(a) 
The arrangement, character, extent, width, grade and location of all streets in a proposed subdivision shall conform to the official city plan and these regulations.
(b) 
All such streets shall be related to existing and proposed streets in the area, topographical conditions, public convenience and safety, and existing and proposed land uses along such streets.
(c) 
All streets shall be platted in such a manner that all resulting lots shall conform to the applicable zoning regulations.
(d) 
Where such streets are not shown in the official city plan, the arrangements of these streets in the subdivision shall either:
(1) 
Provide for the continuation of appropriate projection of existing streets in the surrounding areas; or
(2) 
Conform to a neighborhood plan approved or adopted by the city council.
(e) 
Minor streets shall be laid out so as to discourage through traffic.
(f) 
Where a residential subdivision abuts or contains an existing or proposed major thoroughfare, the city council shall require:
(1) 
Marginal access streets;
(2) 
Reverse frontage with screen planting contained in a non-access reservation along the rear property line;
(3) 
Deep lots with rear service street; or
(4) 
Such other treatment as may be necessary for the adequate protection and stabilization of residential properties and to afford separation of through and local traffic.
(1977 Code, sec. 12-195; 2004 Code, sec. 10.111)
Where a subdivision borders on or contains a railroad right-of-way or limited access highway, the city council may require a street approximately parallel to and on each side of such right-of-way.
(1977 Code, sec. 12-196; 2004 Code, sec. 10.112)
Reserve strips designed and used for the primary purpose of controlling access to minor streets by parties or persons other than a public agency shall be prohibited.
(1977 Code, sec. 12-197; 2004 Code, sec. 10.113)
(a) 
Street jogs with centerline offsets of less than 125 feet shall be avoided.
(b) 
A tangent of not less than one hundred (100) feet in length shall be introduced between reverse curves on arterial and collector streets.
(c) 
Sight distance.
Minimum clear sight distance, measured along the chord of the centerline, shall be provided on all streets as follows:
(1) 
Major streets: 400 feet.
(2) 
Collector streets: 350 feet.
(3) 
Minor streets: 250 feet.
(1977 Code, sec. 12-198; 2004 Code, sec. 10.114)
(a) 
Street rights-of-way and roadway width shall conform to the official city plan.
(b) 
All streets shall be paved in accordance with specifications approved by the city council.
(c) 
The following minimum standards shall apply:
Street Type
Right-of-Way Width
Roadway
Expressway
300-400 feet
Four 24'-36' lanes as determined by the state department of transportation
Urban arterial
100-130 feet
Two 36' lanes
Major thoroughfare
70-100 feet
Two 24'-36' lanes
Major thoroughfare with median
100-150 feet
Two 44'-66' lanes
Commercial street
60 feet
36'
Collector street
60-70 feet
36'-44'
Residential street
50-60 feet
30'-36'
Cul-de-sac
50-60 feet
50' radius
28'-36'; 50' radius
28'-36'; 28-36' radius
(d) 
Half streets shall be prohibited, except where essential to the reasonable development of the subdivision in conformity with the other requirements of these regulations.
(e) 
In no event, however, shall lots facing a one-half minor residential street be permitted.
(f) 
Wherever an existing half street is adjacent to a tract to be subdivided, the other half of the street shall be platted within such tract.
(1977 Code, sec. 12-199; 2004 Code, sec. 10.115)
(a) 
No access on a major street shall occur within minimum intervals of six hundred (600) feet, measured from the nearest intersecting rights-of-way lines (except as modified by subsection (b) below); said distance may be extended or increased if traffic conditions as determined by the city council warrant such extension.
(b) 
In commercial and industrial subdivisions, specifically designated “one-way turn only” access may be provided in the direction of the adjacent traffic and at a minimum distance of three hundred (300) feet between major street intersections or a minimum of three hundred (300) feet between each access point.
(c) 
Commercial or industrial subdivisions should have access to a major or commercial street, and may have access to a collector street, if traffic conditions as determined by the city council warrant such extension, but shall not have access to a residential street.
