A.
The SWM plan submission requirements under this section shall be
related to the level on impact as follows:
(1)
Level 1. Volume controls must be installed with the new construction;
however, the submission of a SWM plan is not required. All Level 1
construction activities shall be registered with the Township in order
to track cumulative DIA development. The applicant must agree to operate
and maintain the permitted volume controls.
(2)
Level 2, Simplified Plan.
(a)
Volume controls must be installed with the new construction. In addition, a simplified SWM plan shall be provided to the Township that complies with § 281-16D(1)(a), (b), (d) and (f); (2)(a); (3)(d) through (g), (l) and (r); (4)(a); and (6). This section can be satisfied by utilizing a simple site drawing showing the improvements and SW BMPs, and calculating runoff to properly size BMPs.
(b)
All Level 2 plans will be coordinated with and reviewed by the
Township Engineer. The owner shall also be required to provide a signed
maintenance agreement for any stormwater BMPs installed. The Township
reserves the right to require additional information (within the confines
of this chapter) from Level 2 applicants if in the best professional
judgment of their appointed Engineer such a request is deemed necessary.
(3)
Level 3, Significant DIA.
(a)
The SWM plan for all larger projects within the Township shall
comply with this section in its entirety.
(b)
Although not a requirement of this chapter, prior to proceeding
with a Level 3 SWM site plan preparation and submission, the applicant
is encouraged to request a pre-application meeting with the municipality's
Engineer and a staff member of the York County Conservation District
(if applicable) to discuss the plan concept and responsibility for
submission of required documents and information.
B.
Appropriate sections of the Springettsbury Township Subdivision and
Land Development Ordinance,[1] and other applicable ordinances of the municipality regarding
subdivision and land development plan preparation and applicable plan
requirements shall be followed in preparing all SWM site plans, regardless
of whether or not a SWM site plan involves a subdivision and/or land
development plan.
C.
The Township 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, or, in the case of minor deficiencies, the municipality may accept the submission of a revised SWM site plan as noted in § 281-19 of this chapter.
D.
All Level 3 SWM plans and reports accompanying all land development and subdivision plans shall be sealed by a professional engineer. The engineer shall certify that the plan and report meet the minimum design requirements of this article and shall include the items listed in Subsection D(1) through (7) below:
(1)
General information.
(a)
The overall stormwater management concept for the project, including
all stormwater BMPs utilized and any additional information required
for a post-construction stormwater management plan (PCSWMP) as applicable.
(b)
A determination of site conditions in accordance with the BMP
Manual. A detailed site evaluation shall be completed for projects
proposed in areas of carbonate geology or karst topography, as well
as for other environmentally sensitive areas, whether natural or man-made,
including floodplains, streams, lakes, ponds, hydric soils, wetlands,
brownfields and wellhead protection zones.
(c)
Expected project time schedule.
(d)
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.
(e)
A soil erosion and sediment control plan, where applicable,
as prepared for, reviewed, and approved by the York County Conservation
District.
(f)
The SWM site plan shall include an operation and maintenance
(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.
The O&M plan shall include a signed copy of a maintenance agreement
which appears in Appendix A of this chapter.[2] For all Level 3 SWM plans, this agreement shall be recorded
along with the land development documents and shall run with the land.
[2]
Editor's Note: Appendix A is included at the end of this chapter.
(g)
A description of permanent stormwater management techniques,
including the construction specifications of the materials to be used
for stormwater management facilities. Without intending to unduly
restrict the contractors to stipulate the means and methods employed
during the construction, all construction methods materials for new
land development in Springettsbury Township shall comply with the
construction and materials specifications of the Township.
(h)
A notarized signature of the owner of the parcel for which the
SWM.
(i)
A hydrogeologic assessment of the effects of stormwater runoff
on sinkholes where present.
(j)
The effect of the proposed regulated activity in terms of runoff
volumes and peak flows on adjacent properties and/or any existing
municipal stormwater collection system that may receive runoff from
the project site.
(2)
Stormwater runoff design computations.
(a)
The designer shall provide 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 § 281-10.
(b)
All calculations, assumptions and criteria used in the design
of the control device or method must be submitted with the plan including,
but not limited to, methodology for determining time of concentration
and weighted runoff curve numbers, stage/storage/discharge table,
summary table showing predevelopment, controlled and uncontrolled
post development peak discharge rates for all required storms, copies
of percolation test results when required and map showing contributory
drainage areas for stormwater facilities.
