For any of the activities regulated by this chapter and not eligible for the exemptions provided in § 174-12, the final approval of subdivision and/or land development plans, the issuance of any building or occupancy permit, or the commencement of any land disturbance activity, may not proceed until the applicant has received written approval of a SWM site plan from the Township.
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 Township in a format that is clear, concise, legible, neat, and well organized; otherwise, the SWM site plan shall be rejected. Appropriate sections from the Township Subdivision and Land Development Ordinance,[1] 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 than twenty-two-inch-by-thirty-six-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 and/or address of the property site; name, address, telephone number, and e-mail address of the applicant/owner of the property; and name, address, telephone number, e-mail address, and engineering seal and signature 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 one inch equals 1,000 feet.
(7) 
Metes and bounds description of the entire tract perimeter, existing and proposed easements, and rights-of-way.
(8) 
Existing and proposed contours at intervals of two feet.
(9) 
Existing water bodies 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), all sensitive environmental features, areas of natural vegetation to be preserved, the total extent of the upstream area draining through the site, and overland drainage paths.
(10) 
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, buildings, and other improvements 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. This information shall include the limits of design impervious area and, where applicable, modification of design for impervious area in excess of that specified.
(17) 
The location of all erosion and sedimentation control facilities.
(18) 
A minimum twenty-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 Township or its designees access to all easements via the nearest public right-of-way.
(19) 
Construction details for all drainage and stormwater BMPs. Where possible, guidance for modification of the design for additional impervious area shall be provided.
(20) 
Construction details of any improvements made to sinkholes.
(21) 
Identification of short-term and long-term ownership, operations, and maintenance responsibilities.
(22) 
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 Township.
(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 as-built survey plans will be provided for all stormwater management facilities prior to occupancy of land or structures, or the release of financial security for said facilities.
(d) 
The following signature block for the qualified professional preparing the SWM site plan:
"I, __________, hereby certify that the Stormwater Management Site Plan meets all design standards and criteria of the Township of Derry Stormwater Management Ordinance, Chapter 174."
(e) 
Refer to Appendix F for other required standard notes.[2]
[2]
Editor's Note: Appendix F is on file in the Township offices.
B. 
SWM site report shall include (but not be limited to):
(1) 
The name of the development; name and location and/or address of the property site; name, address, telephone number, and e-mail address of the applicant/owner of the property; and name, address, telephone number, e-mail address, and engineering seal and signature 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 and inlets depicting the time of concentration 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 operation and maintenance agreement (Appendix A).[3]
[3]
Editor's Note: Appendix A is on file in the Township offices.
(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 DCCD.
(4) 
A 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.
[1]
Editor's Note: See Ch. 185, Subdivision and Land Development.
A. 
The applicant shall submit the SWM site plan and report for the regulated activity.
B. 
Where the SWM site plan and report is part of a subdivision or land development plan submission to the Township, the applicant shall follow the procedures specified in Chapter 185, Article III. In all other cases, three copies of the SWM site plan and report shall be submitted to the Township and may be distributed as follows:
(1) 
Two copies for the Township accompanied by the requisite Township review fee, as specified in this chapter.
(2) 
One copy for the Township Engineer.
C. 
Additional copies shall be submitted as requested by the Township, Tri-County Regional Planning Commission, DCCD or PADEP.
D. 
A SWM site plan and report shall be accompanied by fees in the amounts as established from time to time by resolution of the Board of Supervisors, payable to the Township of Derry.
A. 
The Township shall require receipt of a complete SWM site plan and report as specified in this chapter. The Township shall review the SWM site plan and report for consistency with the purposes, requirements, and intent of this chapter.
B. 
The Township shall not approve any SWM site plan and report that is deficient in meeting the requirements of this chapter. At its sole discretion and in accordance with this article, when a SWM site plan and report is found to be deficient, the Township may disapprove the submission and require a resubmission, or in the case of minor deficiencies, the Township may accept submission of modifications.
C. 
The Township shall notify the applicant in writing within 45 calendar days whether the SWM site plan and report is approved or disapproved if the SWM site plan and report is not part of a subdivision or land development plan. If the SWM site plan and report involves a subdivision or land development plan, the timing shall follow the subdivision and land development process according to Chapter 185.
D. 
The Township of Derry Community Development Office shall not issue a building permit for any regulated activity if the SWM site plan and report has been found to be inconsistent with this chapter, as determined by the Township. In addition, all required permits from PADEP must be obtained prior to issuance of a building permit.
A modification to a submitted SWM site plan and report for a development site that involves a change in stormwater management facilities or techniques, or that involves the relocation or redesign of stormwater management facilities, or that is necessary because soil or other conditions are not as stated on the SWM site plan as determined by the Township, shall require a resubmission of the modified SWM site plan in accordance with this chapter.
A disapproved SWM site plan and report may be resubmitted, with the revisions addressing the Township's concerns documented in writing, to the Township in accordance with this chapter. The applicable Township review fee must accompany a resubmission of a disapproved SWM site plan and report.
A. 
From the time an application for approval of a SWM site plan and report is duly filed as provided in this chapter, and while such application is pending approval or disapproval, no change or amendment of this chapter or other governing ordinances shall affect the decision on such application adversely to the applicant unless otherwise required by law. The applicant shall be entitled to a decision in accordance with the provisions of the governing ordinances or plans as they stood at the time the application was duly filed. However, if an application is properly and finally denied, any subsequent application shall be subject to the intervening change in governing regulations.
B. 
The Township's approval of a SWM site plan and report authorizes the regulated activities contained in the SWM site plan for a maximum term of validity of five years following the date of approval. The Township may specify a term of validity shorter than five years in the approval for any specific SWM site plan. Terms of validity shall commence on the date the Township signs the approval for a SWM site plan. The five-year or other specified period shall be extended for the duration of any litigation, including appeals, which prevent the commencement or completion of the regulated activity and for the duration of any sewer or utility moratorium or prohibition which was imposed subsequent to the filing of an application for approval of a plan. In the event of an appeal filed by any party from the approval or disapproval of a plan, the five-year period shall be extended by the total time from the date the appeal was filed until a final order in such matter has been entered and all appeals have been concluded and any period for filing appeals or requests for consideration have expired; provided, however, no extension shall be based upon any water or sewer moratorium which was in effect as of the date of the filing of an application. If stormwater management facilities included in the approved SWM site plan have not been constructed, or if an as-built survey plan of these facilities has not been approved within this time, then the Township may consider the SWM site plan disapproved and may revoke any and all permits or approvals, unless the applicant has requested, with good cause, an extension thereof from the Township.
A. 
The applicant shall be responsible for providing as-built survey plans of all stormwater BMPs included in the approved SWM site plan. The as-built survey plan and an explanation of any discrepancies with the approved SWM site plan shall be submitted to the Township.
B. 
The as-built survey plan shall include a certification of completion signed by a qualified professional verifying that all permanent stormwater BMPs have been constructed according to the approved SWM site plan and report.
C. 
After receipt of the as-built survey plan and certification of completion, the Township shall conduct a final inspection.
D. 
As-built survey plans are not required for regulated activities that have not added more than 5,000 square feet of new impervious area to a site after the effective date of this chapter.