1199.07 STORM DRAINAGE SYSTEM.
(a) Every development shall be provided with a storm system that provides adequate, complete, and satisfactory drainage service for the entire area being platted for all projected land uses and otherwise meeting the approval of the governmental officials having jurisdiction over the same. The system shall provide for drainage of the entire area of each and every lot. The drawing plans and specifications for such system, when approved by the Director of Engineering, shall be known as the Official Drainage Plan for the development.
(b) The Official Drainage Plan shall not be revised or altered without the approval and endorsement of the Director of Engineering. The Subdivider shall certify that all grading and drainage facilities will be completed in conformance with the Official Drainage Plan and the Subdivider’s engineer shall certify that the drainage system has been designed to provide complete and adequate storm drainage service for the entire area being platted.
(c) The Official Drainage Plan may be altered or revised, as long as adequate and satisfactory facilities are provided. Any person requesting an alteration or revision must file a written request with the Director of Engineering and all owners affected by the change. The request shall include an explanation and plan in sufficient detail to adequately review the requested alteration or revision. Any change must be approved by the Director of Engineering and be endorsed by him on the Official Drainage Plan, after consideration of the views of all affected parties. Any owner that takes any action not in conformance with the Official Drainage Plan shall be liable for any resulting damage and responsible for any corrective work necessary to conform to the Official Drainage Plan, including approved revisions.
(d) Continuous or intermittent drainage flow (from springs, ground water, seepage, foundation drains, yard drains, etc.) shall be disposed of by piping to a storm sewer or stream with continuous or intermittent flow and shall not be disposed of by draining to the sanitary sewer system, street gutter, or to an open ditch or swale that is without flow during dry periods. Where gravity flow is possible for foundation drains, such flow can outlet to any stream or swale, except minor lot swales. The Director of Engineering shall evaluate the possibility or occurrence of such situations in the design of the drainage plan and provide whatever drainage facilities are needed.
(e) The Subdivider and the Subdivider’s engineer shall take all necessary and proper design and construction measures and precautions to control and prevent the slippage of hillsides, slope instability, obstruction of sewers and drainage, stagnation, erosion and sedimentation. The City, in accordance with its Building Code provisions, shall supervise and control work by builders and lot owners to ensure that these provisions are complied with. The Subdivider shall include the requirement for minor lot swale work in applicable conveyances to each buyer and shall cooperate with and assist the City in having this work completed in conformance with the Official Drainage Plan.
(f) The Official Drainage Plan reference in Section 1199.07(a) shall be attached to, incorporated by reference, and filed with the Final Plat of the subdivision or development in the Office of the Recorder of Butler County, Ohio when such Final Plat is so recorded. The Subdivider of the subdivision or other development shall thereafter include in each deed for the conveyance of such subdivision or development, or any portion thereof, a covenant making such conveyance subject to the terms and conditions of the aforementioned Official Drainage Plan. The covenant shall contain language that will cause the same to run with the land and inure to the benefit of the City of Hamilton and the owner(s) of any parcel of land within such subdivision or development. Alternatively, the covenant may be recorded in a separate instrument setting forth the covenant in such a manner that all subsequent conveyances shall be subject to the covenant.
(g) For the purposes of Maintenance of Detention and Retention Facilities, the Subdivider shall submit to the City for review at the time of submission of the Final Plat a copy of the Homeowners Association Declaration, Bylaws, Covenants and Restrictions that outlines the responsibilities of the Homeowners Associations with respect to the continued maintenance of detention and retention facilities and their control structures, and other communal open space. No final plat shall be approved by the planning commission without this submission and its approval by the appropriate city departments.
(h) Sump Pump Connector Main. A Sump Pump Connector Main is required to be installed one foot behind the back of curb and connect to a downstream catch basin or storm sewer manhole. Cleanouts shall be installed at the terminus ends of the Sump Pump Connector Main and shall not exceed 400-foot spacing. The Sump Pump Connector Main shall be a minimum of eight (8) inches in diameter and have a minimum slope of five-tenths percent (0.5%). The pipe shall be constructed of SDR35 or an equivalent material. Standard “Ys” or “Ts”shall be installed ten (10) feet from the downhill property line of each. All sump pumps shall be connected to a catch basin or to a Sump Pump Connector Main, unless written approval for an alternative method of discharge is granted by the Director of Engineering or his designee.
(Ord. 2021-5-30. Passed 5-12-21.)