For any of the activities regulated by this Part 1 and not eligible for the exemptions provided in § 26-122, the final approval of subdivision and/or land development plans, the issuance of any building or occupancy permit, or the commencement of any land disturbance activity may not proceed until the applicant has received written approval of a SWM site plan from the Township.
A.
The SWM site plan and SWM site report shall consist of all applicable
calculations, maps, and plans. All SWM site plan materials shall be
submitted to the Township in a format that is clear, concise, legible,
neat and well organized; otherwise, the SWM site plan shall be rejected.
B.
Appropriate sections from the Township Subdivision and Land Development Ordinance (Chapter 22), and other applicable local ordinances, shall be followed in preparing the SWM site plan.
(1)
The SWM site plan shall include, but not be limited to:
(a)
Plans shall be of one size and in a form that meets the requirements
for recording in the office of the Recorder of Deeds of Butler County.
[1]
Plans for tracts of less than 20 acres shall be drawn at a scale
of one inch equals no more than 50 feet.
[2]
Plans for tracts of 20 acres or more shall be drawn at a scale
of one inch equals no more than 100 feet.
[3]
Lettering shall be drawn to a size to be legible if the plans
are reduced to 1/2 size.
(b)
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 plan.
(c)
The date of submission and dates of all revisions.
(d)
A graphical and written scale on all drawings and maps.
(e)
A North arrow on all drawings and maps.
(f)
A location map at a minimum scale of one inch equals 1,000 feet
and illustrates the project relative to highways, municipalities or
other identifiable landmarks.
(g)
Metes and bounds description of the entire tract perimeter.
(i)
Perimeters of existing water bodies within the project area,
including stream banks, lakes, ponds, springs, field delineated wetlands
or other bodies of water, sinkholes, flood hazard boundaries (FEMA
delineated floodplains and floodways), areas of natural vegetation
to be preserved, the total extent of the upstream area draining through
the site, and overland drainage paths. In addition, any areas necessary
to determine downstream impacts, where required for proposed stormwater
management facilities, must be shown.
(j)
The location of all existing and proposed utilities, on-lot
wastewater facilities, water supply wells, sanitary sewers, and waterlines
on and within 50 feet of property lines, including inlets, manholes,
valves, meters, poles, chambers, junction boxes, and other utility
system components.
(k)
A key map showing all existing man-made features beyond the
property boundary that may be affected by the project.
(l)
Soil names and boundaries with identification of the hydraulic
soil group classification, including rock outcroppings.
(m)
Proposed impervious surfaces (structures, roads, paved areas,
and buildings), including plans and profiles of roads and paved areas
and floor elevations of buildings.
(n)
Existing and proposed land use(s).
(o)
Horizontal alignment, vertical profiles, and cross sections
of all open channels, pipes, swales and other BMPs.
(p)
The location and clear identification of the nature of permanent
stormwater BMPs.
(q)
The location of all erosion and sedimentation control facilities,
shown on a separate drawing from the SWM site plan (typically an E&S
plan).
(r)
A minimum twenty-foot-wide access easement around all stormwater
management facilities that would provide ingress to and egress from
a public right-of-way. In lieu of providing an easement to the public
right-of-way, a note may be added to the plan granting the Township
or its designees access to all easements via the nearest public right-of-way.
(s)
Construction details for all drainage and stormwater BMPs.
(t)
Construction sequence.
(u)
Identification of short-term and long-term ownership, operations,
and maintenance responsibilities.
(v)
Notes and statements:
[1]
A statement, signed by the landowner, acknowledging that the
stormwater BMPs are fixtures that cannot be altered or removed without
prior approval by the Township.
[2]
A statement referencing the operation and maintenance (O&M) agreement required by § 26-168 and stating that the O&M agreement is part of the SWM site plan.
[3]
A note indicating that record drawings will be provided for
all stormwater facilities prior to occupancy, or the release of the
surety bond.
[4]
The following signature block for the registered professional
preparing the stormwater management plan:
"I, _________________________, hereby certify that the stormwater
management plan meets all design standards and criteria of the Jackson
Township Stormwater Management Ordinance."
[5]
The following signature block for the Township Engineer reviewing
the stormwater management plan:
"I, _________________________, have reviewed this stormwater
management plan in accordance with the design standards and criteria
of the Jackson Township Stormwater Management Ordinance."
(2)
The SWM site report shall include, but not be limited to:
(a)
General data, including:
[1]
Project name.
[2]
Project location, address of the property site.
[3]
Name, address, and telephone number of the applicant/owner of
the property.
[4]
Name, address, telephone number, e-mail address, and engineering
seal of the individual preparing the SWM site report.
[5]
Date of submission and revisions.
(b)
Project description narrative that clearly discusses the project
and provides the following information, where applicable:
[1]
Narrative:
[a]
Statement of the regulated activity describing
what is being proposed. Overall stormwater management concept with
description of permanent stormwater management techniques, including
construction specifications and materials to be used for stormwater
management facilities.
[b]
Expected project schedule.
[c]
Location map showing the project site and its location
relative to release rate districts.
[d]
Detailed description of the existing site conditions,
including a site evaluation completed for projects proposed in areas
of carbonate geology or karst topography, and other environmentally
sensitive areas such as brownfields.
[e]
Total site area, pre and post, which must be equal
or have an explanation as to why it is not.
[f]
Total site impervious area.
[g]
Total off-site areas.
[h]
Number and description of stormwater management
facilities.
[i]
Type of development.
[j]
Predevelopment land use.
[k]
Whether site is a water quality sensitive (WQS)
development.
[l]
Whether site is in a defined sensitive area.
[m]
Types of water quality and recharge systems used,
if applicable.
