(A) Although not a requirement of this chapter, prior to proceeding with SWM site plan preparation and submission, the applicant is encouraged to request a pre-application meeting with the municipality’s Engineer and a staff member of the County Conservation District to discuss the plan concept and responsibility for submission of required documents and information.
(B) Appropriate sections of the municipality’s subdivision and land development ordinance (Chapter 153 of this code of ordinances), and other applicable ordinances of the municipality regarding subdivision and land development plan preparation and applicable plan requirements shall be followed in preparing all SWM site plans, regardless of whether or not a SWM site plan involves a subdivision and/or land development plan.
(C) The municipality shall not approve any SWM site plan that is deficient in meeting the requirements of this chapter. At its sole discretion, and in accordance with this subchapter, when a SWM site plan is found to be deficient, the municipality may either disapprove the submission, or, in the case of minor deficiencies, the municipality may accept the submission of a revised SWM site plan as noted in § 53.063.
(D) The following items shall be included in the SWM site plan:
(1) Provisions for permanent access and/or maintenance easements for all physical SWM BMPs, such as ponds and infiltration structures, as necessary to implement the operation and maintenance (O&M) plan discussed in division (D)(3)(i) below;
(2) The following signature blocks for the municipality and design engineer:
(Municipal Engineer), on this date (date of signature), has reviewed the SWM site plan and finds it to be consistent with the design standards and criteria of the North York Borough Stormwater Management Ordinance, Ord. 2013-2 (Chapter 53 of the code of ordinances). |
“(Design engineer), on this date (date of signature), hereby certifies that the SWM site plan meets all design standards and criteria of the North York Borough Stormwater Management Ordinance, Ord. 2013-2 (Chapter 53 of the code of ordinances)” |
(3) If not required by the municipal subdivision and land development ordinance (Chapter 153 of this code of ordinances), as specified in division (B) above, the SWM site plan shall also provide the following information where applicable:
(a) The overall stormwater management concept for the project, including any additional information required for a post-construction stormwater management plan (PCSWMP) as applicable;
(b) A determination of site conditions in accordance with the BMP Manual. A detailed site evaluation shall be completed for projects proposed in areas of carbonate geology or karst topography, as well as for other environmentally sensitive areas, whether natural or human-made, including, but not limited to, floodplains, streams, lakes, ponds, hydric soils, wetlands, brownfields and wellhead protection zones;
(c) Stormwater run-off design computations, and documentation as specified in this chapter, or as otherwise necessary to demonstrate that the maximum practicable measures have been taken to meet the requirements of this chapter, including the recommendations and general requirements in § 53.040;
(d) Expected project time schedule;
(e) A soil erosion and sediment control plan in accordance with the following:
1. Earth disturbance, zero to 5,000 square feet, implement erosion and sediment control measures on site, a written erosion and sediment control plan and County Conservation District approval is not required unless required by state and/or federal permit(s) or is deemed necessary by the municipality. If earth disturbance is in a high quality or exceptional value watershed then a written erosion and sediment control plan and YCCD approval is required;
2. Earth disturbance, 5,001 square feet to less than one acre, a written erosion and sediment control plan and implementation of plan on site is required. YCCD approval may be required by the municipality or state and/or federal permit(s). If earth disturbance is in a high quality or exceptional value watershed than YCCD approval is required;
3. Earth disturbance, one acre or greater, a written erosion and sediment control plan, YCCD approval and implementation of plan on site is required; and
4. In addition, under 25 Pa. Code Chapter 92, an individual or general, as applicable, DEP “NPDES construction activities” permit is required for regulated earth disturbance activities of one acre or greater.
