(A) Conformity to Comprehensive Development Plan. Designs shall conform to the City Comprehensive Development Plan. The following requirements of design and development are to be considered as minimum standards.
(B) Duties of subdivider.
(1) Provide typical sections and profiles of the proposed streets showing widths and grades of roadways, types of surfacing, curb locations and width and location of sidewalks;
(2) Provide preliminary layout plan and profiles of proposed sanitary and storm sewers, with tentative grades, pipe sizes and the location of appurtenances;
(3) Provided preliminary layout plan and profiles of the proposed water distribution system showing tentative pipe sizes and location of appurtenances; and
(4) Provide lighting plan.
(C) Relation to adjoining street system.
(1) A subdivision shall provide for the continuation of the principal streets existing in the adjoining subdivisions or of their proper projection when adjoining property is not subdivided, and such streets shall be of a width not less than the minimum requirements for streets set forth in the regulations of this chapter.
(2) Where the plat submitted covers only a part of the subdivider’s tract, drawing of the prospective future street system of the entire tract shall be furnished and the street system of the part submitted shall be considered in light of conformity to the street system of the entire tract.
(3) Where a tract is subdivided into lots of an acre or more, the Planning Commission may require an arrangement of lots and streets such as to permit a later subdivision in conformity to the street requirements and other requirements contained in this chapter.
(4) No lane, road, avenue, street or platted street or right-of-way shall be accessed through any privately owned property or by any subdivision or development except where that access has been reviewed by the Planning Commission and accepted by the city as a deeded or platted access, and in no case shall any lane, road, avenue or street receive traffic flow greater than its intent and design.
Residential Streets Table | ||||
Lane | Minor Residential | Major Residential* | Low Density Residential | |
Residential Streets Table | ||||
Lane | Minor Residential | Major Residential* | Low Density Residential | |
Volume (ADT) | 100 | Up to 300 | Up to 1,000 | |
Design speed | 15 mph | 20 mph | 25 mph | 30 mph |
ROW width | 30' | 50' | 60' | 60' |
Traveled width | 20' | 29' | 38' | 24', 2-ft. paved shoulders |
Parking | No | One side | Both sides | No |
Curb/gutter (see § 154.05(C)) | No | Yes | Yes | No |
Sidewalk (5') | No | One side | Both sides | No |
*Minimum standard for districts with average density greater than five lots per acre. | ||||
Arterial Streets Table | |||
Residential Collector | Major Arterial | Minor Arterial | |
Arterial Streets Table | |||
Residential Collector | Major Arterial | Minor Arterial | |
Volume (ADT) | Up to 3,000 | Up to 5,000 | Up to 3,000 |
Design speed | 25 mph | 35 mph+ | 35 mph |
ROW width | 60' | 70' | 60' |
Traveled width | 40' | 48'* | 36'* |
Parking | Optional* | No | No |
Curb/gutter (see § 154.05(C)) | Yes | Yes | Yes |
Sidewalk (5') | Both sides | Both sides | Both sides |
*12' moving lanes | *Parking may or may not be allowed, on a case-by-case basis, upon recommendation by the Street Superintendent and Chief of Police. | ||
Industrial Roads Table
| |
Design speed | 30 mph |
ROW width | 60' |
Traveled width | 36', 2-ft. paved shoulders |
Parking | No |
Curb/gutter (see § 154.05(C)) | No |
Sidewalk (5') | No |
(D) Street plan. In order to provide for roads of suitable location, width and improvement to accommodate prospective traffic and afford satisfactory access to emergency services, snow removal, sanitation and road maintenance equipment and to coordinate roads so as to compose a convenient system and avoid undue hardships to adjoining properties, the following minimum design standards for roads are hereby required.
(1) Minimum designs standards.
(2) Additional criteria.
(a) Cul-de-sacs:
1. Minimum property line radius: 50 feet; and
2. Traveled surface radius: 40 feet.
(b) Hammerhead turn-a-round: (allowed only on lanes):
1. Traveled width: 12 feet, 30 feet to centerline;
2. ROW: ten feet all sides; and
3. Radius: 16 feet.
(c) Residential traveled street width is based on moving lanes of ten feet, parking lanes of nine feet.
(d) Traveled width does not include gutter, when required. Gutter width is included in width of parking lanes.
(e) Where required, sidewalk width shall be five feet, setback five feet from curb or edge of pavement. Wheelchair ramps shall be provided at all intersections.
(f) ADT (average daily traffic) is based on four trips per single-family residential dwelling unit, per day.
(g) All streets shall be improved with a wearing surface approved by the city.
