The SWM site plan shall consist of a general description of
the project, including calculations, maps, and plans. A note on the
maps shall refer to the associated computations and erosion and sediment
(E&S) control plan by title and date. The cover sheet of the computations
and E&S control plan shall refer to the associated maps by title
and date. All SWM site plan materials shall be submitted to the municipality
in a format that is clear, concise, legible, neat, and well organized;
otherwise, the SWM site plan shall not be accepted for review and
shall be returned to the applicant. The following items shall be included
in the SWM site plan:
A.
General.
(1)
General description of the project.
(2)
General description of proposed stormwater management techniques,
including construction specifications of the materials to be used
for stormwater management facilities.
(3)
Complete hydrologic, hydraulic, and structural computations for all
stormwater management facilities.
(4)
An erosion and sediment control plan, including all reviews and letters
of adequacy from the Conservation District.
(5)
A general description of proposed nonpoint source pollution controls.
B.
Maps.
(1)
Prepare an Existing Resource and Site Analysis Map (ERSAM) showing
environmentally sensitive areas, including, but not limited to, steep
slopes, ponds, lakes, streams, wetlands, hydric soils, vernal pools,
stream buffers, floodplains and hydrologic soil groups. Land development,
existing recharge areas, and any other requirements specifically outlined
in the municipal SALDO also shall be included.
(2)
Map(s) of the project area shall be submitted on twenty-four-inch-by-thirty-six-inch
sheets and/or shall be prepared in a form that meets the requirements
for recording at the offices of the Recorder of Deeds of Montgomery
County. If the SALDO has more stringent criteria than this chapter,
then the more stringent criteria shall apply. The contents of the
map(s) shall include, but not be limited to:
(a)
The location of the project relative to highways, municipal
boundaries, or other identifiable landmarks.
(b)
Existing contours at intervals of two feet or less. In areas
of slopes greater than 10%, five-foot contour intervals may be used.
(c)
Existing streams, lakes, ponds, or other waters of the commonwealth
within the project area.
(d)
Other physical features, including flood hazard boundaries,
stream buffers, existing drainage courses, areas of natural vegetation
to be preserved, and the total extent of the upstream area draining
through the site.
(e)
The locations of all existing and proposed utilities, sanitary
sewers, and water lines within 50 feet of property lines.
(f)
A map, which may be done as an overlay, showing soil names and
boundaries.
(g)
Limits of earth disturbance, including the type and amount of
impervious area that is proposed.
(h)
Proposed structures, roads, paved areas, and buildings.
(i)
Final contours at intervals of two feet or less. In areas of
steep slopes (greater than 10%), five-foot contour intervals may be
used.
(j)
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.
(k)
The date of submission.
(l)
A graphic and written scale of one inch equals no more than
50 feet; for tracts of 20 acres or more, the scale shall be one inch
equals no more than 100 feet.
(m)
A North arrow.
(n)
The total tract boundary and size with distances marked to the
nearest foot and bearings to the nearest degree.
(o)
Existing and proposed land use(s).
(p)
A key map showing all existing man-made features beyond the
property boundary that would be affected by the project.
(q)
Location of all open channels.
(r)
Overland drainage patterns and swales.
(s)
A blanket easement for all stormwater management facilities
to provide ingress to and egress from a public right-of-way.
(t)
The location of all erosion and sediment control facilities.
(u)
A note on the plan indicating the location and responsibility
for maintenance of stormwater management facilities that would be
located off site. All off-site facilities shall meet the performance
standards and design criteria specified in this chapter.
(v)
A statement, signed by the applicant, acknowledging that any
revision to the approved drainage plan must be approved by the municipality,
and that a revised erosion and sediment control plan must be submitted
to the municipality or Conservation District for approval.
(w)
The following signature block for the design engineer:
"I, (design engineer), on this date (date of signature), hereby
certify that the drainage plan meets all requirements of the Department
of Environmental Protection's (DEP's) regulations and this chapter."
C.
Supplemental information to be submitted to the municipality.
(1)
The following information shall be submitted by the applicant and
shall include:
(a)
The overall stormwater management concept for the project designed.
(b)
Stormwater runoff computations required by this chapter.
(c)
Stormwater management techniques to be applied both during and
after development.
(d)
Expected project time schedule.
(e)
Development stages or project phases, if so proposed.
(2)
An E&S control plan.
(3)
A description of the effect of the project (in terms of runoff volumes
and peak flows) on adjacent properties and on any existing municipal
stormwater collection system that may receive runoff from the project
site.
(4)
An approved highway occupancy permit from the Pennsylvania Department
of Transportation (PennDOT) District office when drainage towards
PennDOT property is proposed.
D.
Stormwater management facilities.
(1)
All stormwater management facilities must be located on a plan and
described in detail.
(2)
When infiltration measures such as seepage pits, beds, or trenches
are used, the locations of existing and proposed septic tank infiltration
areas and wells must be shown.
(3)
All calculations, assumptions, and criteria used in the design of
the stormwater management facilities must be shown.
The municipality requires submission of a complete SWM site
plan, as specified in this chapter.
A.
Proof of application or documentation of required permit(s) or approvals
for the programs listed below shall be part of the plan:
C.
Any submissions to the agencies listed above that are found to be
incomplete may not be accepted for review and may be returned to the
applicant with a notification, in writing, of the manner in which
the submission is incomplete.
D.
Additional copies shall be submitted as requested by the municipality,
County Conservation District, or DEP.
A.
The SWM site plan must be consistent with this chapter. Any SWM site
plan found incomplete may be returned to the applicant.
B.
The municipality will notify the applicant, in writing, within 45
days, whether the SWM site plan is approved or disapproved. If the
SWM site plan involves a subdivision and land development plan, the
notification period is 90 days. If a longer notification period is
provided by other statute, regulation, or ordinance, the applicant
will be so notified by the municipality. If the municipality disapproves
the SWM site plan, the municipality shall cite the reasons for disapproval
in writing.
C.
For any
SWM Site Plan that proposes to use any BMPs other than green infrastructure
and low-impact development (LID) practices to achieve the volume and
rate controls required under this chapter, the municipality will not
approve the SWM site plan unless it determines that green infrastructure
and LID practices are not practicable.
[Added 8-10-2022 by Ord. No. 2022-05]
D.
The municipality's approval of an SWM site plan authorizes the regulated activities contained in the SWM site plan for a maximum term of validity of five years following the date of approval. The municipality may specify a term of validity shorter than five years in the approval for any specific SWM site plan. Terms of validity shall commence on the date the municipality signs the approval for an SWM site plan. If an approved SWM site plan is not completed according to § 190-27 within the term of validity, then the municipality may consider the SWM site plan disapproved and may revoke any and all permits. SWM site plans that are considered disapproved by the municipality shall be resubmitted in accordance with § 190-17 of this chapter.
[Added 8-10-2022 by Ord. No. 2022-05]
A modification to a submitted SWM site plan that involves a
change in BMPs or techniques, or that involves the relocation or redesign
of BMPs, or that is necessary because soil or other conditions are
not as stated on the SWM site plan as determined by the municipality
shall require modification and resubmission of the SWM site plan in
accordance with this article.
A disapproved SWM site plan may be resubmitted, with the revisions
addressing the municipality's concerns, to the municipality in accordance
with this article. The applicable review fees must accompany a resubmission
of a disapproved SWM site plan.
