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The purpose of this subchapter is to establish minimum stormwater management requirements and controls to protect and safeguard the general health, safety, and welfare of the public residing in watersheds within this jurisdiction. This subchapter seeks to meet that purpose through the following objectives:
(A) Minimize increases in stormwater runoff from any development located in separated sewer areas and discharging stormwater to a watercourse in order to reduce flooding, siltation, increases in stream temperature, and streambank erosion and maintain the integrity of stream channels.
(B) Minimize increases in nonpoint source pollution caused by stormwater runoff from any development located in separated sewer areas and discharging stormwater to a watercourse which would otherwise degrade local water quality.
(C) Minimize the total annual volume of surface water runoff which flows from any specific site during and following any development located in separated sewer areas and discharging stormwater to a watercourse to not exceed the pre-development hydrologic regime to the maximum extent practicable.
(D) Reduce stormwater runoff rates and volumes, soil erosion and nonpoint source pollution, wherever possible, through stormwater management controls and to ensure that these management controls are properly maintained and pose no threat to public safety.
(Ord. 1521, passed 2-7-2022)
(A) This subchapter shall be applicable to all development located in separated sewer areas and discharging stormwater to a watercourse, unless eligible for an exemption or granted a waiver by the City of Wyandotte under the specifications of § 52.062. The subchapter also applies to land development activities that are smaller than the minimum applicability criteria if such activities are part of a larger common plan of development that meets the following applicability criteria, even though multiple separate and distinct land development activities may take place at different times on different schedules.
(B) To prevent the adverse impacts of stormwater runoff, the city has developed a set of performance standards that must be met at all development sites. These standards apply to any construction activity disturbing one or more acres of land. The following activities may be exempt from these stormwater performance criteria:
(1) Construction of, and additions or modifications to, existing single-family and two-family residential structures.
(2) Construction of, and additions or modifications to, existing multiple unit residential structures that do not disturb more than one acre of land, provided they are not part of a larger common development plan.
(3) Developments that do not disturb more than one acre of land, provided they are not part of a larger common development plan.
(4) Repairs to any stormwater treatment practice deemed necessary by the City of Wyandotte Department of Engineering and Building.
(C) When a site development plan is submitted that qualifies as a redevelopment project as defined in § 52.060, unless the site development is exempt as described above, or receives a waiver in accordance with § 52.062, decisions on permitting and on-site stormwater requirements shall be governed by the Wayne County Stormwater Management Ordinance, Chapter 95 Stormwater Management of the Code of Ordinances of the Charter County of Wayne as amended (Enrolled Ordinance No. 2021-526a (August 19, 2021)); and the Wayne County Stormwater Management Administrative Rules, as amended, (Resolution No. 2021-526b (August 19, 2021)); and the most recent version of the Wayne County Stormwater Standards Manual, which will be collectively referred to as the Wayne County Stormwater Program.
(Ord. 1521, passed 2-7-2022)
This subchapter is not intended to interfere with, abrogate, or annul any other ordinance, rule or regulation, statute, or other provision of law. The requirements of this subchapter should be considered minimum requirements, and where any provision of this subchapter imposes restrictions different from those imposed by any other ordinance, rule or regulation, or other provision of law, whichever provisions are more restrictive or impose higher protective standards for human health or the environment shall be considered to take precedence.
(Ord. 1521, passed 2-7-2022)
The Wayne County Stormwater Program contains specifications and standards, including best management practices (BMP) which may be utilized by any development required to implement this subchapter. The Wayne County Stormwater Program may be updated and expanded from time to time, at the discretion of the County of Wayne, based on improvements in engineering, science, monitoring and local maintenance experience. Stormwater treatment practices that are designed and constructed in accordance with these design and sizing criteria will be presumed to meet the minimum water quality performance standards.
(Ord. 1521, passed 2-7-2022)
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