§ 16-9 — Rural subdivisions

§ 16-9. - Rural subdivisions.

(a) The development of rural acreage subdivisions with one-acre or larger lots, must be carried out in such a manner that surface water and runoff from each lot will flow to a roadway side ditch, swale, channel, or natural creek. Prior to final plat or building permit approval the developer must provide the City Engineer detailed construction plans showing channel and roadway side ditch sizes, grades, elevation, and driveway pipe sizes as well as erosion control measures necessary to prevent erosion of the proposed channel or ditch construction designed by an Engineer. These drainage improvements must include but not be limited to sodding, channel lining or ditch checks as required to prevent erosion of the proposed or existing channel or ditch. These drainage improvements are the responsibility of the developer to construct and if public, must be installed and inspected by the City prior to the acceptance of the streets and dedications on the final plat. Should the rural subdivision be constructed with private streets, then the developer and property owners will be responsible for construction and maintenance of the roadway side ditch. (b) The sizing of roadway side ditches and driveway pipes will be designed to provide for the runoff from fully developed land of a 25-year frequency storm. Surface water collected in roadway side ditches must be directed to a secondary drainage channel not located within the street right- of-way as often as the terrain will allow. Driveway pipe culvert schedules, elevations, sizes, and grades must be provided for all rural subdivisions and submitted for approval on the paving plans. (c) The sizing of channels, creeks, and any drainage improvements that are needed for street crossings will be designed in accordance with the requirements of the DCM and this chapter. (d) Site drainage improvements must provide for the grading of all building pads to an elevation that will not be subject to overflow from a 100-year frequency flood plus one foot of freeboard and in a manner that will provide for the rapid runoff of stormwater. Substantial improvements to existing buildings and structures within the 100-year frequency floodplain are subject to all regulations and the requirements of this chapter. The areas projected for inundation by the 100-year frequency flood must remain free of all buildings and structures and must be preserved in as natural a condition as possible. The maintenance of channels serving drainage areas of less than 500 acres are the responsibility of the property owner, the adjoining or abutting property owner or owners, or a duly constituted Property Owners Association or Homeowners Association unless such improvements are in a dedicated drainage easement and the drainage easement and channels formally accepted for ownership and maintenance by the City Council. Drainage areas containing more than 500 acres must be improved as outlined in Section 16-6, Primary Drainage Channels and constructed in accordance with this chapter and the DCM.

(Ord. No. 27691, § 2, 9-24-24)