(h) Curb/gutter is not required only when a drainage plan for surface water discharge has been approved by the Public Works Administrator.
(E) Street grades and condition.
(1) The grades of streets shall not exceed 10%, except under unavoidable conditions approved by the Planning Commission at the time of preliminary plat approval.
(2) All streets shall have at least a 0.3% grade.
(F) Street curves. Minimum centerlines of curvature, tangents, curb radiuses and sight distances shall be based on design speed as per the Institute of Transportation Engineers, Traffic Engineering Handbook, most current edition.
(G) Alleys.
(1) Alleys may be required in commercial and industrial districts, except that the Planning Commission may waive this requirement where another definite and assured provision is made for service access, such as off-street loading, unloading and parking consistent with zoning ordinance requirements. Such alleys shall have a minimum of 20 feet of right-of-way and shall be dedicated to the public.
(2) Alleys are not permitted in residential districts except when the Planning Commission determines special conditions warrant a secondary means of access.
(H) Sidewalks. As required in the tables in division (C) above, and as required in division (D)(2)(e) above.
(I) Names.
(1) No street names shall be used which will duplicate by spelling or sound, or will otherwise be confused with the names of existing streets. Street names are subject to the approval of the Planning Commission.
(2) Subdivision names and apartment project names shall not duplicate or be confused with existing names. Subdivision and apartment project names are subject to approval by the Planning Commission.
(J) Blocks.
(1) The lengths, widths and shapes of blocks shall be determined with due regard to:
(a) Provisions of adequate building sites suitable to the special needs of the type of use contemplated;
(b) Zoning ordinance 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) Block lengths shall be subject to approval of the Planning Commission but not less than 300 feet, and shall normally be wide enough to allow two tiers of lots of appropriate depth.
(3) Pedestrian crosswalks, not less than ten feet wide, may be required where deemed essential to provide circulation or access to schools, playgrounds, shopping centers, bus stops and other community facilities.
(K) Lots.
(1) The lot size, width, depth, shape and orientation, and the minimum building setback lines shall be appropriate for the location of the subdivision and for the type of development and use contemplated.
(2) Lot dimensions shall conform to the requirements of the zoning ordinance and the requirements of the State Health Department. In such cases where requirements may conflict, the larger requirements shall govern.
(3) Depth and width of properties reserved or laid out for commercial and industrial purposes shall be adequate to provide off-street parking and loading for the use contemplated.
(4) Corner lots for residential use shall have extra width to permit appropriate building setback from both streets.
(5) Each lot shall be provided with deeded access to a street. Double frontage and reverse frontage lots shall be avoided except where essential to provide separation of residential development from traffic arteries or to overcome specific disadvantages of topography and orientation. Along the line of lots abutting such traffic artery or any other such disadvantageous feature, the subdivider shall put in a planting screen easement of not less than ten feet in width, across which no right of access shall be provided.
(6) Side lot lines shall be substantially at right angles to streets except on curves where they shall be radial.
(L) Easements.
(1) Easements across lots or centered on rear or side lot lines shall be provided for utilities and drainage where necessary and shall not be less than 15 feet wide total unless otherwise approved by the City Engineer.
(2) Where a subdivision is traversed by a watercourse, drainageway or stream, there shall be provided a storm water drainage easement or right-of-way conforming substantially with the lines of such existing or planned drainage way. The width of such drainage easement or right-of-way shall conform substantially to the lines of such existing or planned drainage way and shall be sufficient to contain the ultimate channel and maintenance way for the tributary area upstream. Calculations necessary to establishing the magnitude of the drainage way will be paid for by the owner.
(3) Lots and easements shall be arranged in such a manner as to eliminate unnecessary jogs or offsets and to facilitate the use of easements for power distribution, telephone service and drainage, water and sewer services.
(4) All easements shall be designated for public use only.
(M) Drainage and inundation. Drainage and inundation plan shall be pursuant to Chapter 152, Erosion and Sediment Control.
(N) Building restrictions. If the subdivision does not lie within the force and effect of an existing zoning ordinance, the Planning and Zoning Commission may require provisions for minimum front, side and rear yards, based upon the standards of the zoning ordinance.
(O) Non-residential subdivisions. Non-residential subdivisions shall be governed by any and all applicable regulations contained in this chapter.
(P) Private streets and reserve strips. There shall be no private streets platted within a subdivision, and there shall be no reserve strips in a subdivision except where their control is vested in the governing body. Maintenance of such roads shall be the responsibility of the landowners, unless accepted by the governing body.
(Prior Code, § 28.04)