§ 156.41   USE RESTRICTIONS AND MODIFICATIONS.
   (A)   Restrictions.  Wherever property is proposed for subdividing with the intention that it shall have a use different than that designated in Chapter 157 of this code, that use shall be stated in an application for an amendment to Chapter 157 or in a separate statement filed with the Planning Commission.  Conformance with the objectives of the land use plan shall be required so as to ensure general uniformity of land uses within blocks and neighborhoods.
   (B)   Conformance with zoning ordinance.  Property use and area restrictions must be in accordance with Chapter 157 of this code.
   (C)   Business or commercial lots.  Business or commercial lots, when platted, shall bear a reasonable relation in number to the probable number of families constituting the purchasing power of the surrounding tributary area.  The Planning Commission shall recommend the location of business and commercial lots in accordance with the land use plan and Chapter 157 of this code.
   (D)   Commercial or industrial modification.  These subdivision design standards may be modified in accordance with §§ 156.55et seq. of this code in the case of subdivision specifically for commercial or industrial development, including shopping districts, wholesaling areas, and planned industrial districts.  In all cases, however, adequate provisions shall be made for off-street parking and loading areas as well as for traffic circulation.
   (E)   Subject to flooding.  Any areas within the proposed plat which are subject to flooding, inundation by storm water, or within the floodplain of a river, stream, creek, or lake, or have inadequate drainage shall not be platted for any use so as to increase danger to life, health, or property.  If the City Council determines that a flood problem does exist, then it shall reject all or part of the proposed plat lying within the floodplain or area subject to flooding.  Areas of land lying within a floodplain shall require compliance with the Subdivision Control Act and review by the State Department of Natural Resources.  The proprietor may show by engineering site plans that a change in the topography will eliminate flooding and shall demonstrate that any planned topographical change will not aggravate the flood hazard beyond the limits of the plat.
   (F)   Public sites and open spaces.
      (1)   Where a site for a park, playground, playfield, school, library, fire station, or other public use is deemed necessary by the Planning Commission to fulfill the objectives of the land use plan, the Commission may recommend the reservation of those areas within the subdivisions.
         (a)   Upon determination by the respective public agency that space for the public facility is required, the agency involved shall, within 90 days, enter into an agreement to purchase the site.
         (b)   Acquisition of the site shall be accomplished within 3 years.
      (2)   Reservation of other public open spaces may be required where deemed necessary by the Planning Commission for preservation of historic sites and scenic areas or for a particular type of development proposed in the subdivision but not anticipated in the land use plan.
      (3)   Dedication of planting strips or buffer parks may be required by the Planning Commission in areas where it deems it desirable to separate and protect residential subdivisions from adjacent commercial developments, highways, streets, and railroads, or any obnoxious use.  These strips shall be a minimum of 20 feet wide and shall not be a part of the normal roadway right-of-way or utility easement.
   (G)   Reserve strips.
      (1)   Private reserve strips.  Privately held reserve strips controlling access to streets shall be prohibited.
      (2)   Public reserve strips.  A 1-foot reserve may be required to be placed at the end of dead-end streets which terminate at subdivision boundaries and between half-streets.  These reserves shall be deeded in fee simple to the city for future street purposes.
   (H)   Protection of natural features.  Due regard shall be shown for all natural features, such as large trees, exceptionally fine groves of trees, watercourses, scenic points, historic spots, and similar community assets, which, if preserved, will add attractiveness and value to the subdivision.