A.
Approval of a stormwater management site plan does not exempt or
relieve the developer or any builder or owner from any requirements
to submit grading plans to the Township prior to issuance of a land
use or building permit.
B.
All construction activity shall be in accordance with the Construction
and Material Specifications, Zoning Ordinance[1] and Subdivision Ordinance,[2] as applicable. Deviations from the Construction and Material
Specifications must be noted on the stormwater management site plan
and approved by the Township Engineer.
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 Township may either disapprove the submission
and require a resubmission or, in the case of minor deficiencies,
the Township may accept submission of modifications.
The stormwater management site plan shall consist of all applicable
calculations, maps, and plans. A note on the maps shall refer to the
associated computations and erosion and sedimentation control plan
by title and date. The cover sheet of the computations and erosion
and sedimentation control plan shall refer to the associated maps
by title and date. All stormwater management site plan materials shall
be submitted to the Township in a format that is clear, concise, legible,
neat, and well organized; otherwise, the stormwater management site
plan shall be returned to the applicant as though it were not filed.
The following items shall be included in the stormwater management
site plan:
A.
General.
(1)
General description of project, including project time schedule.
(2)
General description of permanent stormwater management facilities
and BMPs, including construction specifications of the materials to
be used for such stormwater management facilities.
(3)
Complete hydrologic, hydraulic, and structural computations for all
stormwater management facilities and BMPs.
(4)
The stormwater management site plan shall be signed and sealed by
a qualified professional.
(5)
The stormwater management site plan shall be signed by the Township
official responsible for review and approval of the plan.
B.
Map(s) of the project area shall be submitted on twenty-four-inch-by-thirty-six-inch
or thirty-inch-by-forty-two-inch sheets. The contents of the maps(s)
shall include, but not be limited to:
(1)
The location of the project relative to highways, municipalities
or other identifiable landmarks.
(2)
Existing contours at intervals of two feet. In areas of steep slopes
(greater than 15%), five-foot contour intervals may be used.
(3)
Existing streams, lakes, ponds, or other bodies of water within the
project area.
(4)
Other physical features including flood hazard boundaries, sinkholes,
streams, existing drainage courses, areas of natural vegetation to
be preserved, and the total extent of the upstream area draining through
the site.
(5)
The locations of all existing and proposed utilities, sanitary sewers,
waterlines, on-lot septic systems and water supply wells on site or
within 50 feet of property lines.
(6)
An overlay showing soil names, boundaries and hydrologic soil classification.
(7)
Proposed changes to the land surface and vegetative cover, including
the type and amount of impervious area that would be added.
(8)
Proposed structures, roads, paved areas, and buildings.
(9)
Final contours at intervals of two feet. In areas of steep slopes
(greater than 15%), five-foot contour intervals may be used, provided,
however, that final contours in any area containing stormwater management
facilities may not exceed two feet.
(10)
The name of the project, the name and address of the developer
and owner of the property, and the name of the individual or firm
preparing the plan.
(11)
The date of submission.
(12)
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.
(13)
A North arrow.
(14)
The total tract boundary and size with distances marked to the
nearest foot and bearings to the nearest degree.
(15)
Existing and proposed land use(s).
(16)
A key map showing all existing man-made features beyond the
property boundary that would be affected by the project.
(17)
Horizontal and vertical profiles of all open channels, including
hydraulic capacity.
(18)
Overland drainage paths.
(19)
A note on the stormwater management site plan indicating the
location and responsibility for maintenance of stormwater management
facilities and BMPs that would be located off site. All off-site facilities
shall meet the performance standards and design criteria specified
in this chapter.
(20)
A statement, signed by the landowner, acknowledging the stormwater
management facilities to be permanent fixtures that can be altered
or removed only after approval of a revised plan by the Township.
(21)
The location of all facilities installed or to be constructed
and installed pursuant to an erosion and sedimentation control plan
for the project.
(22)
The location of all groundwater recharge facilities.
C.
Supplemental information.
(1)
A written description of the following information shall be submitted.
(a)
The overall stormwater management concept for the project.
(b)
Stormwater runoff computations as specified in this chapter.
(c)
Stormwater management techniques to be applied both during and
after development.
(d)
A summary table showing predevelopment and controlled and uncontrolled
post-development discharge rates for all required designed storms.
(e)
A justification must be included in the SWM site plan if BMPs
other than green infrastructure methods and LID practices are proposed
to achieve the volume, rate, and water quality controls under this
chapter.
