Section 105-247; Ord. 18097; Amending Chapter 25 of the City Code relating to subdivisions; adopting design standards for streets, sidewalks and bikeways


Ordinance No.            018097                          Council Bill No. B 92-04 (A)     


AN ORDINANCE

amending Chapter 25 of the City Code relating to subdivisions; adopting design standards for streets, sidewalks and bikeways; and fixing the time when this ordinance shall become effective.

BE IT ORDAINED BY THE COUNCIL OF THE CITY OF COLUMBIA, MISSOURI, AS FOLLOWS:

    SECTION 1.  Chapter 25 of the Code of Ordinances of the City of Columbia, Missouri, is hereby amended as follows:

    Material to be deleted in strikeout; material to be added underlined.

Sec. 25-3. Definitions; rules of construction.

    For the purposes of this chapter, the following words, phrases, terms and their derivations shall have the meaning given herein and if not defined herein, shall have the definition as set forth in the zoning ordinance of the city.

. . .

     Owner. Any person or other entity having legal title to or a sufficient proprietary interest to legally effectuate transfer of the property sought to be subdivided. Proprietary interest shall include but not be limited to estate administration, trusteeship, guardianship, and actions under a valid power of attorney. Proprietary interest shall not include an agency or a bare employment relation.

     Pedway. A path that is physically separated from the roadway and intended for shared  use by pedestrians, joggers, skaters and bicyclists.

. . .

     Private drive. A nondedicated entrance to a lot, or an interior circulation driveway within a lot, not itself a public right-of-way.

     Private Street. A thoroughfare designed to provide vehicular access to two or more lots or parcels which is not dedicated for public use.
. . .

Sec. 25-35. Conformance with applicable laws, rules and regulations.

    The subdivider shall adhere to design standards as established in these regulations. In addition, all subdivisions shall comply with the following laws, rules and regulations:

. . .

    (4)     City of Columbia regulations. The standards and regulations promulgated by the city including street and storm sewer specifications and design standards; the sanitary sewer specifications, the specification for water main construction, extensions and alterations; design standards for streets, sidewalks and bikeways; and specifications for all other public improvements and utilities which are hereafter promulgated by the city. The director of public works and the director of the water and light department are hereby authorized to promulgate and establish design standards and specifications for the construction of public improvements and utilities in subdivisions in the city, which shall ensure a high quality construction of such public improvements and utilities such that these public improvements and utilities will serve the public need and be suitable for acceptance and maintenance by the city. The design standards and specifications shall be in substantial conformance with design standards and specifications for construction of similar public improvements and utilities by the city. All promulgated design standards and specifications shall be on file in the office of the city clerk.

. . .

Sec. 25-42. Street improvements generally.

    Streets and curbs and gutters shall be improved to comply with the standards contained herein, and in the city street and storm sewer specifications and design standards, and all design standards and specifications now or hereafter promulgated by the director of public works or adopted by the council, in accordance with the final construction plans required to be approved prior to final plat approval.

. . .

    (2)     Arrangement. All streets shall be located properly with respect to extending existing and platted streets, to traffic generators, to population densities, and to the pattern of existing and proposed land uses.

    a.    Local streets shall be designed to provide convenient and safe access to all properties and to permit efficient drainage and utility systems. The use of through streets shall be encouraged to connect adjoining areas and to facilitate the delivery of public and emergency services; however, straight streets more than eight hundred (800) feet long shall be avoided to discourage speeding. Individual local residential street segments should serve no more than fifty (50) dwelling units without additional street connections. Local streets with connections to arterial and collector streets shall be designed to avoid cut-through traffic. Curvilinear streets are encouraged to minimize speeding and the amount of grading. Cul-de-sacs and loop (U-shaped) streets should be short in length, less prevalent than through streets, and may be especially appropriate to avoid steep slopes, major creeks, floodplains, wetlands and other sensitive environmental areas.   A street connectivity index (consisting of the number of intersections divided by the combined number of intersections and cul-de-sacs) shall be calculated for proposed new subdivisions.

. . .

Sec. 25-43. Street widths.

The right-of-way width required to be dedicated and the pavement width required to be constructed for streets, according to street classification, shall be:



Pavement Width
(back to back of curb)

Type of Street
Minimum Feet
Right-of-Way
Maximum
(Feet)
Minimum
(Feet)
Freeway
Variable
96*
48*
Expressway
Variable
72*
48*
Arterial, urban major**
80-106-110
68
49 60
Arterial, rural minor**
80--106 84-100
68 52
24* 40
Collectors , major**
66 -76
44
38 32
Collectors, neighborhood**
60
34
30
Local, nonresidential, central traffic zone
70 66
44
Local, nonresidential, all other **
60-66
38
38 30
Local, residential **
40-50
32
20-32
Cul-de-sacs, residential (stem portion) **
44-50
32
24-28
Alleys
18
16
Estate lanes
50
28
Frontage roads
30
20
 

*In addition to road pavement, two (2) paved, ten-foot shoulders are required.

**See Appendix A - “Design Standards for Streets, Sidewalks and Bikeways,” which is filed in the office of planning and development and in the office of the city clerk, for additional standards and criteria for the application of these requirements.

