements for on-street parking.
(1) All on-street parking shall be configured so that vehicles park parallel
to the curb.
(2) Streets that accommodate on-street parking shall have an additional
paved width of at least eight feet along the side of the street where
parking is to be provided.
(3) On-street parking shall be required along both sides of the street
for local streets in medium-density and high-density areas.
(4) On-street parking is permitted, but not required, along either one
side or both sides of the street for:
(a)
Local roads in low-density areas;
(b)
Minor collector streets in medium-density and high-density areas;
and
(c)
Major collector streets in high-density areas.
(5) On-street parking is prohibited for:
(a)
Collector streets in low-density areas; and
(b)
Arterial streets in low-density and medium-density areas.
(6) On-street parking may be required elsewhere at the discretion of
the Township Board of Supervisors, as may be advised by the Planning
Commission, when such parking would be a safe and logical extension
or preservation of an existing on-street parking area.
(7) In no case shall on-street parking spaces be credited toward the
minimum requirements for off-street parking set forth by the Exeter
Township Zoning Ordinance.
H. Curbs. All new streets shall be provided with curbs designed and
constructed in accordance with Township ordinances and standards.
I. Shoulders. Shoulders shall be provided along the frontage of existing
streets within a proposed subdivision or land development and proposed
streets when the Township determines that curbs are not desirable
or practical in accordance with PADOT Publication 70, Guidelines for
the Design of Local Roads and Streets, latest edition.
J. Vertical clearance. Minimum unobstructed vertical clearance over
streets shall be 14 feet six inches.
New half or partial streets shall be prohibited.
The minimum lot size and width requirements are found in the
Township Zoning Ordinance. The minimum lot area requirements found in the Zoning Ordinance shall be increased in accordance with the provisions of §
390-48 of the Zoning Ordinance to protect steep slope areas and may be increased by the Township Planning Commission according to the results of the soil percolation tests required by §
330-15 of this chapter.
See the Exeter Township Stormwater Management Ordinance as amended.
All subdivisions and land developments shall be designed to
meet the requirements of the Township's Zoning Ordinance, except as otherwise provided in this chapter.
All improvements shown on subdivision and land development plans
shall be maintained in perpetuity by the applicant or developer, and
by his heirs and assigns, unless such improvements have been dedicated
to and accepted by the Township.
A water resources study meeting the requirements of this subsection
shall be submitted to the Township unless exempted by the conditions
listed below in Subsection G.
A. The water resource study shall address the following issues:
(1) The dependence of the Township upon groundwater as a source of water
for many uses; and
(2) The preservation of groundwater and surface water resources.
B. The determination of whether a water resources study is needed shall
be made by the Township Planning Commission, with recommendations
from the Township Engineer.
C. The applicant is strongly encouraged to solicit advice from the Berks
County Soil and Conservation District and the Township Engineer in
order to refine the scope of the water resources study prior to commencement.
D. The water resources study shall be prepared by a qualified hydrogeologist
at the expense of the developer.
E. The water resources study shall make determinations and provide supporting
data on the following issues:
(1) The impact of the proposed development on groundwater recharge as
the result of newly created impervious surfaces or modified land cover
conditions. It shall be demonstrated that the post-development groundwater
recharge shall meet the requirements of the Exeter Township Stormwater
Management Ordinance, as amended.
[Amended 5-23-2011 by Ord. No. 711]
(2) The impact of groundwater pumping, when proposed, per Subsection
F(8).
(3) When on-site groundwater pumping is proposed, the capability of a given tract, parcel, or lot to support the continual extraction of groundwater in quantities required for the intended developed use per Subsection
F(8).
(4) The impact of the proposed development upon surface water quality
and quantity, including suitability for human consumption, for recreational
use, and as a habitat for indigenous aquatic life.
F. The following elements shall be considered essential to any water
resources study. Additional elements may be required depending upon
the conditions of the tract in question and the type of development
proposed.
(1) Average rainfall and storm patterns.
(2) An analysis of the soils and geologic conditions on the site to establish
the degree of groundwater recharge occurring prior to the proposed
development.
(3) A pre-development and post-development water budget, specifying the
total volume of water lost to the site as the result of the creation
of new impervious surfaces or of the land cover alteration on the
site. Pumping of groundwater and wastewater disposal methods must
also be evaluated within the water budget.
(4) An estimation of the effects upon the base flow of nearby streams,
with special attention given to critical low-flow periods.
(5) Any special groundwater quality issues.
(6) Any special surface water quality issues, including pollutant loading
analysis using an accepted methodology to address metals/inorganics,
hydrocarbons, suspended solids, nutrients, biological oxygen demand/chemical
oxygen demand, volatile organics, and fecal coliform.
(7) Proposed methods, based in part or whole upon the Pennsylvania Handbook
of Best Management Practices for Developing Areas, to mitigate negative
impacts to water resources as a result of the proposed development
or change to the land use. The benefit of the selected method(s) must
be quantified.
(8) Well withdrawal impact study. When groundwater pumping is proposed, and the development is not exempted per Subsection
G, a well withdrawal impact study shall be submitted by the applicant. The purpose of the well withdrawal impact study is to evaluate the proposed subdivision's or land development's potential impacts on the quantity and quality of the groundwater and surface water resources of the Township and existing wells in the Township. The well withdrawal impact study shall be prepared by a professional hydrogeologist, who shall submit to the Township for approval the scope of the analysis prior to initiation thereof. The well withdrawal impact study shall contain, at a minimum, the following:
(a)
A map indicating the property boundaries of the proposed subdivision
or land development and all existing wells and surface water bodies
located within the radius, specified in this subsection, of the water
withdrawal points of the proposed subdivision or land development.
