Ord #248 - 3rd Ser/Amending the code of Ordinances pertaining to subdivisions

Home Browse Search

a. Where a public storm sewer is accessible,the subdivider shall install storm sewer facilities; or, if no outlets are within a reasonable distance, adequate provision shall be made for the disposal of stormwaters, subject to the specifications of the city. b. If a connection to a public storm sewer will be provided eventually, as determined by the city, the subdivider shall make arrangements for future stormwater disposal by a public utility system at the time the subdivision receives final approval. Provision for such connection shall be incorporated by inclusion in the performance Bond required for the final subdivision. (3) Accommodation of upstream drainage areas. A culvert or other drainage facility shall in each case be large enough to accommodate potential runoff from its entire upstream drainage area, whether inside or outside the subdivision. The city shall determine the necessary size of the facility, based on the provisions of the construction standards and specifications assuming conditions of maximum potential watershed development permitted by chapter 78 and Community Management Plan. (4) Effect on downstream drainage areas. The city shall also study the effect of each plat on existing downstream drainage facilities outside the area of the plat. City drainage studies, together with such other studies as shall be appropriate, shall serve as a guide to needed improvements. Where it is anticipated that the additional runoff incident to the development of the plat will overload an existing downstream drainage facility,the city may withhold approval of the plat until provision has been made for the improvement of the potential condition at the subdivider's expense and in such sum as the city shall determine.No plat shall be approved unless adequate drainage will be provided to an adequate drainage watercourse or facility. (5) Floodplain areas. The city may, when it deems it necessary for the health, safety or welfare of the population of the area and necessary to the conservation of water, drainage and sanitary facilities,prohibit the subdivision of any portion of the property which lies within the floodplain of any stream, lake or drainage course. These floodplain areas shall be preserved from any and all destruction or damage resulting from clearing,grading or dumping of earth,waste material or stumps by the appropriate conservation easement. (c) Dedication of drainage easements. (1) General requirements. Where a plat is traversed by a wetlands, swamp, watercourse, drainageway,channel or stream,there shall be provided a stormwater easement,conservation and flowage easement, or drainage right-of-way conforming substantially to the lines of such watercourse, and of such width and construction or both as will be adequate for the purpose. Wherever possible, it is desirable that the drainage be maintained by an open channel with landscaped banks and adequate width for maximum potential volume of flow. (2) Drainage easements. a. Where topography or other conditions are such as to make impractical the inclusion of drainage facilities within road rights-of-way, perpetual unobstructed easements of an appropriate width for such drainage facilities shall be provided across property outside the road lines and with satisfactory access to a public roadway. Easements shall be indicated on the plat. Drainage easements shall be carried from the road to a natural watercourse or to other drainage facilities. b. When a proposed drainage system will carry water across private land outside the plat, appropriate drainage rights must be secured and indicated. c. The subdivider shall dedicate,by drainage or conservation easement of land on both sides of existing watercourses,to a distance to be determined by the city. Final Draft page 25