For all regulated activities not eligible for exemptions pursuant to § 190-4 of this chapter the applicant shall submit a stormwater management plan and report prepared by a professional engineer licensed in the Commonwealth of Pennsylvania, which shall contain, but not be limited to, the following:
A suitable map of the watershed for any and all named streams within
which the project is proposed (A United States Geological Survey quadrangle
map is usually sufficient), with existing and proposed development
areas presented on the map.
Hydrologic (watershed) and water feature boundaries, including all
areas flowing to the proposed project, existing streams (including
first order and intermittent streams), springs, lakes, ponds, or other
bodies of water within the project area.
Sufficient topographical information with elevations to verify the
location of all ridges, streams, etc. (two-foot contour intervals
within the project's boundaries and for proposed off-site improvements;
for slopes greater than 15%, five-foot contours are acceptable).
Notes pertaining to and locations of existing standing water, areas
of heavy seepage, springs, wetlands, streams, and hydrologically sensitive
areas. The Chapter 93 water quality standards use designation must
also be provided on the plan.[1]
General type of soils with hydrologic soil group noted, estimated
permeabilities in inches per hour, and location and results of all
soil tests and borings (if needed).
One-hundred-year flood elevations for any special flood hazard areas
on or within 100 feet of the property. For redevelopment sites, also
show the ten-year and twenty-five-year flood elevations for any special
flood hazard areas on or within 100 feet of the property. The source
of these elevations shall also be shown on the plans.
A plan of the proposed stormwater drainage system attributable
to the activity proposed, including runoff calculations, stormwater
management practices to be applied both during and after development,
and the expected project time schedule.
The design computations for all proposed stormwater drainage
systems, including storm drain pipes, inlets, runoff control measures
and culverts, drainage channels, and other features, facilities, and
stormwater management practices.
A grading plan, including all areas of disturbance of the subject
activity. The total area of disturbance shall be noted in square feet
and acres. Topographic contours showing the existing and proposed
final contours at an interval of two feet; in areas having slope of
greater than 15%, a five-foot contour interval may be used.
The effect of the project (in terms of runoff volumes and peak
flows) on adjacent properties and on any other stormwater collection
system that may receive runoff from the project site and specifics
of how erosion and flooding impacts to adjacent properties will be
avoided or otherwise mitigated.
An operation and maintenance plan consistent with the requirements of Article V. Such a plan should clearly explain how the proposed facilities operate and the functions they serve.
The name of the development, the name and address of the property
owner and applicant, and the name and address of the individual or
firm preparing the plan.
All adjacent property owners shall be notified of the project
and its stormwater and BMP installation. Legal proof of this notification
must be provided to the municipality.
A statement signed by the applicant acknowledging any revision
to the approved stormwater management plan and/or calculations must
be reviewed and approved by the Borough, PA DEP, and Allegheny County
Conservation District; in addition, a revised erosion and sedimentation
pollution control plan for a determination of adequacy.
A signature block for the design engineer (plan and calculations).
I, (name), on this date (date) hereby certify that the drainage
plan meets all the requirements, design standards, and criteria of
the Bradford Woods Stormwater Management Ordinance.
Stormwater management site plans approved by the municipality, in
accordance with this chapter, shall be on site throughout the duration
of the regulated activity.