A.
The SWM site plan shall consist of a narrative and all applicable
calculations, maps, plans and supplemental information necessary to
demonstrate compliance with this chapter.
B.
All landowners of land included in the SWM site plan shall be required
to execute all applications and final documents.
C.
All SWM site plans and design calculations shall be signed and sealed
by the qualified person responsible for the design.
A.
Drafting standards.
(1)
The SWM site plan should be clearly and legibly drawn.
(2)
If the SWM site plan is prepared in two or more drawing sheets, a
key map showing the location of the sheets and a match line shall
be placed on each sheet.
(3)
Each sheet shall be numbered to show the relationship to the total
number of sheets in the SWM site plan (e.g. Sheet 1 of 5).
(4)
Drawings or maps of the project area shall be drawn at one inch equals
50 feet or larger scale (i.e. one inch equals 40 feet, one inch equals
30 feet, etc.) and shall be submitted on twenty-four-inch-by-thirty-six-inch
sheets.
(5)
SWM site plans shall be prepared in a form that meets the requirements
for recording for the Office of the Recorder of Deeds of Lancaster
County.
(6)
The total development site boundary and size with distances marked
to the nearest foot and bearings to the nearest degree.
(7)
The proposed name or identifying title of the plan.
B.
SWM site plan information. The following items shall be included
in the SWM site plan.
(1)
The date of the SWM site plan and latest revision, graphic scale,
written scale and North arrow.
(2)
The name of the development, the name and address of the owner of
the property, and the name of the individual or firm preparing the
SWM site plan.
(3)
The file or project number assigned by the firm that prepared the
SWM site plan.
(4)
A statement, signed by the landowner, acknowledging the SWM facilities
to be permanent fixtures that cannot be altered or removed unless
a revised SWM site plan is approved by the Township. The stormwater
facility permanence statement shall be included on a plan sheet intended
for recording.
(5)
For SWM facilities located off site:
(6)
A note informing the owner that the Township shall have the right
of entry for the purposes of inspecting all stormwater conveyance,
treatment, or storage facilities.
(7)
A location map, drawn to a scale of a minimum of one inch equals
two thousand feet, relating the plan to municipal boundaries, at least
two intersections of road center line or other identifiable landmarks.
(8)
A note on the plan indicating any area that is not to be offered
for dedication along with the statement that West Donegal Township
is not responsible for maintenance of any area not dedicated to and
accepted for public use, and that no alteration to swales, or basins,
or placement of structures shall be permitted within easements.
(9)
Certificate, signed and sealed by a qualified professional registered
in the Commonwealth of Pennsylvania and qualified to perform such
duties. See form of certificate in Appendix A-7.[1]
[1]
Editor's Note: Said appendix is included as an attachment to this chapter.
(10)
The names of all owners of all immediately adjacent lands, including
those properties located across street rights-of-way.
(11)
Existing features.
(a)
In areas of disturbance, contours at intervals of one or two
feet. In areas of steep slopes (greater than 15%) and areas undisturbed,
five-foot contour intervals may be used.
(b)
The locations of all existing utilities (including on-lot disposal
systems and wells), sanitary sewers, and water lines and associated
easements within 100 feet of the development site boundary.
(c)
Physical features including flood hazard boundaries, wetlands,
sinkholes, streams, lakes, ponds and other water bodies, existing
drainage courses, karst features, areas of native vegetation including
trees greater than six inches in diameter at breast height, woodlands,
other environmentally sensitive areas and the total extent of the
upstream area draining through the development site within 100 feet
of the development site boundary.
(d)
An overlay showing soil names and boundaries.
(e)
All existing man-made features within 100 feet of the development
site boundary.
(12)
Proposed features.
(a)
Changes to the land surface and vegetative cover, including
final proposed contours at intervals of one or two feet in areas of
disturbance. In areas of steep slopes (greater than 15%) and areas
undisturbed, five-foot contour intervals may be used.
(b)
Proposed structures, roads, paved areas, buildings and other
impervious and semi-impervious areas.
(c)
The location of any proposed on-lot disposal systems, replacement
drainfield easements, and water supply wells.
(d)
A note indicating existing and proposed land use(s).