(b)
The proposed thirty-day average rate and maximum daily rate
of withdrawal from each source and from all sources in total.
(c)
A geologic map indicating the property boundaries of the proposed
subdivision or land development, the location of the proposed water
withdrawal point(s) and the radius, as specified in this subsection,
of the proposed water withdrawal point(s).
(d)
A hydrogeologic analysis of the well withdrawals (tests to be
conducted concurrently at all wells where multiple wells are proposed
for concurrent use) that includes, but is not limited to, the following:
[1]
A constant rate well test for a minimum of 48 hours taken during
a period of no recharge using the proposed maximum day withdrawal
rate for each well. A peak-rate demand pump test may also be required.
The water level against the elapsed time shall be recorded throughout
the forty-eight-hour well test period and appropriately plotted. Additional
information shall include:
[a] Static, pumping and recovery water level measurements
from all observed wells and perennial streams with a sufficient number
of measurements taken to adequately characterize drawdown, recovery
and stream flow.
[b] Date and time of all water level measurements.
[c] Record of pumping rate measured throughout the
test.
[2]
Observations of water levels from any monitoring wells located
on the subdivision or land development property.
[3]
Observations of water levels and pumping rate available from
existing wells within the specified radius. The monitoring wells shall
be representative of the entire area within the required radius. The
radius from the location of the proposed water withdrawal point shall
be as follows:
|
Proposed 30-Day Average Withdrawal Rate
(gallons per day)
|
Radius
(miles)
|
---|
|
2,000 to 10,000
|
0.40
|
|
10,001 to 50,000
|
0.50
|
|
50,001 to 100,000
|
0.75
|
[4]
Well log data for monitoring wells, if available, to identify
significant water-bearing zones. A significant water-bearing zone
is one capable of providing at least 10% of the pump capacity rate.
[5]
Observations of perennial stream levels at points expected to
be impacted by withdrawal.
[6]
An analysis of expected impacts on intended water source uses
caused by continual withdrawals on existing wells, flows of perennial
streams and long-term lowering of the groundwater levels.
[7]
Documentation, based upon historical water table measurements,
of drought condition water table elevation approximating a fifty-year
drought, if available.
[8]
All field notes and observations, including weather conditions
throughout the well test.
[9]
All methods and/or sources used to obtain data and draw conclusions.
(e)
The well withdrawal impact study shall also include an analysis
of the potential for groundwater recharge on the site. A detailed
geologic evaluation of the site shall be performed and, at a minimum,
shall address soil permeability, depth to bedrock, susceptibility
to sinkhole formation and subgrade stability. Where a site is determined
to be suitable for groundwater recharge, the applicant shall demonstrate
that an average daily balance between the amount of groundwater withdrawn
and the amount of groundwater recharged will be achieved. To the extent
that the site is not suitable for groundwater recharge or a water
balance is not achievable, the proposed density or intensity of the
subdivision or land development shall be reduced consistent with attaining
such water balance or a public water supply shall be utilized. All
recharge techniques and/or facilities shall be designed in accordance
with the Pennsylvania Handbook of Best Management Practices for Developing
Areas.
(f)
In addition, any well or group of wells operating as a system
that withdraws an average of more than 10,000 gallons per day, over
a thirty-day period, shall require a Delaware River Basin Commission
groundwater protected area (DRBC GPA) permit. A group of wells not
operating as a system that withdraws an average of more than 10,000
gallons per day, over a thirty-day period, may require a DRBC groundwater
protected area (GPA) permit.
(g)
The Township, with the assistance of the Township Engineer or
designated consultant, shall review the methodology, assumptions,
findings and recommendations of the applicant's hydrogeologist. The
Board of Supervisors may impose additional improvements it deems necessary
to accommodate the impacts of the proposed subdivision or land development.
G. For the following type of development, a water resources study shall not be required, except under any condition specified in Subsection
H below:
(1) Ten or fewer single-family detached residences where each residence
will have an individual on-lot sewage disposal system. Where development
is phased, a study shall be required if the total number of houses
in all phases combined is more than 10.
(2) Multifamily residential structure(s) with a total of 10 or fewer
units. If at least 75% of the tract proposed for development consists
of soils in hydrologic soil groups C and D (as defined by the U.S.
Department of Agriculture Soil Conservation Service in their Technical
Release #55), then no study is required for multifamily residential
structure(s) with a total of 25 or fewer units.
(3) All nonresidential development on tracts of less than one acre.
(4) Nonresidential development on tracts of less than 10 acres where
at least 75% of the tract consists of soils in hydrologic soil groups
C and D, as defined by the U.S. Department of Agriculture Soil Conservation
Service in its Technical Release #55.
H. A water resources study may be required by the Township under any one of the following conditions, regardless of whether or not the proposed development meets the exemption requirements specified in Subsection
G above:
(1) Where the development proposes the creation of extensive areas of
impervious coverage, thereby reducing recharge area and increasing
the total volume of stormwater runoff. An area of impervious coverage
shall be deemed extensive where:
(a)
The area of impervious surface is 85% or more of the maximum
permitted by the applicable zoning district; or
(b)
There is a paved impervious surface over an area equal to or
in excess of 43,560 square feet (one acre).
(2) Where extensive areas of maintained ground cover (e.g., lawn, landscaped
areas, vegetative areas, etc.) are proposed on slopes facing streams
or other surface waters, thereby increasing the potential for non-point
source pollutant loading of such surface waters. An area of maintained
ground shall be deemed extensive where it covers more than two contiguous
acres.
(3) Where water supply will be groundwater from an on-site source and
wastewater will be exported to some off-site stream discharge facility.