(d) 
To assure traffic safety, appropriate non-access provisions shall be designated and dimensioned along all abutting streets in commercial and industrial subdivisions. A description of such non-access provisions shall appear upon the plat.
(e) 
Access to property occurring within the minimum distance prescribed for major street access, six hundred (600) feet, shall only be by the closest service or frontage road entrance onto the major street.
(f) 
Individual driveways will be so located on each lot to avoid direct vehicular access to or from any expressway, thoroughfare, or major street. Driveways should be located to enable direct access primarily to or from a minor street or, if necessary, to the collector streets which serve as feeders to or distributors from the major streets.
(1977 Code, sec. 12-200; 2004 Code, sec. 10.116)
(a) 
No street names shall be used which will duplicate or be confused with the names of existing streets.
(b) 
Street names shall be referred to the post office for recommendation and are subject to the approval of the city council.
(c) 
Subdivision names shall not duplicate existing subdivisions of record.
(1977 Code, sec. 12-201; 2004 Code, sec. 10.117)
(a) 
The minimum grade of all streets shall be 0.4% for adequate drainage purposes.
(b) 
Except where unusual topographic conditions justify it, the maximum grade of all streets shall not be greater than the following:
 
Street Type
Grade
(1)
Major
3%
(2)
Collector
5%
(3)
Service streets
7%
(1977 Code, sec. 12-202; 2004 Code, sec. 10.118)
(a) 
Streets shall be laid out to intersect at right angles and may be curved, if necessary, in order to make this possible. In no event shall a street intersect any other street at any angle of less than 75 degrees.
(b) 
Street corners on local residential streets shall have a minimum radius of 20 feet at the curb line or its equivalent.
(c) 
Street corners on commercial and industrial streets shall have a minimum radius of 25 feet at the curb line or its equivalent.
(d) 
Street intersections involving major thoroughfares shall have a minimum street corner radius of 30 feet at the curb line or its equivalent.
(e) 
All street corner radii shall be shown on the preliminary and final plats.
(f) 
A 25-foot area of clear vision at street intersections in subdivisions shall be provided. This area shall be kept clear of all structures and vegetation exceeding a height of two and one-half (2-1/2) feet above the established city street elevation.
(1977 Code, sec. 12-203; 2004 Code, sec. 10.119)
(a) 
The maximum length of a cul-de-sac shall be 500 feet, except where topography would prohibit the use of a standard distance, as set forth in section 10.02.053 of these regulations, between intersecting streets.
(b) 
Each cul-de-sac shall be provided with a turnaround having a minimum right-of-way radius of 50 feet.
(c) 
The road surface within the cul-de-sac right-of-way shall have a minimum width of 28 feet, and a radius of 28 feet.
(d) 
In the case of temporarily dead-ended streets, which are substreets designed to provide future connection with unsubdivided areas adjoining, the city council may require:
(1) 
Temporary easement for a turnaround having a radius of 50 feet; or
(2) 
An appropriate area for a background.
(e) 
In all instances, proper provisions shall be made for adequate storm drainage so that stormwater does not collect at the ends of these streets.
(1977 Code, sec. 12-204; 2004 Code, sec. 10.120)
(a) 
Alleys shall be provided in all commercial districts except where a commercial district will be developed as a self-contained unit; then other provisions shall be made on the site for service drives and service areas.
(b) 
Alleys in residential areas shall not be less than twenty (20) feet in width when provided.
(c) 
Alleys in commercial areas shall not be less than thirty (30) feet in width and shall be paved.
(d) 
Dead-end alleys are prohibited except where natural or other features make it impossible to continue them. Where dead-end alleys are unavoidable they shall be provided with adequate turnaround areas with a minimum radius of forty (40) feet at the dead-end. Background areas may be allowed in residential subdivisions.
