The following provisions shall be considered the overriding
performance standards against which all proposed stormwater control
measures shall be evaluated:
A. Any landowner and any person engaged in the alteration or development
of land which may affect stormwater runoff characteristics shall implement
such measures as are reasonably necessary to prevent injury to health,
safety or other property. Such measures shall include actions as required
and shall be evaluated according to the following standards:
(1) To assure that the maximum rate of stormwater runoff is no greater
after development than prior to development activities; or
(2) To manage the quantity, velocity and direction of resulting stormwater
runoff in a manner which otherwise adequately protects health and
property from possible injury.
B. The stormwater management plan for the development site must consider
all the stormwater runoff flowing over the site.
C. No discharge of toxic materials into any stormwater management system
shall be permitted. Where required by federal and state regulation,
the landowner or developer shall be responsible for obtaining a NPDES
permit for stormwater discharges.
D. For any development that is to be constructed in stages, the applicant
must demonstrate that stormwater facilities shall be installed to
manage stormwater runoff safely during each stage of development.
E. For the analysis of redevelopment projects 20% of the existing impervious
surface shall be considered meadow in good condition.
F. Where existing storm sewers are reasonably accessible, proposed developments
shall be required to connect with the storm sewer system unless insufficient
capacity or other reasons can be demonstrated to prevent the connection.
The Borough Engineer shall determine what is reasonably accessible.
The stormwater performance standards contained in this article
are intended to implement the standards and criteria contained in
the Monongahela River Stormwater Management plan, adopted and approved
in accordance with the Pennsylvania Storm Water Management Act. If there is any discrepancy between the provisions of
this section and the standards and criteria of the plan, or if the
watershed plan is subsequently amended, then the standards/criteria
of the current watershed plan shall govern.
Proposed erosion and sedimentation pollution control measures should be submitted with the stormwater management plan. These plans shall follow the guidelines set forth in the Borough's current Erosion and Sediment Pollution Control Ordinance under a separate cover. In addition, the plan shall be prepared in accordance with the Pennsylvania Erosion/Sedimentation Regulations (25 Pa. Code, Chapter
102) and the standards and guidelines of the county conservation district.
A. No regulated earth disturbance activities within the municipality
shall commence until approval by the municipality of an erosion and
sediment control plan for construction activities.
B. DEP has regulations that require an erosion and sediment control
plan for any earth disturbance activity of 5,000 square feet or more
under 25 Pa. Code § 102.4(b).
C. In addition, under 25 Pa. Code Chapter
92, a DEP "NPDES Construction Activities" permit is required
for Regulated Earth Disturbance activities.
D. Evidence of any necessary permit(s) for regulated earth disturbance activities from the appropriate DEP regional office or county conservation district must be provided to the municipality. The issuance of an NPDES construction permit (or permit coverage under the statewide General Permit (PAG-2) satisfies the requirements Subsection
C.
E. A copy of the erosion and sediment control plan and any required,
permit, as required by DEP regulations, shall be available at the
project site at all times.
Prior to releasing the final bond moneys, the Borough shall
receive an as-built drawing, signed and scaled by a registered surveyor,
and these plans shall include the following:
A. The location of any roads or driveways constructed for the land development
or single-family home.
B. The location, tops and flow lines of all storm sewers constructed
within the land development or single-family home.
C. The location, depth and contours of the detention or retention facilities
constructed for the land development or single-family home.
D. A detail of the outlet structure for the detention or retention facility
as constructed.
E. The location and details of all post-construction stormwater management
BMPs including water quality devices.
F. A revised stormwater management report reflecting the final contours
for a detention pond as constructed.