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 shall be prepared by a qualified person.
A.
The plan should be clearly and legibly drawn.
B.
If the 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.
C.
Each plan sheet shall be numbered to show the relationship to the total number of sheets in the plan (e.g., Sheet 1 of 5). For projects which are also required to prepare and submit a land development plan in accordance with Chapter 119, Subdivision and Land Development, the SWM site plan may be incorporated into the land development plan.
D.
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.
E.
SWM site plans shall be prepared in a form that meets the requirements
for recording for the office of the Recorder of Deeds for Lancaster
County.
F.
The total development site boundary and size with distances marked
to the nearest foot and bearings to the nearest degree.
The following items shall be included in the SWM site plan:
A.
The date of the SWM site plan and latest revision, graphic scale,
written scale, and North arrow.
B.
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
plan.
C.
The file or project number assigned by the firm that prepared by
the plan.
D.
A statement, signed by the landowner, acknowledging the SWM facilities
to be permanent fixtures that cannot be altered or removed unless
a revised plan is approved by the Township.
F.
For SWM facilities located offsite:
G.
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.
H.
A location map, drawn to a scale of a minimum of one inch equals
2,000 feet, relating the plan to municipal boundaries, at least two
intersections of road center line or other identifiable landmarks.
I.
Existing features.
(1)
In areas of proposed earth disturbance, contours at intervals of
one foot or two feet. In areas of steep slopes (greater than 15%)
and areas undisturbed, five-foot contour intervals may be used. Existing
contours shall be plotted as located by field survey, or by using
GIS or LIDAR data when deemed acceptable by the Township Engineer.
[Amended 4-17-2017 by Ord. No. 312-2017]
(2)
The locations of all existing utilities (including sanitary sewers,
waterlines, on-lot disposal systems and wells), and associated easements.
(3)
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 diameter at breast height, woodlands, other environmentally
sensitive areas and the total extent of the upstream area draining
through the development site.
(4)
Soil names and boundaries.
(5)
All existing man-made features within 200 feet of the development
site boundary.
(6)
All existing stormwater management facilities on the site and a note
identifying any recorded stormwater management agreements affecting
the subject property.
(7)
Names of all adjacent landowners, property boundaries and locations
and dimensions of easements, as located by field survey, or by deed
plotting when deemed acceptable by the Township Engineer.
[Added 4-17-2017 by Ord.
No. 312-2017]
J.
Proposed features.
(1)
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.
(2)
Proposed structures, roads, paved areas, building and other impervious
and semi-impervious areas.
(3)
The location of any proposed on-lot disposal systems, replacement
drainfield easements, and water supply wells.
(4)
A note indicating existing and proposed land use(s).
(5)
Plan and profile drawings of all proposed SWM facilities, including
BMPs, drainage structures, pipes, open channels, and swales.
(6)
Where pervious pavement is to be installed, pavement material and
construction specifications shall be included.
(7)
The location of all existing and proposed easements, including drainage
easements, access easements and riparian corridor easements.
K.
The location of all E&S control facilities.
A.
General description of the development site, including a description
of existing natural and hydrologic features and any environmentally
sensitive areas.
B.
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 for 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.
C.
The effect of the project (in terms of runoff volumes, water quality
and peak flows) on adjacent properties and on any existing municipal
stormwater management facilities that may receive runoff from the
development site.
D.
Complete hydrologic, hydraulic, and structural computations for all
SWM facilities.
E.
Expected project time schedule.
F.
The recorded subdivision and SWM site plans shall include a note indicating the amount of impervious coverage on each lot, measured in square feet, for which the SWM facilities have been designed. For lots intended for development of a single residential dwelling unit, the maximum permitted impervious coverage used for the design shall be the maximum permitted impervious coverage for the zoning district in accordance with Chapter 135, Zoning.
[Amended 9-19-2022 by Ord. No. 338-2022]
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 the Township prior to unconditional SWM site
plan approval.
C.
For any activities that required a DEP joint permit application and
are regulated under Chapter 105, require a PennDOT 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 SWM site plan approval.
