(A) Streets.
(1) The arrangement, character, extent, width, grade and location of all streets shall be considered in their relation to existing and planned streets, topographical conditions, to public convenience and safety, and in their appropriate relation to the proposed uses of the land to be served by such streets.
(2) The arrangement of streets in a subdivision shall either:
(a) Provide for the continuation or appropriate projection of existing principal streets in surrounding area; or
(b) Meet a particular situation where topographical or other conditions make continuance or conformance to existing streets impracticable.
(3) Minor streets shall be so laid out that their use by through traffic will be discouraged.
(4) Where a subdivision abuts or contains an existing or proposed arterial street, the Plat Officer may require marginal access streets reverse frontage with screen planting contained in a non-access reservation along the rear property line, deep lots with rear service alleys, or such other treatment as may be necessary for adequate protection of residential properties and to afford separation of through and local traffic.
(5) Where a subdivision borders on or contains a railroad right-of-way or limited access highway right-of-way, the Plat Officer may require a street approximately parallel to and on each side of such right-of-way, at a distance suitable for the appropriate use of the intervening land, as for park purposes in residential districts, or for commercial or industrial purposes in appropriate districts. Such distances shall also be determined with due regard for the requirements of approach grades and future grade separations.
(6) Reserve strips controlling access to streets shall be prohibited, except where their control is definitely placed in the city under conditions approved by the Plat Officer.
(7) Street jogs with centerline offsets of less than 125 feet shall be avoided.
(8) A tangent at least 100 feet long shall be introduced between reverse curves on arterial and collector streets.
(9) When connecting street lines deflect from each other at any one point by more than ten degrees, they shall be connected by a curve with a radius adequate to ensure a sight distance of not less than 100 feet for minor and collector streets, and of such greater radii as the Plat Officer shall determine for special cases.
(10) Streets shall be laid out so as to intersect as nearly as possible at right angles and no street shall intersect any other street at less than 60 degrees.
(11) Property lines at street intersections shall be rounded with a radius of 15 feet, or of a greater radius where the Plat Officer may deem it necessary. The Plat Officer may permit comparable cutoffs or chords in place of rounded corners. Surface grading at street intersections shall be such as to permit unobstructed vision within the sight triangle formed by the center of intersection and two points 75 feet distant, each point being on the centerline of an intersecting street.
(12) Minimum street right-of-way widths shall be as follows:
Street Type | Right-of-Way (in feet) |
Arterial | As required by State Highway Department |
Collector | 60 |
Minor, for multiple residences | 60 |
Minor for other residences | 50 |
Marginal access | 40 |
(13) Half streets shall be prohibited, except where essential to the reasonable development of the subdivision in conformity with other requirements of these regulations; and where the Plat Officer finds it will be practicable to require the dedication of the other half when the adjoining property is subdivided. Wherever a half street is adjacent to a tract to be subdivided, the other half of the street shall be platted within such tract.
(14) Dead-end streets, designed to be so permanently shall not be longer than 500 feet, and shall be provided at the closed end with a turn-around having an outside roadway diameter of at least 80 feet, and a street property line diameter of at least 100 feet.
(15) No street names shall be used which will duplicate or be confused with the names of existing streets. Street names shall be subject to the approval of the Plat Officer.
(16) No street grade shall be less than 0.25%.
(17) All new subdivisions along state and county highways shall be arranged to provide access to such highways at intervals not less than 1,320 feet, except where impractical or impossible due to existing property divisions or topography. Also, roads and streets within such subdivisions shall be arranged to permit access to adjacent future subdivisions without encroachment upon this regulation.
(B) Alleys.
(1) The minimum width of an alley, if provided, shall be 16 feet.
(2) Alley intersections and sharp changes in alignment shall be avoided, but where necessary, corners shall be cut off sufficiently to permit safe vehicular movement.
(3) Dead-end alleys shall be avoided where possible, but if unavoidable, shall be provided with adequate turn around facilities at the end, as determined by the Plat Officer.
(C) Easements.
(1) Easements across lots or centered on rear or side lot lines shall be provided for utilities where necessary and shall be at least ten feet wide. Easements for street lights shall be located as approved by the City Council.
(2) Where a subdivision is traversed by a watercourse, drainage way, channel or stream, there shall be provided a storm water easement or drainage right-of-way conforming substantially with the lines of such watercourse, and such further width or construction, or both, as will be adequate for the purpose.
(D) Blocks.
(1) The lengths, widths and shapes of blocks shall be determined with due regard to:
(a) Provision of adequate building sites suitable to the special needs of the type of use contemplated;
(b) Zoning requirements as to lot sizes and dimensions;
(c) Needs for convenient access, circulation, control and safety of street traffic; and
(d) Limitations and opportunities of topography.
(2) Pedestrian crosswalks, not less than ten feet wide, shall be required where deemed essential to provide circulations, or access to schools, playgrounds, shopping center, transportation and other community facilities.
(E) Lots.
(1) Building setback lines shall be established on all lots, and the minimum building setback line shall be appropriate for the location of the subdivision and for type of development and use contemplated; provided, however, that they shall not be less than the standards established by the zoning ordinance of the city.
(2) The areas of all lots shall not be less than the standards for corresponding uses established by the zoning ordinance of the city, and:
(a) All lots shall be provided with service to public sanitary sewer or approved sanitary disposal facilities as set forth in § 152.06(B)(2)(b)2.; and
(b) Depth and width of properties reserved or laid out for commercial and industrial purposes shall be adequate to provide for the off-street service and parking facilities required by the type of use and development contemplated, as required by the zoning ordinance.
(3) Corner lots for residential use shall have extra width to permit appropriate building setback from and orientation to both streets.
(4) The subdividing of the land for residential use shall be such as to provide, by means of a public street, each lot with satisfactory access to an existing public street.
(5) Double frontage, and reverse frontage lots, should be avoided except where essential to provide separation of residential development from traffic arteries or to overcome specific disadvantages of topography and orientation. A planting screen easement of at least ten feet, across which there shall be no right-of-access, shall be provided along the line of lots abutting such a traffic artery or other disadvantageous use.
(6) Side lot lines shall be substantially at right, angles or radial to street lines.
(F) Public sites and open spaces.
(1) Where a proposed park, playground, school or other public use desirable for the public interest is located in whole or in part in a subdivision, the City Council may require the dedication of such area within the subdivision in those cases in which it deems such requirements to be reasonable. Fair and just remuneration shall be paid to the subdivider for the land dedicated for this purpose.
(2) Where deemed essential by the City Council, upon consideration of the particular type of development proposed in the subdivision, and especially in large scale neighborhood unit developments, the City Council may require the reservation for the public use of such other areas or sites of a character, extent and location suitable to the needs created by such development for schools, parks and other neighborhood purposes. The subdivider shall be paid fair and just remuneration for the land used for this purpose.
(Ord. passed 4-11-1960)