[Ord. 705, 4/28/2011]
For any of the activities regulated by this Part 5, the preliminary
or final approval of subdivision and/or land development plans, the
issuance of any building or occupancy permit, the commencement of
any earth disturbance or activity may not proceed until the property
owner or applicant or his/her agent has received written approval
of a SWM site plan from Warminster Township and an approval of an
adequate erosion and sediment (E&S) control plan review from Warminster
Township and the County Conservation District.
[Ord. 705, 4/28/2011]
The SWM site plan shall consist of a general description of
the project, including calculations, maps, and plans. A note on the
maps shall refer to the associated computations and E&S control
plan by title and date. The cover sheet of the computations and E&S
control plan shall refer to the associated maps by title and date.
All SWM site plan materials shall be submitted to Warminster Township
in a format that is clear, concise, legible, neat, and well organized;
otherwise, the SWM site plan shall not be accepted for review and
shall be returned to the applicant. The following items shall be included
in the SWM site plan:
A. General.
(1)
General description of the project, including plan contents described in §
26-532, Subsection
B.
(2)
General description of proposed SWM techniques to be used for
SWM facilities.
(3)
Complete hydrologic and hydraulic computations for all SWM facilities.
(4)
All reviews and letters of adequacy from the Conservation District
for the erosion and sedimentation plan as required by Warminster Township,
county or state regulations.
(5)
A general description of proposed nonpoint source pollution
controls.
(6)
Appropriate sections from Chapter
22, Subdivision and Land Development, and other applicable local ordinances, shall be followed in preparing the SWM site plan.
B. Plans. SWM site plan shall provide the following information:
(1)
The overall stormwater management concept for the project.
(2)
A determination of natural site conditions and stormwater management
needs. This shall include, but not be limited to:
(a)
Site features:
1)
The location of the project relative to highways, municipal
boundaries or other identifiable landmarks.
2)
The locations of all existing and proposed utilities, sanitary
sewers, and water lines on site and to within 50 feet of property
lines.
3)
Proposed structures, roads, paved areas, and buildings.
4)
The total tract boundary and size with distances marked to the
nearest foot and bearings to the nearest degree.
5)
Plan and profile drawings of all SWM BMPs, including drainage
structures, pipes, open channels, and swales. At a minimum, this should
include pre- and post-drainage area maps, an overall post-construction
stormwater management plan, stormwater details sheets, and landscape
plans (if proposing bioretention facilities, low-impact development,
bioretention, or vegetative basins).
6)
The locations and minimum setback distances of existing and
proposed on-lot wastewater facilities and water supply wells.
7)
The location of all erosion and sediment control facilities.
8)
The location of proposed septic tank infiltration areas and
wells in cases where groundwater recharge measures such as seepage
pits, beds or trenches are proposed.
(b)
Natural site conditions:
1)
An existing resource and site analysis map (ERSAM) showing environmentally
sensitive areas, including but not limited to:
g)
Hydrologic soil groups A and B;
k)
Existing recharge areas; and
l)
Floodplains.
The area of each of these sensitive areas shall be calculated and should be consistent with the runoff volume calculation § 26-523, Subsection C(1).
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2)
A detailed site evaluation for projects proposed in areas of
frequent flooding, karst topography, and other environmentally sensitive
areas, such as brownfields and source water protection areas.
3)
Existing and proposed contour lines (two feet).
4)
The total extent of the drainage area upstream from the site
and all down gradient receiving channels, swales and waters to which
stormwater runoff or drainage will be discharged.
5)
An overlay showing soil types and boundaries and a statement
as to where the soils data was obtained. Overlay shall include a table
identifying each soil type, hydrologic soil group, construction limitations
and resolutions. Delineation of soils on the site shall be based on
the Official Soil Survey provided by the U.S. Department of Agriculture,
Natural Resources Conservation Service, Web Soil Survey (http://websoilsurvey.nrcs.usda.gov/)
and on-site soil study. Soil study shall be conducted by a soil scientist
and shall include sufficient probes/deep holes to evaluate application
of BMPs.
