(A) Arterial streets shall have a minimum dedicated right-of-way width of 100 feet, with a minimum paving width of 48 feet or two 24- foot pavements separated by a median at least 14 feet in width and shall conform with the adopted major thoroughfare plan.
(B) Major streets shall have a minimum dedicated right-of-way width of 80 feet with a minimum paving width of 48 feet and shall conform with the adopted major thoroughfare plan.
(C) Collector streets shall have a minimum dedicated right-of-way width of 60 feet with a minimum paving width of 40 feet and shall conform with the adopted major thoroughfare plan.
(D) Minor streets shall have a minimum dedicated right-of-way width of 50 feet and a minimum paving width of 30 feet.
(E) Alleys shall be graded for drainage, low spots filled with sandstone and surfaced with crushed rock or gravel. Public utilities or others who make excavations in alleys will replace the subgrade, base, and surface by proper compaction and surface material. Alleys shall have a minimum dedicated right-of-way width of 20 feet in residential areas and 25 feet in commercial, business, and industrial areas, and a paved surface of not less than 25 feet of commercial, business, and industrial areas. Alleys shall be provided in all commercial or industrial areas. Easements of five feet shall be provided on each side of all side lot lines. Dead-end alleys shall not be permitted.
(F) Curbs and gutters shall be required on both sides of all interior streets and on the subdivision side of adjacent streets. Curb and gutter returns shall be required at all alley intersections.
(G) Street signs shall be installed on two diagonally opposite corners of each intersecting street and shall be of a type approved by the City Manager, and installed in accordance with city standards.
(H) Street construction shall be done with respect to base, surface, curbs and gutters, grades, intersection curve radii, and horizontal curves in accordance with the specifications and standards of the city (see Schedule S: street construction, which is attached to Ord. 445 and which is hereby incorporated by reference as if fully set forth herein). All street construction work shall be performed by a bonded contractor who has filed his faithful performance bond with the city, and in addition, said contractor shall file a maintenance bond in favor of the city, guaranteeing the materials and workmanship for a period of one year from the date of acceptance by the city.
(1) Construction requirements shall be as follows:
(a) Streets, including parkways, shall be excavated to the line and grade shown on those construction plans accepted by the city.
(b) Sewer services located in alleys and rights-of-way shall be constructed to the property line, and water services shall be constructed to a point two feet back of the curb, prior to the preparation of the street subgrade. All trenches shall be backfilled in accordance with city standard specifications.
(c) Standard curb and gutter (if used in the subdivision) shall be constructed on both sides of streets and in medians, where applicable, including all curb returns where required, in accordance with the standard specifications and to the line and grade shown on those construction plans accepted by the city.
(d) Standard pavement widths and sections shall be constructed on prepared subgrade in accordance with these standard specifications. Pavement widths shall be measured from back of curb to back of curb. These widths shall be as shown in the thoroughfare plan and, where not shown therein, the widths and thicknesses shall be not less than the following:
TABLE I
Minimum Minimum Minimum
Street Pavement Pavement Wheel
Classification Width Thickness Loadings
Local or Minor 31 feet 6 inches* 5,000 lbs.
5 inches**
Minor Collector 40 feet 7 inches* 9,000 lbs.
6 inches**
Major Collector 48 feet 8 inches* 12,000 lbs.
Arterial or As Indicated in
Thoroughfare Thoroughfare Plan 7 inches** 18,000 lbs.
Alley
(Residential) 20 feet 5 inches**
Alley
(Commercial,
business and
industrial) 25 feet 6 inches**
Walkway 6 feet 4 inches**
*Hot Mix Asphaltic Concrete
**Portland Cement Concrete
The above minimum widths and thicknesses may be upgraded by the city when it is deemed necessary to provide pavement suitable for a collector, arterial, or major thoroughfare.
(e) Where the plasticity index of the natural soil is equal to or exceeds 20, lime stabilization shall be required. A minimum of 6% by weight lime to a depth of 8 inches shall be required. Where the plasticity index of the natural soil is less than 20 but equal to or greater than 15, lime stabilization may be required if, in the opinion of the city, it is necessary in order to achieve a proper subgrade. Soil samples for determining the plasticity index of the natural soils may be required to be taken at locations specified by the city and shall be paid for by the owner. At the owner's option and expense, a lime series test may be made by a qualified testing firm and lime may then be applied at the optimum rate indicated by the test.
