[Ord. No. 10-2022, 7/20/2022]
1.
The following items shall be included in the SWM site plan:
A.
Requirements from § 22-410 of the Subdivision and Land Development Ordinance, and other applicable ordinances, shall be followed in preparing the SWM site plans.
B.
The municipality shall not approve any SWM site plan that is deficient
in meeting the requirements of this chapter. At its sole discretion
and in accordance with this Part, when a SWM site plan is found to
be deficient, the municipality shall disapprove the submission and
require a resubmission.
D.
The following signature blocks:
(1)
"(Municipal official or designee), on this date (Signature date),
has reviewed and hereby certifies that the SWM site plan meets all
design standards and criteria of the Municipal Ordinance No. (number
assigned to ordinance)."
(2)
Certificate, signed and sealed by a qualified professional,
indicating compliance with the provisions of this chapter: "(Design
Engineer), on this date (Signature date), has reviewed and hereby
certified that the SWM site plan meets all design standards and criteria
of the Borough of Conshohocken Stormwater Management Ordinance."
(3)
"(Owner), on this date (Signature date), acknowledges the stormwater
BMPs and management facilities to be a permanent fixture that can
be altered or removed only after approval by the Borough of Conshohocken
of a revised plan, which shall be applicable to all future landowners."
E.
The SWM site plan shall provide the following information:
(1)
The overall stormwater management concept for the project.
(2)
A determination of site conditions in accordance with the BMP
Manual.4[1] A detailed site evaluation, prepared by a qualified professional,
shall be submitted for projects proposed in areas of carbonate geology
or karst topography, and other environmentally sensitive areas, such
as brownfields.
[1]
Editor's Note: See Part 9, References.
(3)
Stormwater runoff design computations and documentation as specified in this chapter, or as otherwise necessary to demonstrate that the maximum practicable measures have been taken to meet the requirements of this chapter, including the general requirements in § 19-301.
(4)
Expected project time schedule.
(5)
A soil erosion and sediment control plan, where applicable,
as prepared for and submitted to the approval authority.
(6)
The effect of the project (in terms of runoff volumes, water
quality, and peak flows) on surrounding properties and aquatic features
and on any existing stormwater conveyance system that may be affected
by the project.
(7)
Plan and profile drawings of all SWM BMPs, including drainage
structures, pipes, open channels, and swales. Profiles shall be plotted
along with the existing grade, proposed grade, and the hydraulic grade
line information for the system. Profiles shall also include the pipe
size, material, and slope, and the width of the channel or swale bottom,
side slopes, bottom slope, and lining material.
(8)
Locations of existing and proposed on-lot wastewater facilities
and water supply wells.
(9)
The SWM site plan shall include an O&M plan for all existing
and proposed physical stormwater management facilities. This plan
shall address long-term ownership and responsibilities for O&M
as well as schedules and costs for O&M activities.
[Ord. No. 10-2022, 7/20/2022]
2.
The applicant shall be responsible for distributing plans, fees,
and application form to the other appropriate agencies having jurisdiction,
including but not limited to the Montgomery County Conservation District,
Montgomery County Planning Commission, PADEP, U.S. Army Corps of Engineers,
and PennDOT.
[Ord. No. 10-2022, 7/20/2022]
1.
SWM site plans shall be reviewed by the municipality for consistency
with the provisions of this chapter.
2.
The municipality shall 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 shall occur within the time period allowed by the Municipalities
Planning Code[1] (90 days) or as otherwise waived by the applicant. If
a longer notification period is provided by other statute, regulation,
or ordinance, the applicant will be so notified by the municipality.
[1]
Editor's Note: See 53 P.S. § 10101 et seq.
3.
If the municipality disapproves the SWM site plan, the municipality
will state the reasons for the disapproval in writing. The municipality
also may approve the SWM site plan with conditions and, if so, shall
provide the acceptable conditions for approval in writing.
[Ord. No. 10-2022, 7/20/2022]
A modification to a submitted SWM site plan that involves a
change in SWM BMPs or techniques, or that involves the relocation
or redesign of SWM 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 a resubmission of the modified SWM
site plan in accordance with this Part.
[Ord. No. 10-2022, 7/20/2022]
A disapproved SWM site plan may be resubmitted, with the revisions
addressing the municipality's concerns, to the municipality in
accordance with this Part. The applicable review fee must accompany
a resubmission of a disapproved SWM site plan.
[Ord. No. 10-2022, 7/20/2022]
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 three years following the date of approval. The municipality may specify a term of validity shorter than three 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 § 19-407 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 § 19-405 of this chapter.
[Ord. No. 10-2022, 7/20/2022]
1.
The developer shall be responsible for providing as-built plans of
all SWM BMPs included in the approved SWM site plan. The as-built
plans and an explanation of any discrepancies with the construction
plans shall be submitted to the municipality.
2.
At a minimum, the as-built plans shall include: general lot layout,
including location of all structures, other impervious surfaces, and
final grading; plans and profiles showing all pipes with finished
grades; location, length, material, and slope of all storm sewer systems,
wastewater, water, and gas mains; location of all wastewater laterals
and water services; final grading plan for SWM BMPs with design and
as-built volume calculations; invert and top elevations for all sanitary
manholes, storm manholes, inlets, and endwalls; and location and depth
of all public utilities and services, etc. The as-built plans shall
be certified as to their correctness by the preparing surveyor or
engineer. All plans shall be sealed by a surveyor or engineer licensed
in the Commonwealth of Pennsylvania and labeled "AS-BUILT DRAWINGS"
and include the date of preparation and firm name. The as-built submission
shall also include electronic files in PDF and CAD format. The as-built
plans shall be approved by the Borough of Conshohocken prior to the
Borough accepting the improvements and processing the completion certificate.
3.
The as-built submission shall include a certification of completion
signed by a qualified professional verifying that all permanent SWM
BMPs have been constructed according to the approved plans and specifications.
The latitude and longitude coordinates for all permanent SWM BMPs
must also be submitted, at the central location of the BMPs. If any
licensed qualified professionals contributed to the construction plans,
then a licensed qualified professional must sign the completion certificate.
4.
After receipt of the completion certification by the municipality,
the municipality will review the as-built plans and may conduct a
final inspection.