(e)
Plan and profile drawings of all proposed SWM facilities, including
BMPs, drainage structures, pipes, open channels, and swales. This
information shall be of the quality required for construction of all
facilities.
(f)
Where pervious pavement is to be installed, pavement material
and construction specifications shall be included.
(g)
The location of all existing and proposed easements, including
drainage easements, access easements and riparian corridor easements.
(13)
The location of all E&S control facilities and the sequence
of construction.
(14)
The plan shall include a note identifying the number of square
feet of impervious coverage for which the stormwater management facilities
have been designed to accommodate.
C.
Additional information.
(1)
General description of the development site, including a description
of existing natural and hydrologic features and any environmentally
sensitive areas.
(2)
General description of the overall SWM concept for the project, including
a description of permanent SWM techniques, nonstructural BMPs to be
employed and construction specifications of the materials to be used
for structural SWM facilities. The narrative shall include a description
of any treatment trains and how the facilities are meant to function
with each other to manage stormwater runoff.
(3)
The effect of the project (in terms of runoff volumes, water quality
and peak flows) on adjacent properties and on any existing Township
stormwater management facilities that may receive runoff from the
development site.
(4)
Complete hydrologic, hydraulic, and structural computations for all
SWM facilities.
(5)
Expected project time schedule.
A.
Drafting standards.
(1)
The SWM site plan should be clearly and legibly drawn.
(2)
If the SWM site plan is prepared in two or more drawing sheets, a
key map showing the location of the sheets and a match line shall
be placed on each sheet.
(3)
Each sheet shall be numbered to show the relationship to the total
number of sheets in the SWM site plan (e.g. Sheet 1 of 5).
(4)
Drawings or maps of the project area shall be drawn at one inch equals
50 feet or larger scale (i.e. one inch equals 40 feet, one inch equals
30 feet, etc.) and shall be submitted on twenty-four-inch by thirty-six-inch
sheets.
(5)
SWM site plans shall be prepared in a form that meets the requirements
for recording for the Office of the Recorder of Deeds of Lancaster
County.
(6)
The total development site boundary and size with distances marked
to the nearest foot and bearings to the nearest degree.
(7)
The proposed name or identifying title of the plan.
(8)
The plan sheets or sheet index shall clearly indicate which sheets
are to be recorded as part of the project.
B.
SWM site plan information. The following items shall be included
in the SWM site plan:
(1)
The date of the SWM site plan and latest revision, graphic scale,
written scale and North arrow.
(2)
The name of the development, the name and address of the owner of
the property, and the name of the individual or firm preparing the
SWM site plan.
(3)
The file or project number assigned by the firm that prepared the
SWM site plan.
(4)
A statement, signed by the landowner, acknowledging the SWM facilities
to be permanent fixtures that cannot be altered or removed unless
a revised SWM site plan is approved by West Donegal Township. The
stormwater facility permanence statement shall be included on a plan
sheet intended for recording.
(5)
For SWM facilities located off-site,
(6)
A note informing the owner that West Donegal Township shall have
the right of entry for the purposes of inspecting all stormwater conveyance,
treatment, or storage facilities.
(7)
The plan shall include the West Donegal Township SWM Plan Approval
Certificate for the Board of Supervisors as found in Appendix A-7.[1]
[1]
Editor's Note: Said appendix is included as an attachment to this chapter.
(8)
A location map, drawn to a scale of a minimum of one inch equals
2,000 feet, relating the SWM site plan to municipal boundaries, at
least two intersections of road center line or other identifiable
landmarks.
(9)
A note on the plan indicating any area that is not to be offered
for dedication along with the statement that West Donegal Township
is not responsible for maintenance of any area not dedicated to and
accepted for public use, and that no alteration to swales, or basins,
or placement of structures shall be permitted within easements.
(10)
Certificate, signed and sealed by a qualified professional registered
in the Commonwealth of Pennsylvania and qualified to perform such
duties. See form of certificate in Appendix A-7.[2]
[2]
Editor's Note: Said appendix is included as an attachment to this chapter.
(11)
The names of all owners of all immediately adjacent lands, including
those properties located across street rights-of-way.
(12)
Existing features.
(a)
In areas of disturbance, contours at intervals of one or two
feet. In areas of steep slopes (greater than 15%) and areas undisturbed,
five-foot contour intervals may be used.