(c)
Stormwater runoff design computations and documentation as specified in this Part
5, or as otherwise necessary to demonstrate that the maximum practicable measures have been taken to meet the requirements of this Part
5, including the recommendations and general requirements in §
26-521.
(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.
(3)
The format of the plan shall include the following;
(a)
The expected project time schedule.
(b)
The name of the development, the name and address of the owner
of the property, and the name of the individual or firm preparing
the plan.
(d)
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.
(f)
An access easement around all stormwater management facilities
is required that would provide ingress to and egress from a public
right-of-way. The size of the easement shall commensurate with the
maintenance and access requirements determined in the design of the
BMP.
(g)
A key map showing all existing man-made features beyond the
property boundary that would be affected by the project.
(h)
A note on the plan indicating the location and responsibility
for maintenance of stormwater management facilities. All facilities
shall meet the performance standards and design criteria specified
in this Part 5.
(i)
The following signature block for the design engineer: "I, (design
engineer), on this date (date of signature), hereby certify that the
SWM site plan meets all design standards and criteria of The Neshaminy
Creek Watershed Act 167 Stormwater Management Ordinance or Plan."
(j)
A statement, signed by the applicant, acknowledging that any
revision to the approved SWM site plan must be approved by Warminster
Township and that a revised E&S plan must be submitted to the
Conservation District.
(4)
A soil erosion and sediment control plan, where applicable,
as prepared for and submitted to the approval authority.
(5)
The SWM site plan shall include an operations and maintenance
(O&M) plan for all existing and proposed physical stormwater management
facilities, as well as schedules and costs for O&M activities.
This plan shall address long-term ownership and responsibilities for
O&M.
[Ord. 705, 4/28/2011]
Warminster Township requires submission of a complete SWM site
plan, as specified in this Part 5.
A. Proof of application or documentation of required permit(s) or approvals
for the programs listed below shall be part of the plan:
(1)
NPDES Permit for Stormwater Discharges from Construction Activities.
(2)
Any other permit under applicable state or federal regulations.
B. For regulated activities specified in §
26-505, Subsection
3A and
B:
(1)
The stormwater management plan shall be submitted by the developer
to the Code Enforcement Officer as part of the preliminary plan submission
for the subdivision or land development.
(2)
Four copies of the stormwater management plan shall be submitted.
(3)
Distribution of the stormwater management plan shall be made
by the Code Enforcement Officer as follows:
(a)
One copy to the Board of Supervisors.
(b)
One copy to the Planning Commission.
(c)
One copy to the Township Engineer.
(d)
One copy to the Township file.
(4)
Applicant shall be responsible to make applications to Buck
County Planning Commission and Bucks County Conservation District.
The Township shall be copied on all correspondence.
C. For all other regulated activities specified under §
26-505, Subsection
3:
(1)
The stormwater management plan shall be accompanied by the requisite
fee as specified in this Part 5.
(2)
Two copies of the stormwater management plan shall be submitted
to the Code Enforcement Officer.
(3)
Distribution of the stormwater management plan shall be made
by the Code Enforcement Officer as follows:
(a)
One copy to the Township Engineer.
(b)
One copy to the Township file.
(4)
Applicant shall be responsible to make applications to Bucks
County Conservation District. The Township shall be copied on all
correspondence.
D. For regulated activities requiring permits from PADEP or the U.S.
Army Corps of Engineers, the applicant shall make all submittals directly
to the agency with all required submittal documents and fees. The
Township shall be copied on all correspondence.
E. Any submissions to the agencies listed above that are found to be
incomplete shall not be accepted for review and shall be returned
to the applicant with a notification in writing of the specific manner
in which the submission is incomplete.
F. Additional copies shall be submitted as requested by Warminster Township
or PADEP.
[Ord. 705, 4/28/2011]
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
Warminster Township shall require a resubmission of the modified SWM
site plan in accordance with this Part 5D.
[Ord. 705, 4/28/2011]
A disapproved SWM site plan may be resubmitted, with the revisions
addressing Warminster Township's concerns, to Warminster Township
in accordance with this Part 5D. The applicable review fee must accompany
a resubmission of a disapproved SWM site plan.