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Neshaminy Act 167 Ordinance

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Neshaminy Act 167 Ordinance NESHAMINY CREEK WATERSHED ACT 167 STORMWATER MANAGEMENT ORDINANCE Implementing the requirements of the Neshaminy Creek Watershed Act 167 Stormwater Management Plan (includes Little Neshaminy Creek Watershed) ORDINANCE NO.________ WARMINSTER TOWNSHIP, BUCKS COUNTY, PENNSYLVANIA Adopted at a Public Meeting Held on __________________, 20__ - 1 - TABLE OF CONTENTS PAGE ARTICLE I. GENERAL PROVISIONS............................................................................. 4 §101. Short Title......................................................................................................... 4 §102. Statement of Findings....................................................................................... 4 §103. Purpose............................................................................................................ 5 §104. Statutory Authority............................................................................................ 5 §105. Applicability/Regulated Activities ...................................................................... 6 §106. Exemptions ...................................................................................................... 6 §107. Repealer........................................................................................................... 8 §108. Severability....................................................................................................... 8 §109. Compatibility with Other Ordinance or Legal Requirements.............................. 8 ARTICLE II. DEFINITIONS ............................................................................................. 9 §201. Interpretation .................................................................................................... 9 §202. Definitions ........................................................................................................ 9 ARTICLE III. STORMWATER MANAGEMENT............................................................. 21 §301. General Requirements ................................................................................... 21 §302. Permit Requirements by Other Governmental Entities.................................... 23 §303. Volume Control............................................................................................... 23 §304. Stormwater Peak Rate Control and Management Districts............................. 26 §305. Calculation Methodology ................................................................................ 27 §306. Best Management Practice (BMP) Design and Construction Criteria.............. 32 §307. Other Requirements ....................................................................................... 32 ARTICLE IV. STORMWATER MANAGEMENT (SWM) SITE PLAN REQUIREMENTS 33 §401. General Requirements ................................................................................... 33 §402. SWM Site Plan Requirements ........................................................................ 33 §403. Plan Submission............................................................................................. 36 §404. Stormwater Management (SWM) Site Plan Review........................................ 37 §405. Modification of Plans ...................................................................................... 37 §406. Resubmission of Disapproved SWM Site Plans.............................................. 38 §407. Authorization to Construct and Term of Validity.............................................. 38 ARTICLE V. INSPECTIONS ......................................................................................... 39 §501. Inspections.................................................................................................... 39 ARTICLE VI. FEES AND EXPENSES........................................................................... 41 §601. Municipal Stormwater Management (SWM) Site Plan Review and Inspection Fee ............................................................................................................ 41 §602. Expenses Covered by Fees ........................................................................... 41 ARTICLE VII. MAINTENANCE RESPONSIBILITIES .................................................... 42 §701. Performance Guarantee................................................................................. 42 §702. Maintenance Responsibility and Guarantees.................................................. 43 §703. Responsibilities for Operations and Maintenance (O&M) of Stormwater Facilities and BMPs.................................................................................................... 45 §704. Municipal Review of Stormwater Facilities and BMP Operations and Maintenance (O&M) Plan .......................................................................................... 47 - 2 - §705. Operations and Maintenance (O&M) Agreement for Privately Owned Stormwater Facilities and BMPs.............................................................................. 47 §706. Stormwater Management Easements............................................................. 48 ARTICLE VIII. PROHIBITIONS ..................................................................................... 49 §801. Prohibited Discharges .............................................................................. 49 §802. Prohibited Connections .................................................................................. 49 §803. Roof Drains .................................................................................................... 50 §804. Alteration of SWM BMPs ................................................................................ 50 ARTICLE IX. ENFORCEMENT AND PENALTIES ........................................................ 51 §901. Right-of-Entry ................................................................................................. 51 §902. Inspection....................................................................................................... 51 §903. Enforcement................................................................................................... 51 §904. Suspension and Revocation of Permits and Approvals................................... 52 §905. Penalties ........................................................................................................ 52 §906. Appeals .......................................................................................................... 53 NESHAMINY CREEK WATERSHED STORMWATER MANAGEMENT PLAN ORDINANCE ENACTMENT................................................................................................................ 54 APPENDIX A: SOIL TESTING REQUIREMENTS......................................................... 55 TABLES Table 106.1 Impervious Surface Exemption Thresholds for the Neshaminy Creek Watershed ....................................................................................................................................... 7 Table 304.1 Peak Rate Runoff Control Standards in the Neshaminy Creek Watershed 27 Table 305.1 Acceptable Computation Methodologies for Stormwater Management Plans ..................................................................................................................................... 28 Table 305.2 Roughness Coefficients (Manning's "n") For Overland Flow...................... 30 Table 305.3 Roughness Coefficients (Manning's "n") For Channel Flow ....................... 30 Table 305.4 Rational Runoff Coefficients ...................................................................... 31 - 3 - ARTICLE I. GENERAL PROVISIONS §101. Short Title This Ordinance shall be known and may be cited as the “Neshaminy Creek Watershed Stormwater Management Ordinance” (a.k.a. Neshaminy/Little Neshaminy Stormwater Management Ordinance). §102. Statement of Findings The Board of Supervisors of Warminster Township finds that: A. Inadequate management of accelerated stormwater runoff resulting from development and redevelopment throughout a watershed increases flood flows and velocities, contributes to erosion and sedimentation, overtaxes the carrying capacity of streams and storm sewers, greatly increases the cost of public facilities to convey and manage stormwater, undermines floodplain management and flood reduction efforts in upstream and downstream communities, reduces groundwater recharge, and threatens public health and safety. B. Inadequate planning and management of stormwater runoff resulting from land development and redevelopment throughout a watershed can also harm surface water resources by changing the natural hydrologic patterns, accelerating stream flows (which increase scour and erosion of streambeds and streambanks, thereby elevating sedimentation), destroying aquatic habitat, and elevating aquatic pollutant concentrations and loadings such as sediments, nutrients, heavy metals, and pathogens. C. A comprehensive program of stormwater management (SWM), including reasonable regulation of development and activities causing accelerated runoff, is fundamental to the public health, safety, welfare, and the protection of the people of Warminster Township and all the people of the Commonwealth, their resources, and the environment. D. Stormwater is an important water resource by providing groundwater recharge for water supplies and base flow of streams, which also protects and maintains surface water quality. E. Public education on the control of pollution
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