(b)
The locations of all existing utilities (including on lot disposal
systems and wells), sanitary sewers, and water lines and associated
easements within 200 feet of the development site boundary.
(c)
Physical features including flood hazard boundaries, wetlands,
sinkholes, streams, lakes, ponds and other water bodies, existing,
drainage courses, karst features, areas of native vegetation including
trees greater than six inches in diameter at breast height, woodlands,
other environmentally sensitive areas and the total extent of the
upstream area draining through the development site within 200 feet
of the development site boundary.
(d)
An overlay showing soil names and boundaries.
(e)
All existing man-made features within 200 feet of the development
site boundary.
(13)
Proposed features.
(a)
Changes to the land surface and vegetative cover, including
final proposed contours at intervals of one or two feet in areas of
disturbance. In areas of steep slopes (greater than 15%) and areas
undisturbed, five-foot contour intervals may be used.
(b)
Proposed structures, roads, paved areas, buildings and other
impervious and semi-impervious areas.
(c)
The location of any proposed on-lot disposal systems, replacement
drainfield easements, and water supply wells.
(d)
A note indicating existing and proposed land use(s).
(e)
Plan and profile drawings of all proposed SWM facilities, including
BMPs, drainage structures, pipes, open channels, and swales. This
information shall be of the quality required for construction of all
facilities.
(f)
Where pervious pavement is to be installed, pavement material
and construction specifications shall be included.
(g)
The location of all existing and proposed easements, including
drainage easements, access easements and riparian corridor easements.
(14)
The location of all E&S control facilities and the Sequence
of Construction.
(15)
The plan shall include a note identifying the number of square
feet of impervious coverage for which the stormwater management facilities
have been designed to accommodate.
C.
Additional information.
(1)
General description of the development site, including a description
of existing natural and hydrologic features and any environmentally
sensitive areas.
(2)
General description of the overall SWM concept for the project, including
a description of permanent SWM techniques, nonstructural BMPs to be
employed and construction specifications of the materials to be used
for structural SWM facilities. The narrative shall include a description
of any treatment trains and how the SWM facilities are meant to function
with each other to manage stormwater runoff.
(3)
The effect of the project (in terms of runoff volumes, water quality
and peak flows) on adjacent properties and on any existing municipal
SWM facilities that may receive runoff from the development site.
(4)
Complete hydrologic, hydraulic, and structural computations for all
SWM facilities.
(5)
Expected project time schedule.
A.
In areas of carbonate geology, a detailed geologic evaluation prepared
by a registered professional geologist (PG) must be submitted as part
of the SWM site plan. The report shall include, but not limited to
the following:
B.
An E&S plan, including all approvals, as required by Chapter
102, shall be provided to West Donegal Township prior to unconditional
final plan approval.
C.
Evidence of review and approval of the NPDES permit by appropriate
agencies shall be provided to the Township if the project disturbance
is greater than one acre.
D.
For any activities that require a DEP joint permit application and
are regulated under Chapter 105 or Chapter 106, require a Penn DOT
highway occupancy permit, or require any other permit under applicable
state or federal regulations, the permit(s) shall be part of the SWM
site plan and must be obtained prior to unconditional final plan approval.
F.
A declaration of adequacy/highway occupancy permit from PennDOT when
PennDOT SWM facilities are proposed to be utilized.
G.
An analysis of the effect of the project (in terms of runoff volumes
and peak flows) on adjacent properties and on any existing municipal
stormwater collection systems that may receive runoff from the development
site.
H.
For SWM facilities that would be located off-site, a note on the
SWM site plan referencing a recorded stormwater maintenance agreement
which indicates the location and responsibility for maintenance of
the off-site SWM facilities. All off-site SWM facilities shall meet
the performance standards and design criteria specified in this chapter.
I.
If wetlands are located onsite, a wetlands impact report by a qualified
professional shall be provided to the Township verifying the limits
of any wetlands located within the site or project boundary. Orange
construction fence or an approved equivalent shall be posted around
any wetlands areas determined by wetlands impact report found onsite
during construction. Major and minor stormwater projects shall provide
a wetland investigation study/report to the Township as part of the
application.
