(A) Installation required. The subdivider shall be responsible for the adequate installation of all the physical improvements as required by these regulations. Public improvements to be installed by the county or any corporate municipality or governmental body shall be withheld until the final plat has been approved and recorded, as required by these regulations.
(B) Monuments. All lot corners shall be monumented by at least a one-half inch diameter round or one-half inch iron pipe at least 30 inches long set on the corner. All lot corners that may have been disturbed or lost during construction of streets and sewers shall be replaced at the expense of the subdivider. The beginning and ending of all curves and a minimum of two corners of each block and a minimum of two corners at each street intersection shall be monumented with a permanent monument set in a concrete pose, the concrete having a minimum length of 36 inches and a minimum cross-section of a four-inch diameter circle. This monument shall be set sufficiently below the surface of the ground to make its disturbance unlikely.
(C) Streets.
(1) Grades. Streets (and alleys where provided) shall be completed to the grades shown on plans, profiles and cross-sections, provided by the subdivider and prepared by a registered professional engineer and approved by the City Council.
(2) Grades, surfaces and improvements. The streets shall be graded, surfaced and improved to the dimensions required by such plans, profiles and cross-sections and the work shall be performed in the manner prescribed in Standard Specifications for Road and Bridge Construction adopted by the Department of Transportation of the state.
(3) Large lot subdivisions. In subdivisions having an average lot area of 15,000 square feet or more, the road surface shall be a minimum width of 20 feet edge to edge on a 22-foot base with a shoulder width of at least five on each side of the road surface.
(4) Small lot subdivisions. In subdivisions having a lot area of less than 15,000 square feet, the road travel surface shall be a minimum width of 26 feet, edge to edge with additional two-foot portland cement concrete gutter, or P.C.C. curb and gutter, on each side of the road surface. See Plate 1 for standard design.
(5) Permanent turnarounds. The outside diameter of the surfaced area of permanent turnarounds shall not be less than 80 feet.
(6) Construction. Pavement construction for streets, highways and alleys shall conform to the following:
Design Characteristics for Street and Alley Pavements | ||||
Minimum Thickness - by Street Classification | ||||
Pavement Type and Materials Used* | Feeder | Local** | Alley | Arterial |
Design Characteristics for Street and Alley Pavements | ||||
Minimum Thickness - by Street Classification | ||||
Pavement Type and Materials Used* | Feeder | Local** | Alley | Arterial |
Bituminous material surface | 2" | 2" | 2" | To conform to State Department of Transportation Standards |
Bituminous surface treatment | Subclass A3 or equivalent | |||
Flexible base (gravel of crushed stone) | 7" | 7" | 7" | |
Portland cement concrete (uniform thickness) | 7" | 6" | 6" | |
Soil-cement base | 7" | 6" | 6" | |
NOTES TO TABLE: * All paving materials shall conform to the State Department of Transportation Specifications. ** When a local street serves industrial or commercial development use feeder street design characteristics. | ||||
(D) Curbs and gutters. Gutters and combination curbs and gutters, shall be Portland cement concrete, not less than 24 inches in overall width and not less than six inches thick, as shown on Plate 1.
(1) Wherever a proposed subdivision lies adjacent to or between other subdivisions which have been provided with curb and gutter, the subdivider shall install curb and gutter on each side of the street surface.
(2) The curb and gutter shall be one of the construction types shown in the current applicable standard specifications of the State Department of Transportation or as shown on Plate 1 and shall be constructed according to the following specifications.
(a) The base for the curb and gutter shall be well-compacted on the existing base or grade.
(b) The minimum specifications shall be as shown for the types of cross-sections in the standard specifications.
(c) All concrete used in the curb and gutter shall meet the specifications of the State Department of Transportation.
(3) Integral or monolithic curb of the same dimensions as shown in the standard specifications or on Plate 1 may be built on concrete pavement, provided the pavement widths as set out elsewhere in these regulations are maintained.
(E) Sidewalks.
(1) Wherever a proposed subdivision lies adjacent to or between other subdivisions which have been provided with sidewalks, or whenever the proposed subdivision will average more than three and one-half lots per gross acre included in the subdivision, the subdivider shall install sidewalks on each side of the street.
(2) When sidewalks are required, they shall be constructed of portland cement concrete, at least four inches thick, and four feet wide and placed immediately inside the street property line. (See Plate 2.)
(3) All concrete used in the sidewalks shall meet the specifications of the State Department of Transportation.
(F) Drainage facilities. Surface and/or subsurface drainage shall be designed so as to adequately drain all portions of the subdivision including streets. When a drainage system is installed, the agency that will have maintenance responsibility of the street system must be consulted as to acceptance of the drainage system.
(G) Culverts, bridges, intersections and private entrances.
(1) Entrance culverts where required shall be constructed of the type and size specified by the agency having maintenance jurisdiction, and laid to the flow line grade of the existing ditch and at no time shall such culvert pipe be less than 12 inches in diameter or less than 24 in length.
(2) Entrance driveways shall be constructed of the same surfacing material as the street back to the property line, not less than an equivalent of CA-6 or CA-10, six inches in depth, and shall be laid so that the finished surface of the driveway shall slope away from the traveled surface of the road at a slope equal to the existing shoulder lines at the location of the driveway.
(H) Water.
(1) The subdivider shall make available to the subdivision a complete approved water main supply system, which shall be connected to an existing approved municipal or community water supply; except that, when such municipal or community water supply is not available, the subdivider shall make available one of the following:
(a) A complete community water supply system in accordance with the minimum requirements and recommendations of the appropriate state agency; or
(b) An individual water supply on each lot in the subdivision in accordance with the minimum requirements and recommendations of the appropriate state agency.
(2) The plans for the installation of the water main supply system shall be provided by the subdivider and approved by the appropriate state agency. Upon completion of the water supply installation, the plans for such system as built shall be filed with the City Road Commissioner accompanied by a registered professional engineer’s certificate which states that the system has been constructed in accordance with the plans and specifications as set forth herein.
(I) Sanitary sewers.
(1) No plats of any new subdivision shall be approved by the Plat Committee unless the same provides for and assures the construction by the subdivider of a sanitary sewer system adequate to serve the needs of the entire subdivision when the same is fully developed. The location and design of the system shall be approved by the Plat Committee, the appropriate state agency and the corporate authorities of any sanitary district of community in which such subdivision or any part thereof may be located. Such approval will also be required when the sewer system connects directly to an interceptor constructed and maintained by such sanitary district or community. Upon completion of the sanitary sewer installation, the plans for such system as built shall be filed with the City Road Commissioner, accompanied by a registered professional engineer’s certificate which states that the system has been constructed in accordance with the plans and specifications as set forth herein.
(2) These requirements shall not be applicable to any new subdivision which is not within the boundaries of a sanitary district or cannot be provided with sanitary sewer service by a sanitary district, public utility or the city. If the subdivision cannot be served by sanitary sewers and treatment, then each developed lot shall be of adequate size to accommodate individual sanitary sewage disposal. Such disposal shall be in accordance with the State Department of Public Health Circular No. 4.002 and all revisions and amendments thereto. Under no circumstances shall the effluent from any septic system be discharged into a tile or open ditch. Results of an location of percolation test shall be shown on the preliminary plat or plans. The covenant for the subdivision shall require the owner to comply with the previously mentioned regulations.
(J) Alleys. The minimum widths of improved paved areas of alleys shall be as follows:
Alleys to serve business, commercial and industrial use areas | 20 feet |
Alleys to serve multiple-family residential use areas | 16 feet |
(Ord. passed - -)