(2)
An erosion and sedimentation control plan, where applicable, including
all reviews and approvals, as required by DEP.
(3)
A geologic assessment of the effects of runoff on sinkholes as specified
in this chapter, including 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,
and other environmentally sensitive areas, such as brownfields.
(4)
The effect of the project (in terms of runoff volumes, water quality
and peak flows) on adjacent and downstream properties and on any existing
storm sewer that may receive runoff from the project site.
(5)
Soil evaluation to justify infiltration site location and results
of on-site testing to establish infiltration rates used for design.
D.
Stormwater management facilities.
(1)
All stormwater management facilities must be located on a stormwater
management site plan and described in detail, including:
(a)
Groundwater recharge methods, such as seepage pits, beds or trenches. The location of the proposed structure, including a detailed cross section with construction and material specifications. If these structures are proposed, the locations of septic tank infiltration areas and wells must be shown. Groundwater recharge methods must comply with the additional requirements in Subsection D(2) of this section.
(b)
Other control devices or methods, such as rooftop storage, semipervious
paving materials, grass swales, parking lot ponding, vegetated strips,
detention or retention basins, storm sewer, etc., including construction
and material specifications.
(c)
Cross sections of any detention or retention basins 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
and material specifications.
(d)
A schedule for the installation of the stormwater management
facilities. In all cases, the stormwater management facilities must
be completed prior to the creation of additional impervious surface.
(2)
The following additional requirements apply to all proposed groundwater
recharge methods such as seepage pits, beds, trenches, leaching wells
and cisterns:
(a)
Representative percolation tests must be made throughout the
area proposed for development. At least one percolation test must
be included in each soil group and at least one percolation test must
be conducted for each five lots proposed for development. The percolation
test must be sampled at the invert depth of the proposed structure.
(b)
Seepage pits, beds or trenches shall not be permitted for any
development of more than five lots without prior approval of the Township.
(3)
All calculations, assumptions, and criteria used in the design of
the stormwater management facilities must be shown.
(4)
An O&M plan for stormwater management facilities and BMPs meeting
the requirements of this chapter must be included. The O&M plan
must include the ownership of the stormwater management facilities
and detail the financial responsibility for any required maintenance.
(5)
Provisions deemed adequate by the Township for permanent access for
O&M, as necessary to implement the O&M plan, shall be shown
on the stormwater management site plan or included with the plan submission
as separate easement or maintenance agreements.
For all activities regulated by this chapter, the steps below
shall be followed for submission. For any activities that require
a joint permit application under Chapter 105 (Dam Safety and Waterway
Management) or Chapter 106 (Floodplain Management) of the DEP Rules
and Regulations, or require a PennDOT highway occupancy permit, or
require any other permit under applicable state or federal regulations,
the proof of application for that permit(s) shall be part of the stormwater
management site plan. The stormwater management site plan shall be
coordinated with the state and federal permit process.
A.
Stormwater management site plans shall be reviewed by the Township
for consistency with the provisions of this chapter and the IWRP.
B.
Approval of a stormwater management site plan and waiver requests
submitted with an application for approval under the Subdivision Ordinance[1] shall be granted or denied by the Board of Supervisors
following the recommendation of the Township Engineer. Approval of
stormwater management site plans and waiver requests submitted where
an application for approval under the Subdivision Ordinance is not
required shall be granted or denied by the Township Codes Enforcement
Officer with the recommendation of the Township Engineer where deemed
necessary. Approval of all other stormwater management site plans
and waiver requests shall be granted or denied by the Township Engineer.
C.
A written review of the stormwater management site plan will be provided
to the Township by the Township Engineer, when applicable, outlining
the results of the review. The written review shall detail any discrepancies
between the stormwater management site plan and this chapter or the
IWRP and any recommendations for the stormwater management site plan
to achieve compliance or a waiver request to be granted.
D.
For regulated activities that require an NPDES permit, the stormwater
management site plan shall not be finally approved until the Township
has been provided a letter of consistency from the Conservation District
signifying approval of the erosion and sedimentation control plan.
E.
For any SWM site plan that proposes to use any BMPs other than green
infrastructure and LID practices to achieve the volume and rate controls
required under this chapter, the Township will not approve the SWM
site plan unless it determines that green infrastructure and LID practices
are not practicable.
F.