[n]
Complete hydrologic, hydraulic, and structural
computations for all stormwater management facilities.
[o]
A written maintenance plan for all stormwater features,
including detention facilities and other stormwater management elements.
[p]
Identification of ownership and maintenance responsibility
for all permanent stormwater management facilities.
[q]
Other pertinent information, as required.
[2]
Summary tables:
[a]
Predevelopment hydrologic soil group (HSG) assumptions,
curve numbers (CN), computation of average slope, hydraulic length,
computed time of concentration.
[b]
Existing conditions runoff volume and peak rate
of runoff.
[c]
Post-development runoff volume and peak rate of
runoff.
[d]
Undetained areas, areas to ponds.
[e]
Land use for each subarea.
[f]
Hydrologic soil group (HSG) assumptions, curve
numbers (CN).
[g]
Time of concentration computed for each subarea.
[h]
Post-development peak rate of runoff routed to
ponds and out.
[i]
Pond maximum return period design data, including
maximum water surface elevation, berm elevation, and emergency spillway
elevation.
[j]
Water quality depth and volume requirements.
[3]
Calculations:
[a]
Complete hydrologic, hydraulic and structural computations,
calculations, assumptions, and criteria for the design of all stormwater
BMPs.
[b]
Details of the berm embankment and outlet structure
indicating the embankment top elevation, embankment side slopes, top
width of embankment, emergency spillway elevation, perforated riser
dimensions, pipe barrel dimensions and dimensions and spacing of anti-seep
collars.
[c]
Design computations for the control structures
(pipe barrel and riser, etc.).
[d]
A plot or table of the stage-storage (volume vs.
elevation) and all supporting computations.
[e]
Routing computations.
(c)
Reports that do not clearly indicate the above information may
be rejected for review by the Township and will be returned to the
applicant.
(d)
Description of, justification, and actual field results for
infiltration testing with respect to the type of test and test location
for the design of infiltration BMPs.
(e)
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.
(f)
Description of the proposed changes to the land surface and
vegetative cover, including the type and amount of impervious area
to be added.
(g)
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.
(3)
Supplemental information to be provided prior to recording of the
SWM site plan, as applicable:
(b)
Signed and executed easements, as required for all on-site and
off-site work.
(c)
An erosion and sedimentation control plan and approval letter
from the Conservation District.
(d)
An NPDES permit.
(e)
Permits from PADEP and ACOE.
(f)
Geologic assessment.
(g)
Soils investigation report, including boring logs, compaction
requirements, and recommendations for construction of detention basins.
(h)
A highway occupancy permit from PennDOT when utilization of
a PennDOT storm drainage system is proposed or when proposed facilities
would encroach onto a PennDOT right-of-way.
A.
The Township shall require receipt of a complete SWM site plan and
report as specified in this Part 1. The Township shall review the
SWM site plan and report for consistency with the purposes, requirements,
and intent of this Part 1.
B.
The Township shall not approve any SWM site plan and report that is deficient in meeting the requirements of this Part 1. At its sole discretion and in accordance with this Part 1, Article H, when a SWM site plan and report is found to be deficient, the Township may disapprove the submission and require a resubmission, or in the case of minor deficiencies, the Township may accept submission of modifications.
C.
If the SWM site plan and report is not part of a subdivision or land
development plan, then the Township Manager shall be responsible for
approving or disapproving the SWM site plan and report and the Township
Manager shall notify the applicant in writing within 45 calendar days
whether the SWM site plan and report is approved or disapproved. If
the SWM site plan and report involves a subdivision or land development
plan, then the Board of Supervisors shall be responsible for approving
or disapproving the SWM site plan and report, and the approval process
and timing shall follow the subdivision and land development process
according to the Municipalities Planning Code, 53 P.S. § 10101
et seq.
D.
The Township Building Code Official shall not issue a building permit
for any regulated activity if the SWM site plan and report has been
found to be inconsistent with this Part 1, as determined by the Township.
All required permits from PADEP must be obtained prior to issuance
of a building permit.
A modification to a submitted SWM site plan and report for a
development site that involves a change in stormwater management facilities
or techniques, 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 SWM site plan as determined by
the Township, shall require a resubmission of the modified SWM site
plan in accordance with this Part 1.
A disapproved SWM site plan and report may be resubmitted, with
the revisions addressing the Township's concerns documented in writing,
to the Township in accordance with this Part 1. The applicable fee
and/or deposit must accompany a resubmission of a disapproved SWM
site plan and report.
The Township's approval of a SWM site plan and report 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
Township 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 Township signs the approval for a SWM site
plan. If stormwater management facilities included in the approved
SWM site plan have not been constructed, or if a record drawing of
these facilities has not been approved within this time, then the
Township may consider the SWM site plan disapproved and may revoke
any and all permits or approvals.
A.
The applicant shall be responsible for providing record drawings of all stormwater BMPs included in the approved SWM site plan. The record drawing and an explanation of any discrepancies with the approved SWM site plan shall be submitted to the Township as a prerequisite for the release of the guarantee or issuance of an occupancy permit required by the Zoning Ordinance (Chapter 27).
B.
The record drawing shall include a certification of completion signed
by a qualified professional verifying that all permanent stormwater
BMPs have been constructed according to the approved SWM site plan
and report.
(1)
Drawings shall show all approved revisions and elevations and inverts
to all manholes, inlets, pipes, and stormwater control facilities.
(2)
Submission shall include a comparison of the constructed stage-storage
(volume vs. elevation) of all aboveground and below-ground stormwater
storage facilities to the approved design.
C.
After receipt of the record drawing and certification of completion
by the Township, the Township may conduct a final inspection.
