2016 024 Ordinance - Laserfiche WebLink

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~" "--- aevc: ~`° -J f.:- wtrcRSi.~n~ ~`~ jam- ~c.~~hr_rs 1-fay 2016 Ordinances regulating subdivisions, shall provide stormwater management and water quality controls for the development of all subdivided lots. This shall include provisions for lot grading and drainage that prevent structure flooding during the 100-year, 24-hour storm; and maintain, to the extent practicable, the pre-development runoff patterns, volumes, and peaks from each lot. 4. Stormwater facilities in water resources: SCMs and related activities shall not be constructed in water resources unless the applicant shows proof of compliance with all appropriate permits from the Ohio EPA, the U.S. Army Corps, and other applicable federal, state, and local agencies as required in Section 1128.07 of this regulation, and the activity is in compliance with Chapter 979: Erosion and Sediment Control and Chapter 1127 of the Village of Mayfield Codified Ordinances, all as determined by the Village Engineer. Stonnwater ponds and surface conveyance channels: All stonnwater pond and surface conveyance designs must provide a minimum of one (1) foot freeboard above the projected peak stage within the facility during the 100-year,, 24-hour storm. When designing stonnwater ponds and conveyance channels, the applicant shall consider public safety as a design factor and alternative designs must be implemented where site limitations would preclude a safe design. 6. Exemption: The site where soil-disturbing activities are conducted shall be exempt from the requirements of Section 1128.09 if it can be shown to the satisfaction of the Village Engineer that the site is part of a larger common plan of development where the stonnwater management requirements for the site are provided by an existing SCMs, or if the stormwater management requirements for the site are provided by practices defined in a regional or local stormwater management plan approved by the Village Engineer. 7. Maintenance: All SCMs shall be maintained in accordance with the Inspection and Maintenance Plan and Agreements approved by the Village Engineer as detailed in Section 1128.08. Ownership: Unless otherwise required by the Village of Mayfield, SCMs serving multiple lots in subdivisions shall be on a separate lot held and maintained by an entity of common ownership or, if compensated by the property owners, maybe maintained by the Village of Mayfield. SCMs serving single lots shall be placed on these lots, protected within an easement, and maintained by the property owner. 9. Preservation of Existing Natural Drainage: Practices that preserve and/or improve the existing natural drainage shall be used to the maximum extent practicable. Such practices may include minimizing site grading and compaction; protecting and/or restoring water resources, riparian areas, and existing vegetation and vegetative buffer strips; phasing of construction operations in order to minimize the amount of disturbed land at any one time, and designation of tree preservation areas or other protective clearing and grubbing practices; and maintaining unconcentrated stormwater runoff to and through these areas. Post-construction stormwater practices shall provide perpetual management of runoff quality and quantity so that a receiving stream's physical, chemical and biological characteristics are protected and ecological functions are maintained. 16