No building, zoning or other permits for any regulated activity shall
be approved or issued by the Township if the stormwater management
site plan has been disapproved or approved with conditions. In the
latter case, the permits may be issued by the Township at its discretion
upon acceptance, in writing, by the applicant of the conditions to
approval.
G.
Time frames.
(1)
If regulated activities do not involve an application for subdivision
and/or land development, the review of the stormwater management site
plan, recommendations, approval, approval with conditions, or disapproval,
i.e., the review and decision period, shall occur within 45 days from
the date of submission of an administratively complete application
to the Township. However, the Township, 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 Township beyond the first forty-five-day
review and decision period designated by this subsection, the Township
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 Township.
(2)
If a stormwater management site plan involves an application for
approval under the Subdivision Ordinance, the period of time from
the submission to the Township of the subdivision and/or land development
plan application which includes the stormwater management site plan
and the approval, approval with conditions, or disapproval, i.e.,
review and decision period, shall be in accordance with the procedure
for approval of plats in Section 508 of the MPC.[2] The subdivision and/or land development plan shall not
be finally approved until final approval of the stormwater management
site plan.
[2]
Editor's Note: See 53 P.S. § 10508.
(3)
When a stormwater management site plan is required, no application
for a building, zoning or other permit for any regulated activity
shall be administratively complete for purposes of calculating approval
times until the stormwater management site plan has been approved.
In the case of a conditional approval, the permits may be issued by
the Township at its discretion upon acceptance, in writing, by the
applicant of the conditions to approval.
H.
Decision notification procedure. In all cases, the decision of the
Township to approve or disapprove the stormwater management site plan
shall be in writing and shall be delivered to the applicant no later
than 15 days following the decision. If the stormwater management
site plan is approved with conditions, the applicant shall accept
or reject the conditions, in writing, within 30 days following the
date of decision. Failure by an applicant to accept or reject the
conditions of approval, in writing, within 30 days shall automatically
rescind the approval.
A.
A revision to a submitted stormwater management site plan for a project site that involves a change in stormwater management facilities or BMPs, or that involves the relocation or redesign of stormwater management facilities, or that is necessary because soil or other conditions are not as stated on the stormwater management site plan as determined by the Township Engineer, shall require a resubmission of the modified stormwater management site plan consistent with § 199-21 of this chapter and be subject to review as specified in § 199-22 of this chapter, or a modification to a stormwater management site plan for which a formal action has not been taken by the Township shall be submitted to the Township consistent with § 199-21 of this chapter and be subject to review as specified in § 199-22 of this chapter. For NPDES-permitted sites, any revised stormwater management site plan shall also be resubmitted to the York County Conservation District for review. A resubmitted stormwater management site plan shall be subject to the requirements of this chapter as amended through the date of resubmission.
B.
A disapproved SWM site plan may be resubmitted, with the revisions
addressing the Township's concerns, to the Township in accordance
with this article. The applicable review fee must accompany a resubmission
of a disapproved SWM site plan.
The Township's approval of a stormwater management site plan, when such plan is submitted independent of a subdivision and/or land development plan, authorizes the regulated activities contained in the stormwater management site plan for a maximum term of validity of five years following the date of approval. The Township may, in its sole discretion, specify a different term of validity for any specific stormwater management site plan, particularly if the nature of the proposed stormwater management facilities require more frequent maintenance and/or short-term replacement of certain components. Terms of validity shall commence on the date the Township signs the approval for a stormwater management site plan. If an approved stormwater management site plan is not completed according to § 199-25 within the term of validity, then the Township may consider the stormwater management site plan approval expired and may revoke any and all permits associated with the stormwater management site plan. Expired stormwater management site plans may be resubmitted for approval, but shall be required to comply with the ordinance then in effect.
A.
The developer shall be responsible for providing as-built plans of
all BMPs included in the approved stormwater management site plan.
The as-built plans and an explanation of any discrepancies with the
construction plans shall be submitted to the Township.
B.
The as-built submission shall include a certification of completion
signed by a qualified professional verifying that all permanent BMPs
have been constructed according to the approved plans and specifications.
If any licensed qualified professional contributed to the construction
plans, then a licensed qualified professional must sign the completion
certificate.
C.
After receipt of the completion certification by the Township, the
Township may conduct a final inspection to verify compliance with,
and accuracy of, the as-built plans. The developer shall be responsible
for the cost of final inspection and review of the as-built plans.
