For all regulated activities not eligible for exemptions pursuant to § 190-5 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.
Suitable maps and drawings showing all existing natural and constructed drainage facilities affecting the subject property.
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.
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- 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 description of current and proposed ground cover and land use. The total area and percent impervious cover shall be noted.
A wetland delineation report for the project site with a location map identifying wetland areas if any were found.
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 shall show 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.
A plan of the erosion and sedimentation procedures to be utilized as required by local ordinance and state regulations.
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 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.
A North arrow, submission date, graphic scale and revision dates, as applicable, shall be included on each page of all plans submitted.
Complete delineation of the flow paths used for calculating the time of concentration for the predeveloped and post-developed conditions.
Construction details sufficient to completely express the intended stormwater design components consistent with this chapter.
A listing of all permits required for the site, providing the status of the permit application(s) and approval(s).
The plan contents shall include, but are not limited to:
Existing water bodies and channels (i.e., ponds, streams, etc.).
Flood boundaries (i.e., FEMA, project, etc.).
Geologic features (i.e., limestone, sinkholes, etc.).
Existing and proposed utilities.
Soil names and boundaries.
Test pit and/or boring locations.
Changes to land and soil cover, and indicate the amount of impervious cover.
Proposed structures/features (i.e., roads, buildings, etc.).
Topographic, man-made, and existing features extending 100 feet from the project's boundary.
Date of submission.
Access easement to all BMPs.
Location, details, and cross sections of all proposed BMPs.
Note(s) indicating who is responsible for maintenance of the proposed BMPs.
A statement signed by the applicant acknowledging that 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.
Final copies of all plans, specifications and reports shall also be submitted to the Borough in Adobe® PDF format.