(3)
Stormwater site plans. All stormwater plans shall include the information listed in Subsection D(3)(a) through (q) below:
(a)
Topographic features.
[1]
The location of the project relative to highways, municipalities
or other identifiable landmarks. Existing contours at intervals of
two feet. In areas of steep slopes (greater than 15%), five-foot contour
intervals may be used.
[2]
Streams, lakes, ponds or other bodies of water within or near
Project.
[3]
Other physical features, including existing drainage swales,
wetlands and other areas of natural vegetation to be preserved.
(b)
Soil types and boundaries within the area.
(c)
Final contours at intervals of two feet. In areas of steep slopes
(greater than 15%), five-foot contour intervals may be used. Final
contours in area of stormwater management facility may not exceed
two-foot intervals.
(d)
Plan and profile drawings of all SWM BMPs, including drainage
structures, pipes, open channels, and swales.
(e)
The SWM site plan shall show the locations of existing and proposed
on-lot wastewater facilities and water supply wells.
(f)
Existing and proposed land uses.
(g)
Significant physical features and associated boundary limits
including flood hazard areas, sinkholes, existing drainage courses,
and areas of natural vegetation.
(h)
The location of existing and proposed utilities, stormwater
facilities, sanitary sewers, and water lines on the parcel and within
50 feet of property lines.
(i)
Proposed changes to the land surface and vegetative cover, and
the type and amount of existing and proposed impervious area.
(j)
Existing and proposed structures, buildings, streets, driveways,
access drives, and parking areas.
(k)
The name of the development, the name and address of the owner
of the property, and the name and address of the individual or firm
preparing the plan. Also to be included are the name, address, signature
and seal of any registered surveyor (attesting the accuracy of the
boundary survey), professional engineer, landscape architect, or professional
geologist (for geomorphological assessments) contributing to and/or
with a responsibility for any aspect of the plan where applicable.
(l)
The location of all easements related to stormwater BMPs such
as access to PCSM BMPs and conservation easements.
(m)
Preferred graphic and written scale of one inch equals no more
than 50 feet. For parcels of 20 acres or more, the preferred scale
is one inch equals no more than 100 feet. Dependent upon site conditions,
an alternative scale proposed by the applicant or his designee may
be accepted by the municipality.
(n)
North point (arrow).
(o)
A map showing all existing manmade features beyond the subject
parcel's boundary lines that will be affected by the proposed regulated
activities.
(p)
Horizontal and vertical profiles of all open channels, including
hydraulic capacity.
(q)
Drainage flow pathways.
(r)
Appropriate sections of the municipality's Subdivision and Land
Development Ordinance,[3] and other applicable ordinances of the municipality regarding
subdivision and land development plan preparation and applicable plan
requirements shall be followed in preparing all SWM site plans, regardless
of whether or not a SWM site plan involves a subdivision and/or land
development plan.
(4)
Management controls.
(a)
All stormwater management controls must be shown on the plan
and described in a narrative report, including:
[1]
Groundwater recharge methods such as seepage pits, bed or trenches.
The location of the proposed structure, including a detailed cross-section
and plan. If these structures are proposed, the locations of the septic
tank, drain field and wells must be shown. Groundwater recharge methods
must comply with the additional requirements in Subsection F of this
section.
[2]
Other control devices or methods such as rooftop storage, semipervious
paving material, grass swales, parking lot ponding, vegetated strips,
detention or retention ponds, storm sewers.
[3]
Basins. A cross-section of the basin showing the relationship
between the existing topography and the proposed bottom, spillway,
top of embankment and the outlet structure and the corresponding proposed
finished grade elevations. A detail of the outlet structure shall
be provided, including all pertinent construction requirements.
[4]
Schedule for installation of the control measures and devices.
In all cases the proposed stormwater control devices must be completed
prior to the creation of additional impervious area.
(5)
Stormwater collection system.
(a)
All catch basins, pipes, swales and other means of conveyance
of stormwater must be shown on the plan and described in a narrative
report, including:
[1]
A plan view of the collection system showing the location, size
and material for all catch basins, ditches, swales and pipes.
[2]
A profile of the collection system showing existing and proposed
finish grades, proposed invert elevations, top of grate elevations
and slope of each storm sewer or open channel segment.
[3]
Schedule for installation of the control measures and devices.
In all cases the proposed stormwater control devices must be completed
prior to the creation of additional impervious area.