1. Asphalt pavement (residential street).
a Subgrade.
i) Subgrade shall be stabilized with hydrated lime or cement, six inches deep and laterally to one foot outside the backs of the curbs. Subgrade shall be stabilized with 5% lime, by weight, if soil plasticity index is equal to or greater than 15, and stabilized with 6% cement, by weight, if soil plasticity index is less than 15. Stabilized subgrade shall be compacted to 95% ASTM D1557.
ii) Subgrade shall be primed with asphaltic oil, MC-30, in accordance with Item 5.3 in Standard Specifications for Public Works Construction prepared by the North Central Texas Council of Governments.
b. Base. Base course shall be four inches of asphaltic stabilized base (Grade 2) (Item 2.4.14 in Standard Specifications for Public Works Construction prepared by the North Central Texas Council of Governments).
c. Wear course. Wear course shall be two inches of hot mixed asphaltic concrete, Type D (Item 2.4.13 in Standard Specifications for Public Works Construction prepared by the North Central Texas Council of Governments).
2. Concrete pavement (residential street).
a. Base. Base shall consist of four inches compacted sand or four inches of natural base stabilized with 6% lime of cement extended 1-0 behind and beyond each side of curbs.
b. Wearing surface. Wearing surface shall be five inches minimum of Class "A" Concrete (SDHPT 1982 Standard Specifications, Item 364) reinforced with No. 3 bars on 24-inch centers each way for curb-to-curb street widths up to 30-0, and six-inch minimum (same specifications) for curb-to-curb street widths exceeding 30-0. The centerline construction joint shall be keyed and tied with No. 3 tie bars 24 inches long on 24-inch centers. Sealed expansion grooves 1-1/4 inches deep shall be provided on the 1/4 points longitudinally and every 15 feet transversely.
(f) When a proper subgrade cannot be constructed in soils having a low plasticity index, cement stabilization may be required when deemed necessary by the city.
(g) All construction shall be in accordance with the revised standard specifications for street construction in the city of Burkburnett.
(2) Private access ways. All private access ways which provide the primary vehicular access to two or more residential lots to be developed as single-family residences, duplexes, townhouses, or any justify combination thereof shall be constructed with a minimum of five inches of reinforced portland cement concrete over a compacted base.
(I) Streets shall be so arranged to provide for the extension of all existing streets and for vehicular circulation throughout the subdivision. Off-center street intersections are not permitted. If they are necessary and essential as approved by the city, then the distance between center lines of offset streets shall be at least 120 feet.
(J) Subdivisions need not follow existing grid street patterns. Courts, cul-de-sacs, loop, or other designs, may be provided if proper access is given to all lots from a dedicated street or court. All dead-end streets shall terminate in a dedicated street space having a minimum radius of 50 feet. Dead-end streets shall not exceed 600 feet in length. Where a street is temporarily dead-ended at a property line and is to be continued when the adjacent property is subdivided a temporary turn-around shall be provided of the aforementioned 50-foot radius.
(K) All adjoining streets and land and any system of streets designed for a subdivision, shall connect with existing or platted streets and alleys in adjacent and contiguous subdivisions. Where no adjacent connections are platted they shall, in general, be arranged in such a manner as to cause no hardship to owners of adjoining property for their future platting and provide access to them which will not be taxable or accessible for special improvements shall not be permitted in any subdivision unless such reserve strips are conveyed to the city in fee simple.
(L) Firelanes shall be provided between any buildings, structures, or accessory buildings where residential entrances do not face a dedicated or designated street. Firelanes shall be directly entered from a street and be sized at a minimum width of 24- 0 with an additional 5 - 0 fire equipment staging area immediately contiguous to the firelane for safety purposes.
(Ord. 445, passed 12-21-87; Am. Ord. 503, passed 5-4-93) Penalty, see § 155.99