The following regulations shall apply to the design of wet and dry stormwater basins:
(a) Wet and dry stormwater basins shall be designed by an Engineer in conjunction with a professional engineer to ensure that the basins have a natural shape and are graded and planted in an attractive manner.
(b) Wet and dry stormwater basins shall be designed in compliance with the ODNR Rainwater and Land Development Manual, latest edition, to meet water quality requirements.
(c) For safety, maintenance, and aesthetic purposes, wet and dry stormwater basins shall have side slopes (above normal pool elevation) that are generally no steeper than 6:1 and no more gradual than 20:1 (horizontal:vertical).
(d) The use of fountains and other plainly visible aeration devices shall be subject to the approval of the City Engineer.
(e) Landscape treatments at the perimeter of wet and dry stormwater basins shall be designed either with maintained turf to the pond's edge or a naturalized planting of native landscape material, subject to approval of the City Engineer. The landscape plantings shall be in large masses and drifts, and shall not include decorative landscape boulders, large mulch beds, or specimen plantings. Under no circumstances shall the landscape design conflict with any of the safety, maintenance, or engineering requirements set forth in the Codified Ordinances or reference documents.
(f) Temporary on-site wet or dry stormwater basins shall not be subject to the regulations in divisions (a), (b), (c) and (e) of this section. Temporary basins shall either be removed or replaced with a permanent basin prior to acceptance of infrastructure improvements when installed as part of new subdivisions or completion of the final engineering punch list in the case of single site developments. The time frame in which to install a permanent basin may be extended for good cause by the City Manager or their designee. In the case of a time extension, a performance bond must be provided to the City in an amount to cover removal of the temporary basin and installation of the permanent basin. State and Federal safety and engineering regulations apply to all temporary ponds.
(Ord. 08-2022. Passed 5-4-22.)