The following items shall be included in the SWM site plan and
report:
A.
Appropriate sections from Chapter 350, Subdivision and Land Development, and other applicable local ordinances, shall be followed in preparing the SWM site plans. In instances where the municipality lacks subdivision and land development regulations, the content of SWM site plans shall follow the county's subdivision and land development ordinance.
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 article, when a SWM site plan is found
to be deficient, the municipality may either disapprove the submission
and require a resubmission, or in the case of minor deficiencies,
the municipality may accept submission of modifications.
C.
Provisions for permanent access or maintenance easements for all physical SWM BMPs, such as ponds and infiltration structures, as necessary to implement the operation and maintenance (O&M) plan discussed in Subsection E(2)(p), below.
D.
The following signature blocks for the municipality, landowner, and
qualified professional preparing the plans:
(1)
"(Municipal official or designee), on this date (date of signature),
has reviewed and hereby certifies that the SWM site plan meets all
design standards and criteria of the Municipal Ordinance No. (number
assigned to the ordinance).
This certification is based entirely on the certifications by
the Engineer for the applicant and this municipal certification shall
place no liability on the municipality or the municipal engineer herein
involved."
(2)
A statement, signed by the landowner, acknowledging that the stormwater
BMPs are fixtures that cannot be altered or removed without prior
approval by the municipality.
(3)
"I, (Qualified Professional), on this date (date of signature), hereby
certify that the SWM site plan meets all design standards and criteria
of the Municipal Ordinance No. (number assigned to the ordinance)."
E.
The SWM site plan shall provide the following information:
(1)
General format. The stormwater plan shall be drawn on sheets no larger
than 24 inches by 36 inches with a graphic scale of not less than
one inch equals 200 feet. All sheets shall contain a title block with
name and address of applicant and engineer, scale, North arrow, legend,
date of preparation and date(s) of any subsequent revisions.
(2)
Existing and proposed features. The plan shall show the following
under both predevelopment and postdevelopment conditions:
(a)
A determination of site conditions in accordance with the BMP
Manual1. A detailed site evaluation shall
be completed for projects proposed in areas of carbonate geology or
karst topography, and other environmentally sensitive areas, such
as brownfields.
(b)
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 recommendations and general requirements in § 338-10.
(c)
Expected project time schedule.
(d)
Watershed location. Provide a key map showing the location of
the development site within the watershed(s) and watershed subarea(s).
On all site drawings, show the boundaries of the watershed(s) and
subarea(s) as they are located on the development site and identify
watershed names(s) and subarea number(s).
(e)
Floodplain boundaries. Identify one-hundred-year floodplains
on the development site (as appropriate) based on the FEMA Flood Study
maps.
(f)
Natural features. Show all bodies of water (natural or artificial),
watercourses (permanent and intermittent), swales, wetlands and other
natural drainage courses on the development site, or which will be
affected by runoff from the development.
(g)
Soils. Provide an overlay showing soil types and boundaries
within the development site with identification of the Hydraulic Soil
Group classification (consult the Conservation District, NRCS and
U.S. Geological Survey for information).
(h)
Contours. Show existing and final contours at intervals of two
feet; in areas with slopes greater than 15%, five-foot contour intervals
may be used.
(i)
Land cover. Show existing and final land cover classifications
as necessary to support and illustrate the runoff calculations performed.
(j)
Drainage area delineations. Show the boundaries of the drainage
areas employed in the runoff calculations performed.
(k)
Stormwater management controls. Show any existing stormwater
management or drainage controls and/or structures, such as storm sewers,
swales, culverts, etc., which are located on the development site,
or which are located off site but will be affected by runoff from
the development.
(l)
A soil erosion and sediment control plan, where applicable,
as prepared for and submitted to the approval authority.
(m)
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.
(n)
Plan and profile drawings and construction details of all SWM
BMPs, including drainage structures, pipes, open channels, and swales.