(b)
All calculations, assumptions and criteria used in the design
of the stormwater collection system must be submitted with the plans.
(6)
Maintenance program. A maintenance program for all stormwater management facilities must be included. This program must include the ownership of the facilities and detail the financial responsibility for any required maintenance and shall comply with the requirements of Article V of this chapter. 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 D(1)(f) above.
(7)
The following signature block for the municipality: "(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)."
A.
All Level 1 plans shall be submitted to the Township for review and
approval. The Township may, at its discretion, request the assistance
of the Township Engineer to assist with the review and approval of
the plans.
B.
All Level 2 and 3 (without land development) SWM plans shall be submitted
to the Township for review and approval by the Engineer.
C.
All Level 3 SWM plans associated with new land development shall
be submitted to the Township in accordance with the requirements in
the SALDO.
A.
SWM site plans shall be reviewed by the municipality for consistency
with the provisions of this chapter.
B.
Modification requests.
(1)
When reviewing a SWM site plan, whether or not the SWM site plan is included in a subdivision and/or land development plan application, the municipality's governing body may, after consulting with DEP as noted in § 281-10D of this chapter, grant a modification of the requirements of one or more provisions of this chapter if the literal enforcement will enact undue hardship because of peculiar conditions pertaining to the land in question, provided that such modification will not be contrary to the public interest and that the purpose and intent of the ordinance is observed.
(2)
All requests for modifications from an applicant shall be in writing
and shall accompany and be a part of the application for approval
of a SWM site plan and/or a subdivision or land development plan as
applicable. The request shall state in full the grounds and facts
of unreasonableness or hardship on which the request is based, the
provision or provisions of the ordinance involved and the minimum
modification necessary.
(3)
The governing body of the municipality shall keep a written record
of all action on requests for modifications. The response of any consultation
and/or review by DEP shall be included as an original report if available
or otherwise documented in the required written record.
C.
SWM site plan review and approval procedure.
(1)
If a SWM site plan does not involve a subdivision and/or land development,
the review of the SWM site, recommendations, approval, approval with
conditions, or disapproval, i.e., the review and decision period,
shall occur within 45 days of submission to the municipality. However,
the municipality, in its sole discretion, may extend the review and
decision period another 45 days due to the nature of the application
and/or site conditions. If an extension of another 45 days is imposed
or granted by the municipality beyond the first forty-five-day review
and decision period designated by this paragraph, the municipality
shall notify the applicant in writing and deliver such notice to said
applicant within 15 days of the decision to extend the review and
decision period by the municipality. If no extension is imposed or
granted by the municipality beyond the first forty-five-day review
and decision period, and no decision has been rendered by the municipality
within that period, the SWM site plan shall be deemed approved. Similarly,
if after a forty-five-day extension of the review and decision period
has been imposed or granted by the municipality, and no decision has
been rendered by the municipality within that period, the SWM site
plan shall be deemed approved.
(2)
If a SWM site plan involves a subdivision and/or land development
plan, the period of time from the submission to the municipality of
the subdivision and/or land development plan application which includes
the SWM plan and the approval, approval with conditions, or disapproval,
i.e., review and decision period, shall be 90 days, in accordance
with the procedure for approval of plats in § 508 of the
Pennsylvania Municipalities Planning Code.
(3)
From the time an application for approval of a plat involving a subdivision
or land development plan, whether preliminary or final, which includes
a SWM site plan, is duly filed with the municipality, no change or
amendment of this chapter or other governing ordinance or plan shall
affect the decision on such application in accordance with the provisions
of the governing ordinances or plans as they stood at the time the
application was duly filed, as specified in § 508(4)(i)
of the Pennsylvania Municipalities Planning Code.
D.
Decision notification procedure.
(1)
In all cases, the decision of the municipality to approve or disapprove
the SWM site plan shall be in writing and shall be delivered to the
applicant no later than 15 days following the decision. If the SWM
site plan is disapproved, the written decision by the municipality
shall specify the defects in the application, describe the requirements
which were not met, and shall cite the provisions of the ordinance
relied upon.
(2)
If the SWM site plan is approved with conditions, the notification
to the applicant shall state the acceptable conditions for approval
and the time limit for satisfying such conditions. The time limit
for satisfying conditions of approval shall be the time limit prescribed
for conditional approval of subdivision and land development plans
as stated in the Municipality's Subdivision and Land Development Ordinance,[1] or the York County Subdivision and Land Development Ordinance
where applicable.
