Section 98-92. Streets.
(a) Arterial streets cross sections of a subdivision shall be in accordance with the city comprehensive plan and as determined by the city engineer and approved by the planning and zoning board.
(b) collector streets shall have either:
(1) A 60-foot-wide right-of-way, two 20-foot-wide pavements, four-foot-wide separation strips, five-foot-wide sidewalk on each side; or
(2) A 60-foot-wide right-of-way, 40-foot-wide pavement and four-foot-wide sidewalk on each side.
(c) Minor streets for row houses and apartments shall have a 60-foot-wide right-of-way, 36-foot-wide pavement, and five-foot-wide sidewalks on each side. For residences, minor streets shall have a 50-foot-wide right-of-way, 24-foot-wide pavement, and five-foot-wide sidewalks on each side.
(d) Marginal access streets shall have a 50-foot-wide right-of-way, 24-foot-wide pavement, and five-foot-wide sidewalks on each side.
(e) Streets along development boundaries and streets connecting a development with existing improved street systems require cross sections as determined by the city engineer and approved by the planning and zoning board.
(f) alleys must be paved full width, 20 feet minimum, as per approval of the city engineer.
(g) grades on streets require plans and profiles to be approved by the city engineer.
(h) Radii of pavements at street intersections shall not be less than 30 feet at the edge of the pavement or face of the curbline.
(i) All rights-of-way for streets, roads and drainage easements are to be cleared for their full width and, upon completion, left in a clean and neat condition. If required to prevent erosion or excessive washing, such areas abutting the street and ditches shall be sprigged with grass or other protective measures shall be taken as required by the city engineer.
(j) All necessary drainage easements shall be furnished at no expense to the city.
(k) The developer shall give the city engineer at least two weeks' notice in writing by registered letter before the commencement of any construction.
(l) The developer shall have available a qualified engineer or assistant for the purpose of setting all line and grade stakes when required by the contractor or inspector.
(m) The city may have an inspector on the project when deemed necessary during the construction period. The inspector shall be authorized to enforce the construction of the work in accordance with the plans and specifications covering the work. The inspector shall be furnished with a complete set of plans and specifications for this purpose. If any change is required in the plans during the period of construction, such changes must first be approved by the city engineer.
(n) All paved roads shall provide a minimum of two 12-foot-wide lanes (24 feet width total) exclusive of curbs.
(o) All roadways shall be underlain by a base course of one of the following types, having a minimum thickness of six inches, with design as prescribed by the "Manual of Uniform Minimum Standards for Design, Construction and Maintenance of Streets and highways," as published by the state department of transportation, and no other:
(1) Limerock stabilized base. Limerock base will only be used in well-drained areas not having a high or fluctuating water table. The area must be approved by the city engineer.
(2) Soil-cement base. Design of the mixture shall be submitted to the city engineer for approval before processing begins. Wet-dry test cylinders shall have a psi compression value of 300 pounds or greater at seven days.
(3) Sand bituminous road mix. Design of the mixture shall be submitted to the city engineer for approval before processing starts. The design will include the amount of bitumen by volume to be supplied per inch of depth per square yard of surface and the maximum obtainable density per cubic foot with optimum bitumen content.
(p) The pavement surface of streets shall have single, double or triple surface treatment, and a minimum of a one-inch-thick asphaltic concrete surface course, as specified by the state department of transportation "Standard Specifications for Road and bridge Construction," latest edition.
(q) Subgrade stabilization of streets shall have a limerock bearing ratio (LBR) equal to LBR 40 to depth of 12 inches. The subgrade shall be that portion of the road directly and through 12 inches below the base course, and the entire width of the road and extending six inches back of the curbs. If curbs are not used, the subgrade will be stabilized one foot wider than the pavement on both sides.
(r) Stabilized subgrade requires one LBR for every 600 square yards. Base course design for soil cement and sand bituminous road mix requires a test for every material change. Limerock base course requires a Proctor test for every type of limerock. Asphaltic concrete surface course requires a design to be submitted for approval. A 2300 Hubbard-Field stability is required, as well as type 2, as prescribed by the state department of transportation standard specifications.
(s) curbs and gutters shall have a raised curb of one of the following types and shall be constructed of class A concrete:
(1) Six-inch by 16-inch straight curb.
(2) Combination curb and gutter.
(3) Combination sloped curb and gutter sloped curb.
(t) sidewalks shall be constructed as follows:
(1) residential areas shall have a sidewalk no less than four feet wide.
(2) Arterial and collector streets shall have a sidewalk five feet wide.
(3) All sidewalks shall be a minimum of three and one-half inches thick, 2500 psi concrete, reinforced with six by six # ten welded wire mesh or with polypropylene fibers ("Fibermesh"), with expansion joints at 30-foot intervals and construction joints at five foot intervals.
(4) All sidewalks must be approved by the city engineer.
(u) Driveway apron shall be a minimum of six inches thick, 2500 psi concrete, with six by six # ten, welded wire mesh. driveways shall be a minimum of three and one-half inches thick, 2500 psi concrete, with a six by six # ten welded wire mesh or with polypropylene fibers ("Fibermesh").
(v) Catch basins and drop inlets shall be constructed of either masonry or reinforced class B concrete.
(w) drainage pipe shall be of a material as approved in the "Roadway and traffic Design Standards," latest edition, as prepared by the state department of transportation.
(x) The developer will furnish and install street markers at all intersections. Such street markers will be of the quality and design as approved by the city engineer.
(y) Seeding and planting of median strips shall be per city specifications.