(o)
SWM site plan shall show the locations of existing and proposed
on-lot wastewater facilities and water supply wells.
(p)
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.
(q)
Easements, rights-of-way, deed restrictions. All existing and
proposed easements and rights-of-way for drainage and/or access to
stormwater control facilities shall be shown along with any areas
subject to special deed restrictions relative to or affecting stormwater
management on the development site.
F.
The SWM site report shall provide the following information (but
not limited to):
(1)
The name of the development, name and location address of the property
site, name, address, and telephone number of the applicant/owner of
the property, and name, address, telephone number, e-mail address,
and engineering seal of the individual preparing the SWM site report.
(2)
Project description narrative, including expected project time schedule.
(3)
Location map showing the project site.
(4)
Drainage area maps for all watersheds and inlets depicting the time
of concentration paths.
(5)
A detailed description of the existing site conditions.
(6)
Complete hydrologic, hydraulic, and structural computations, calculations,
assumptions, and criteria for the design of all stormwater BMPs.
(7)
Description of, justification, and actual field results for infiltration
testing with respect to type of test and test location for the design
of infiltration BMPs.
(8)
Calculations showing the total drainage area and impervious area
loading rates to each BMP.
(9)
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 municipal stormwater collection system that may receive
runoff from the project site.
(10)
Description of the proposed changes to the land surface and
vegetative cover, including the type and amount of impervious area
to be added.
(11)
All applicable worksheets from Chapter 8 of the BMP Manual when establishing volume controls and water quality compliance.
(12)
Identification of short-term and long-term ownership, operation,
and maintenance responsibilities as well as schedules and costs for
inspection and maintenance activities for each permanent stormwater
or drainage BMP, including provisions for permanent access or maintenance
easements.
A.
SWM site plans shall be reviewed by the municipality for consistency
with the provisions of this chapter.
B.
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). 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.
C.
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.
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 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 fee must accompany a resubmission
of a disapproved SWM site plan.
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. Construction must begin within one year of the approval date and be completed within five years. 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 § 338-20 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 § 338-18 of this chapter.
A.
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.
B.
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.
If any licensed qualified professionals contributed to the construction
plans, then a licensed qualified professional must sign the completion
certificate.
C.
The final approved as-built submission must be recorded at the Blair
County courthouse.
A.
The Township Engineer or a designated representative of the Township
shall inspect the construction of the temporary and permanent stormwater
management system for the development site. The permittee shall notify
the Township Engineer at least 72 hours in advance of the completion
of the following key development phases:
(1)
At the completion of preliminary site preparation, including stripping
of vegetation, stockpiling of topsoil and construction of temporary
stormwater management and erosion control facilities.
(2)
At the completion of rough grading but prior to placing topsoil,
permanent drainage or other site development improvements and ground
covers.
(3)
During construction of the permanent stormwater facilities at such
times as specified by the Township Engineer.
(4)
Completion of permanent stormwater management facilities, including
established ground covers and plantings.
(5)
Completion of final grading, vegetative control measures or other
site restoration work done in accordance with the approved plan and
permit.
B.
No work shall commence on any subsequent phase until the preceding
phase has been inspected and approved. If there are deficiencies in
any phase, the Township Engineer shall issue a written description
of the required corrections and stipulate the time by which they must
be made.
C.
If during construction, the contractor or permittee identifies any
site condition, such as subsurface soil conditions, alterations in
surface or subsurface drainage which could affect the feasibility
of the approved stormwater facilities, he/she shall notify the Township
Engineer within 24 hours of the discovery of such condition and request
a field inspection. The Township Engineer shall determine if the condition
requires a stormwater plan modification.
D.
In cases where stormwater facilities are to be installed in areas
of landslide-prone soils or other special site conditions exist, the
Township, at its sole discretion, may require special precautions
such as soil tests and core borings, full-time inspection and/or similar
measures. All costs of any such measures shall be borne by the developer.
