1. 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 Municipality in a format that is clear, concise, legible, neat and well organized; otherwise, the SWM site plan shall be rejected.
2. Appropriate Sections from the Municipal Subdivision and Land Development Ordinance [Chapter 22], and other applicable local ordinances, shall be followed in preparing the SWM site plan.
A. SWM site plan shall include (but not be limited to):
(1) Plans no larger then 24-inch x 36-inch sheets and in a form that meets the requirements for recording in the Office of the Recorder of Deeds of Dauphin County.
(2) 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, email address, and engineering seal of the individual preparing the SWM site plan.
(3) The date of submission and dates of all revisions.
(4) A graphical and written scale on all drawings and maps.
(5) A north arrow on all drawings and maps.
(6) A location map at a minimum scale of 1 inch equals 1,000 feet.
(7) Metes and bounds description of the entire tract perimeter.
(8) Existing and final contours at intervals of 2 feet.
(9) Existing waterbodies within the project area including streams, lakes, ponds, 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.
(10) The location of all existing and proposed utilities, on-lot wastewater facilities, water supply wells, sanitary sewers, and water lines on and within 50 feet of property lines.
(11) A key map showing all existing man-made features beyond the property boundary that may be affected by the project.
(12) Soil names and boundaries with identification of the hydraulic soil group classification.
(13) The proposed limit of disturbance line and associated proposed disturbed acres.
(14) Proposed structures, roads, paved areas, and buildings, including plans and profiles of roads and paved areas and floor elevations of buildings.
(15) Horizontal alignment, vertical profiles, and cross sections of all open channels, pipes, swales and other BMPs.
(16) The location and clear identification of the nature of permanent stormwater BMPs.
(17) A depiction of drainage boundaries for all permanent stormwater BMPs.
(18) The location of all erosion and sedimentation control facilities.
(19) A minimum 20-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 Municipality or their designees access to all easements via the nearest public right-of-way.
(20) Construction details for all drainage and stormwater BMPs.
(21) Construction details of any improvements made to sinkholes.
(22) Identification of short-term and long-term ownership, operations, and maintenance responsibilities.
(23) Notes and Statements.
(a) A statement, signed by the landowner, acknowledging that the stormwater BMPs are fixtures that cannot be altered or removed without prior approval by the Municipality.
(b) A statement referencing the Operation and Maintenance (O&M) Agreement and stating that the O&M Agreement is part of the SWM site plan.
(c) A note indicating that record drawings will be provided for all stormwater management facilities prior to occupancy, or the release of financial security.
(d) The following signature block for the qualified professional preparing the SWM site plan:
“I, ___________________, hereby certify that the Stormwater Management Plan meets all design standards and criteria of Dauphin Borough's Stormwater Management Ordinance.” |
B. SWM site report shall include (but not be limited to):
(1) 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, email address, and engineering seal of the individual preparing the SWM site report.
(2) Project description narrative including expected project time schedule.
(3) Location map showing the project site and its location relative to release rate districts.
(4) Drainage area maps for all watersheds (pre-development, post- development, swales, inlets, etc.), including depictions of the time of concentration flow paths.
(5) A detailed description of the existing site conditions. A detailed site evaluation shall be completed for projects proposed in areas of carbonate geology or karst topography, and other environmentally sensitive areas such as brownfields.
(6) Complete hydrologic, hydraulic and structural computations, calculations, assumptions, and criteria for the design of all stormwater BMPs.
(7) 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.
(8) Calculations showing the total drainage area and impervious area loading rates to each BMP.
(9) 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.
(10) Description of the proposed changes to the land surface and vegetative cover including the type and amount of impervious area to be added.
(11) All applicable worksheets from Chapter 8 of the BMP Manual when establishing volume controls.
(12) 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.
C. Supplemental information to be provided prior to recording of the SWM site plan, as applicable:
(1) Signed and executed operations and maintenance agreement (Appendix 23-A).
(2) Signed and executed easements, as required for all on-site and off-site work.
(3) An erosion and sedimentation control plan and approval letter from the Dauphin County Conservation District.
(4) An NPDES permit.
(5) Permits from PADEP and ACOE.
(6) A geologic assessment.
(7) A wetland delineation report.
(8) 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.
(Ord. 11-01, 2/8/2011, §802)