(f) The effect of the project in terms of run-off 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;
(g) Plan and profile drawings of all SWM BMPs, including, but not limited to, drainage structures, pipes, open channels and swales;
(h) The SWM site plan shall show the locations of existing and proposed on-lot wastewater facilities and water supply wells;
(i) The SWM site plan shall include an operation and maintenance (O&M) plan for all existing and proposed physical stormwater management facilities. This plan shall address long-term ownership and responsibilities for O&M as well as schedules and costs for O&M activities. This (O&M) plan may be part of the SWM site plan or may be a separate recorded document;
(j) A description of permanent stormwater management techniques, including the construction specifications of the materials to be used for stormwater management facilities;
(k) A notarized signature of the owner of the parcel for which the SWM site plan is proposed;
(l) Existing and proposed land uses;
(m) The location of the proposed regulated activity relative to streets, municipal boundaries and other significant human-made features;
(n) Significant physical features and associated boundary limits including flood hazard areas, sinkholes, existing drainage courses and areas of natural vegetation;
(o) The location of existing and proposed utilities, stormwater facilities, sanitary sewers and water lines on the parcel and within 50 feet of property lines;
(p) Proposed changes to the land surface and vegetative cover, and the type and amount of existing and proposed impervious area;
(q) Existing and proposed features, such as, structures, buildings, streets, driveways, access drives and parking areas;
(r) Contour intervals of two feet or less. Dependent upon site conditions, alternative contour intervals proposed by an applicant or his or her designee may be accepted by the municipality;
(s) The name of the development, the name and address of the owner of the property, and the name and address of the individual or firm preparing the plan. Also to be included are the name, address, signature and seal of any registered surveyor (attesting the accuracy of the boundary survey), professional engineer, landscape architect or professional geologist (for geomorphological assessments) contributing to and/or with a responsibility for any aspect of the plan where applicable;
(t) Preferred graphic and written scale of one inch equals no more than 50 feet. Dependent upon site conditions, an alternative scale proposed by the applicant or his or her designee may be accepted by the municipality;
(u) North point (arrow);
(v) A map showing all existing human-made features beyond the subject parcel’s boundary lines that will be affected by the proposed regulated activities;
(w) Horizontal and vertical cross-sections of all open channels, including hydraulic capacity;
(x) A note on the plan indicating the location, and responsibility for maintenance of, SWM facilities and/or easements that would be located on adjoining properties as a result of proposed regulated activities, and the location of such facilities and/or easements;
(y) A hydro-geologic assessment of the effects of stormwater run-off on sinkholes where present;
(z) The effect of the proposed regulated activity in terms of run-off volumes and peak flows on adjacent properties and/or any existing municipal stormwater collection system that may receive run-off from the project site;
(aa) Drainage flow pathways; and
(bb) Infiltration testing performed in accordance with the BMP Manual shall be completed and the test results provided for any proposed infiltration BMPs.
(E) Simplified SWM site plan:
(1) The simplified site plan shall require a drawing showing:
(a) The location and dimensions of the proposed new impervious surface, property lines, significant natural and human-made features within the project site;
(b) The approximate location and dimensions of all, other impervious surfaces within the project site identifying those placed after the date of the enactment of this chapter;
(c) The location of all wells and sewage disposal systems located within the project site; and
(d) The direction of stormwater flow from the existing impervious surfaces within the project site. The direction of stormwater flow from the proposed impervious surfaces within the project site. The general flow patterns across the project site.
(2) The simplified site plan shall require a proposal to manage the stormwater flow from the proposed impervious surfaces. The proposal may involve:
(a) The maintenance of a pervious flow area constructed consistent with the requirements of a DIA as set forth in Appendix B of this chapter, or if the requirements of Appendix B cannot be met, then an equivalent DIA, may be authorized by the borough; and
(b) The construction and maintenance of:
1. Stormwater pits approved by the borough’s Engineer as designed and sized to manage proposed increases in stormwater flow from the project site brought about by the proposed impervious surface. Infiltration tests to establish the size of pit(s) necessary to achieve compliance with this chapter may be required by the borough; or
2. A detention basin approved by the borough’s Engineer as designed and sized to manage proposed increases in stormwater flow from the project site brought about by the proposed impervious surface. Infiltration tests to establish the size of basins necessary to achieve compliance with this chapter may be required by the borough.
(c) Any other proposal approved by the borough engineer or the borough enforcement officer as sufficient to manage the increase in stormwater run-off brought about by the regulated activity.
(Ord. 2013-2, passed 10-7-2013)