(1977 Code, sec. 12-205; 2004 Code, sec. 10.121)
(a) 
Where alleys are not provided or may not be used for utility purposes, easements shall be provided as may be advisable for poles, wires, conduits, storm sewers, sanitary sewers, gas lines, water mains and lines, and other similar purposes.
(b) 
Rear-yard easements shall be at least twenty (20) feet wide. In the event one-half (1/2) of an easement is platted, it shall be not less than ten (10) feet in width.
(c) 
Where a subdivision is transversed by a watercourse, drainageway, channel, or stream, there shall be provided a stormwater easement or drainage right-of-way conforming substantially with the lines of such watercourse and such further width of construction or both as will be adequate for the purpose. Parallel streets or parkways may be required in connection therewith.
(d) 
Twenty (20) foot utility easements shall be provided at the end of cul-de-sacs along major thoroughfares.
(1977 Code, sec. 12-206; 2004 Code, sec. 10.122)
(a) 
In general, blocks should have the following dimensions:
 
Minimum
Maximum
Length
600 feet
1,200 feet
Width
240 feet
400 feet
(b) 
The foregoing dimensions shall be subject to adjustments upon recommendation by the city council where topography, the character of the proposed development, or other similar conditions justify blocks of greater or lesser length and/or width.
(c) 
Block lengths and widths shall be measured from the street right-of-way line.
(d) 
Wherever blocks are longer than 1,000 feet, crosswalks may be required at the approximate center of the block.
(1977 Code, sec. 12-207; 2004 Code, sec. 10.123)
(a) 
The lot size, width, depth, shape, orientation, and minimum building setback lines shall be appropriate for the location of the subdivision and the type of development and use contemplated.
(b) 
Lot dimensions shall conform to the existing zoning regulations, but in no case shall the width of a lot designed for residential use be less than fifty (50) feet.
(c) 
Each lot shall have access and front upon a public street.
(d) 
Double frontage and reverse frontage lots should be avoided except where their use will produce definite advantages in meeting special situations in relation to topography and proper land use.
(e) 
Side lot lines shall be substantially at right angles or radial to street lines.
(1977 Code, sec. 12-208; 2004 Code, sec. 10.124)
When a plat is filed on land that is subject to flooding or has been flooded within the last 20 years and corrective measures have not been taken to prevent re-flooding, or it has soil conditions unsuitable for building purposes, said plat shall not be acceptable except where said property is dedicated to the city or other appropriate municipality subject to its acceptance for a watercourse, water drainage basin, park or a conservancy district or for any other purpose of protecting the health, safety and general welfare of the public.
(1977 Code, sec. 12-209; 2004 Code, sec. 10.125)
In subdivisions designed for more than one dwelling unit per acre of ground within the boundaries of the plat, sidewalks shall be constructed and installed along both sides of all streets (unless exceptional conditions exist which eliminate the necessity for sidewalks) in accordance with the following standards:
(1) 
Sidewalks shall be composed of Portland cement concrete, shall have a minimum width of four (4) feet, a minimum depth of four (4) inches;
(2) 
The outside edge of sidewalks shall normally be placed on the right-of-way line.
(1977 Code, sec. 12-210; 2004 Code, sec. 10.126)
(a) 
At least one street sign shall be installed at each street intersection within or on the perimeter of said proposed plat, to be located preferably on the N.E. corner thereof, between the street and sidewalk at a point approximately six (6) inches from said sidewalk.
(b) 
Street signs shall be of aluminum, six (6) inches by twenty-four (24) inches, shall be double faced with letters of Scotchlite or the equivalent, four (4) inches in height, and shall be mounted upon a galvanized pipe post, ten (10) feet length and two (2) inches inside diameter, set in concrete to a depth of two and one-half (2-1/2) feet.
(1977 Code, sec. 12-211; 2004 Code, sec. 10.127)
The city road construction standards manual is hereby created and adopted. All streets shall be constructed in compliance with the requirements of the manual. A complete copy of the manual shall be maintained by the city secretary and shall be made available to the general public.
(Ordinance 692 adopted 10/16/17)