A revision to a previously submitted SWM site plan that involves
a change in SWM BMPs, stormwater management facilities, or changes
in analytical 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 revised SWM site plan in accordance
with this article, including applicable fees. For NPDES permitted
sites, any revised SWM site plan shall also be resubmitted to the
York County Conservation District for review. In the case of a SWM
site plan which contains minor deficiencies, such as a missing label,
omission of a required note or minor construction detail, as determined
by the municipality, the municipality may accept a resubmission of
such SWM site plan without the requirement of a review fee, or for
a lesser fee as provided for in the municipalities fee schedule.
A disapproved SWM site plan may be resubmitted, with the revisions addressing the municipality's concerns as stated regarding the original submission, to the municipality in accordance with this article. The applicable review fee must accompany the submission of a revised SWM site plan, unless such fee is waived by the municipality. (See § 281-19.)
A.
SWM site plans independent of subdivision and land development plans. The municipality's approval of a SWM site plan, when such plan is submitted independent of a subdivision and/or land development 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, in its sole discretion, specify a term of validity shorter than five years in the approval for any specific SWM site plan, particularly if the nature of the proposed SWM facilities requires more frequent maintenance and/or short-term replacement of certain components. 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 § 281-22 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 may be resubmitted in accordance with § 281-20 of this chapter.
B.
SWM site plans included in a subdivision and/or land development
plan. The municipality's approval of a SWM site plan, which is a part
of a subdivision and/or land development plan, authorizes that plan
and the regulated activities therein so that no subsequent change
or amendment in this chapter or other governing ordinances or plans
shall be applied to affect adversely the right of the applicant to
commence and to complete any aspect of the approved development in
accordance with the terms of such approval within five years from
such approval, as specified in § 508(4)(ii) through (vii)
of the Pennsylvania Municipalities Planning Code.
A.
The Township staff, Engineer or his designee shall have the right
to periodically inspect the site during construction of all permanent
stormwater facilities, regardless of the level of permitting required.
It is the responsibility of the permittee to notify the Township 72
hours in advance of the beginning of construction of stormwater management
facilities.
B.
Any portion of the work which does not comply with the approved plan
and report must be promptly corrected by the permittee within 14 days
after the written notice from the Township. No work may proceed on
the subdivision or land development or building construction unless
the required corrections have been made within the fourteen-day period.
C.
After construction of the facility, the developer's engineer will
certify to the Township that the construction of the stormwater management
facility was completed in accordance with the plans, specifications
and reports as originally submitted and approved by the Township.
D.
Work which is not properly documented and certified or which does
not accurately reflect correct site conditions will be rejected.
A.
The land owner/developer shall be responsible for providing as-built
plans of all SWM BMPs included in the approved SWM site plan for all
Level 2 and 3 plans. 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 qualified person verifying that all permanent SWM BMPs have
been constructed according to the approved plans and specifications.
If any licensed qualified person contributed to the construction plans,
then a licensed qualified person must sign the completion certificate.
C.
After receipt of the completion certification by the municipality,
the municipality may conduct a final inspection to verify compliance
with, and accuracy of, the as-built plans.
D.
AutoCAD drawings.
(1)
Upon completion of the SWM improvements, the developer shall provide
to Springettsbury Township a record drawing (also referred to as "as-built")
of the stormwater facilities as they are constructed in the field.
This information shall be provided in both a paper and an electronic
format. The electronic information shall be provided in an AutoCAD
format (version 2010 or higher) on the Pennsylvania South State Plane
coordinate system and on the NAVD 88 vertical datum with reference
ties to the nearest U.S.G.S. benchmark monument.
(2)
Items to be shown on the drawing include but are not limited to the
following items:
(a)
Property lines.
(b)
Right of way.
(c)
Easements.
(d)
Setbacks.
(e)
Corner monuments.
(f)
Storm sewer structures and invert elevations (manholes, inlets,
etc.).
(g)
Sanitary sewer structures and invert elevations (manholes, stubs,
cleanouts, etc.).
(h)
Utilities.
(i)
Buildings.
(j)
Substantial features (curbing, striping, etc.).
(k)
Stormwater management structures (basins, outfalls, structures,
etc.).
(l)
Stormwater BMPs (pervious pavement, infiltration facilities,
etc.).
(m)
Water quality management equipment (oil separators, grit/solids
removal, etc.).