    (1)    Proposed subdivisions that include existing street rights-of-way narrower than required herein shall provide for dedication of appropriate additional width along one (1) or both sides of the street. Proposed subdivisions abutting only one (1) side of such streets shall provide for dedication of additional width to constitute one-half of the right-of-way required.

     (2)    In commercial areas where heavy vehicular traffic will be produced, the commission may require dedication of additional street right-of-way width and construction of additional pavement to serve as access to the intended commercial area and to ensure the free flow of through traffic on the street involved. This requirement shall be at the expense of the subdivider and shall be so indicated on the preliminary plat prior to its endorsement by the commission.

    ( 32)    In low density, single-family residential subdivisions, the width of local residential streets may be reduced from thirty-two (32) feet to twenty-eight (28) feet (estate lanes) if the subdivision complies with all of the following criteria:

. . .

Sec. 25-47. Terminal streets.

    (a)     Permanent terminal streets shall not be longer than seven hundred fifty (750) feet, measured from the center of any cul-de-sac to the right-of-way line of the nearest through street from which it derives.

    (b)     Terminal streets shall also have a turnaround at the closed end with an outside roadway diameter of at least seventy-six (76) feet and right-of-way diameter of at least ninety-four (94) feet.

    (c)     Residential alleys shall not be permitted in single-family all residential areas.

    (d)     Nonresidential alleys shall be provided in commercial and industrial districts when off-street loading and parking are not otherwise provided.

    (1)    The right-of-way width of an alley shall be twenty (20) feet and the pavement width shall be sixteen (16) feet.

    (2)    When alleys intersect, the intersection right-of-way lines shall be rounded by a curve with a radius of five (5) feet in length.

. . .

Sec. 25-48.1. Sidewalks generally (plats approved after January 1, 2001).

    (a)    Sidewalks shall be constructed within all pedestrian easements and on both sides of all internal streets and on the abutting side of any adjacent street unless otherwise specified in this chapter. Sidewalks shall be a minimum of five (5) feet in width or they may be four (4) feet in width when located along a local residential street that does not adjoin an existing or proposed park, school, church or other high pedestrian traffic generating use.  A sidewalk shall not be required along a residential access street which is less than two hundred-fifty (250) feet in length and terminates in a cul-de-sac. Sidewalks shall be a minimum of five (5) feet in width along all other streets.

. . .

Sec. 25-52. Reserved Bike lanes and pedways.

     Bicycle lanes and pedways shall be designed and constructed in accordance with Appendix A - “Design Standards for Streets, Sidewalks and Bikeways” and all applicable design standards and specifications now or hereafter promulgated by the director of public works or adopted by the council.
. . .

Sec. 25-55. Drainage and storm sewers.

    (a)      Flood-prone areas. Any portion of land being subdivided which is located within the limits of maximum flooding of the 100-year flood, as determined by December 1, 1981, flood insurance rate maps and amendments thereto on file with the director of public works, shall be developed so as not to endanger the health, safety and general welfare of the inhabitants thereof, and in compliance with the provisions of the zoning ordinance related thereto.

    (b)      Storm sewers. Storm sewers with curbs and gutters shall be provided for lots; however, open channels may be allowed where deemed appropriate and when design features, such as vegetated swales and check dams, are used to reduce runoff velocity and allow infiltration.  Sidewalks and pedways shall not be located between the street and open channel.  Improvements and shall conform to standards contained in the city street and storm sewer specifications and design standards, and the city storm drainage standards, and all applicable design standards and specifications now or hereafter promulgated by the director of public works or adopted by the council.

    (c)      Driveways across drainage features. Driveways that cross drainageways or ditches to connect to public streets shall be constructed in a manner and method approved by the director of public works consistent with the public health, safety and welfare.

     (d)    Streets crossing streams. Streets that cross streams shall be designed and constructed in a manner that minimizes the disruption to the stream channel and buffer zone.  Streams should be crossed only when necessary to connect the street network.

Sec. 25-56. Utilities.

    Utilities, including but not limited to water, sewer, natural gas, electric and telephone lines, and fire hydrants, shall be provided to lots in accordance with standards and specifications governing the construction and installation of such utilities which have been or are hereafter adopted by the council or promulgated by the city departments or utility companies responsible therefor.   Easements for public and private utilities shall be provided  adjacent to all street right-of-way and in other locations in accordance with facility requirements and design standards. To the maximum extent feasible, utilities shall be located in designated easements and not in street right-of-way.

. . .

    SECTION 2.  The City Council hereby adopts “Appendix A, Design Standards for Streets, Sidewalks and Bikeways” a copy of which is attached to and made a part of this ordinance.  A copy of Appendix A shall be on file in the office of planning and development and in the office of the city clerk.

    SECTION 3.  Preliminary plats filed with the department of planning and development within two months following passage of this ordinance may follow either the street standards adopted by this ordinance or the street standards in effect immediately before passage of this ordinance.

    SECTION 4.  This ordinance shall be in full force and effect from and after its passage.

    PASSED this 7th day of June, 2004.