(A) Suitability of land. No land shall be subdivided for residential use if such land is considered by the Commission to be unsuitable for such use by reason of flooding or improper drainage, objectional earth, and rock formation topography, or any other feature harmful to the health and safety of possible residents and the community as a whole.
(B) Development thoroughfare plan. All proposed subdivisions shall conform to the Development Thoroughfare Plan. Whenever a tract to be subdivided embraces any part of a major street, boulevard, or parkway so designated on the Thoroughfare Plan, such part of such proposed public way shall be platted by the subdivider in the locations and of the width indicated on the Thoroughfare Plan. Due consideration shall also be given by the subdivider and the owners of adjoining property for the provision of school sites, park sites, rights-of-way for public utility lines, sites for business centers, industrial locations, and other features as indicated on the Master Plan.
(C) Street and alley location and arrangement.
(1) The street and alley layout shall conform to the Neighborhood Plan of the commission, if such Plan has been adopted as part of the Master Plan, for the development of the neighborhood in which the proposed subdivision is located.
(2) Proposed streets shall be adjusted to the contour of the land so as to produce usable lots and streets of reasonable gradient.
(3) Wherever there exists a dedicated or platted subdivision of a street or alley adjacent to the tract to be subdivided, the other portion of the street or alley to the prescribed width shall be platted.
(D) Minimum street and alley widths, right-of-way.
(1) Major streets shall have widths not less than indicated on the Thoroughfare Plan.
(2) Streets in the Business Districts designated by the zoning ordinance shall have widths not less than 80 feet.
(3) Other streets shall have widths not less than 50 feet.
(4) Alleys shall have widths not less than 20 feet or more than 30 feet.
(5) Dead end streets, 50 feet. All dead end streets shall not exceed 600 feet in length and shall terminate in a circular right-of-way within a minimum diameter of 80 feet, unless the Commission approves an equally safe and convenient form of space instead of the required turning circle.
(E) Minimum radii of curvature on centerlines. Where a deflection angle of more than ten degrees in the alignment of a street occurs, a curve shall be introduced, providing for:
(1) Major streets, a minimum radius of 300 feet, but should be much greater wherever possible; and
(2) Other streets, a minimum radius of 100 feet, but should be much greater wherever possible.
(F) Tangents. Between reversed curves there shall not be less than a minimum tangent for:
(1) Major streets, of 200 feet; and
(2) Other streets, of 50 feet.
(G) Intersections.
(1) At street intersections, property line corners shall be rounded by an arc at least 20 feet in radius.
(2) All streets intersecting a major street shall do so at right angles or as nearly as is possible. If the intersection angle is less than 60 degrees, the foregoing radii shall be increased not less than 40%.
(H) Blocks.
(1) The width of blocks shall be sufficient to allow two tiers of lots as described in divisions (I)(1) and (I)(2) below.
(2) Blocks shall not exceed 1,320 feet in length.
(3) In blocks over 750 feet in length, the Commission may require, at or near the middle of the block, public walk connection adjacent streets, or other public areas, and such walkway shall be at least ten feet in width and shall be intended for the use of pedestrians only.
(I) Lots.
(1) In any Agricultural or Residence District the minimum width and area for lots shall conform to the requirements of the zoning ordinance, but in no case shall the width be less than 60 feet at the set back line and the area contain less than 6,000 square feet if a public water supply and sanitary sewers are provided; 8,000 square feet if a public water supply, but no sanitary sewers, are provided; and 10,000 square feet if neither a public water supply nor sanitary sewers are provided. Where property is located in a Business or Manufacturing District, the minimum permissible lot size and frontage shall be at the discretion of the Commission.
(2) The depth-to-width ration of the usable area of a lot shall not be greater than 3.5 to 1.0.
(3) Building set back lines shall not be less than those required by the zoning ordinance.
(4) Whenever possible, side lines of lots shall be at right angles or radial to street lines.
(5) Every lot shall abut on a street.
(6) Through lots having frontage on two parallel, or approximately parallel, streets will be permitted only at the discretion of the Commission.
(7) Except where alleys are provided for the purpose, each lot shall have an easement for utilities along the rear lot line and along the side lot line where necessary. No easement shall be less than six feet wide on each lot, making an overall easement width of 12 feet.
(8) When the terrain so requires, easements for the sanitary sewers along lot lines, other than the rear lot lines, shall be provided.
(J) Public spaces. Whenever a park, recreation area, school site, or other open space shown on the Master Plan is located in whole or in part in the proposed subdivision, the Commission may require the dedication of those spaces of their reservation for a period of not more than one year after the approval of the proposed subdivision.
(K) Monuments and markers.
(1) Monuments shall be concrete with a diameter of not less than six inches and 36 inches long, case in place, with a copper dowel three-eighths inch in diameter, at least two and one-half feet in length imbedded so that the top of the dowel shall not be more than one-fourth inch above the surface at the center of the monument.
(2) Monuments shall be set so that the top is level with the established grade adjoining it and placed so that the marked point on the metal center shall coincide exactly with the intersection of street property lines, the intersection of all angles in the boundary line and at the beginning and ending of all curves along streets, and at the center of the monument.
(3) Lot corners not marked by concrete monuments, as required above, shall be marked by galvanized or wrought iron pipe, or iron or steel bars at least three feet in length and not less than five-eights inch in diameter, the top of the pipe or bar to be set level with the established grade of the ground adjoining it.
(Prior Code, § 8.4.1) Penalty, see § 153.99