(A) (1) All streets or other right-of-way designated for public vehicular use and county maintenance shall be designed and constructed in accordance with the adopted road standards of the county, including adequate and required street or highway signs, cattle guards and other necessary items, which are incorporated into this chapter as division (B) below. Maps and plats, when properly made, acknowledged, filed and recorded according to the procedures specified, operate as a dedication of all streets and other public places and vest the fee of those parcels of land in the county for the public for the uses named or intended in those maps or plats. However, mere dedication of streets does not trigger the county’s duty to maintain such roads until they have been constructed or improved to the above mentioned county road standards.
(2) If, due to the size of a development, a turn lane is required to access a public street or streets to be used in the development, the county shall require the subdivider to obtain and produce for county review a letter from UDOT stating such.
(B) (1) Street types.
(a) Residential streets. Streets which primary function is to provide access to individual lots within the subdivision. This would include all streets, except the ones designated as collector streets.
(b) Collector streets. The main streets in the subdivision. This would usually be the street that enters or exits the subdivision which serves as a collector of all the residential streets.
(2) Street widths.
(a) Unless deemed otherwise by the county’s Road Department, residential streets shall have a minimum right-of-way of 50 feet. The minimum surface width for gravel shall be 26 feet. The minimum surface width for pavement shall be 24 feet. Gravel streets in Spanish Valley are not permitted and must be paved.
(b) Collector streets shall have a minimum right of way of 60 feet. The minimum width for gravel shall be 32 feet. The minimum surface width for pavement shall be 30 feet.
(3) Street design standards.
(a) Width requirement. Before any street is accepted by the county for maintenance, the street must be constructed to the width requirement. A minimum of nine-inch compacted depth of base material must be placed on the street. Of this base material, the surface must consist of a minimum of three inches of one inch or three-quarter inch crushed gravel. This material must be accepted by the county’s Road Department and, if deemed necessary, testing of the material and compaction may be required by the engineer. If such testing is required, this shall be done at the expense of the subdivider.
(b) Asphalt surfaces. If the street is constructed to an asphalt surface, the surface depth must be a minimum of three inches to be accepted for maintenance by the county. Asphalt and compaction must be accepted by the county’s Road Department and, if deemed necessary, testing of the material and compaction may be required by the engineer. If such testing is required, this shall be done at the expense of the subdivider. All newly constructed subdivision roads in Spanish Valley shall have an asphalt surface.
(c) Minimum grade. Unless deemed otherwise by the county’s Road Department, the minimum grade for all streets shall be 0.5%. The maximum grade allowed for residential streets is 8% and for collector streets is 6%. Where the observance of this requirement is unfeasible, an exception may be granted. Streets should be leveled, when possible, to a grade of less than 4% for a distance of at least 50 feet approaching all intersections.
(d) Intersecting right angles. Whenever possible, streets shall intersect at right angles. When streets meet at acute angles, a reasonable radius will be required.
(e) Dead end streets. Dead end streets will have a turn-around (cul-de-sac) with a minimum radius of 50 feet. Dead end streets should not exceed 500 feet in length if possible.
(f) Intersections. No more than four streets shall enter an intersection.
(g) Vertical curves. Vertical curves shall be used at all changes of grade exceeding 1%. Horizontal curves shall be required if street lines deflect more than five degrees. The minimum centerline radius for residential streets shall be 150 feet. Collector streets shall be 300 feet.
(h) Curb and gutter. The minimum widths of streets which have curb and gutter shall be 40 feet on residential streets and 50 feet for collector streets. All measurements are from the back of the curb to the back of the curb.
(i) Cattle guards. Any cattle guards required or installed shall be in compliance with the county’s Cattle Guard Policy and shall be of a width and construction approved by the county’s Road Department.
(j) Signs. The subdivider shall provide and install any required signs on roads or streets as required by the Manual of Uniform Traffic-Control Devices and by the county’s Road Department.
(k) Gates. No gates, whether locked or unlocked, shall be allowed on any roads or streets accepted by the county.
(l) Public streets. All roads or streets accepted by the county are considered public roads and access by the public cannot be limited by the subdivider or future owners of any of the lots within the subdivision.
(m) Drainage/curb and gutter. In the absence of curb and gutter, the subdivider shall provide a street drainage plan detailing potential impacts to county roads and streets. The subdivider shall be required to provide and install culverts or other drainage structures as required by the county.
(n) New streets. When a subdivision is considered to be high density. The county may require the subdivider to pave the road with a minimum of a two lift armor coat consisting of one lift using a three-quarter inch dirty gravel chip and the second lift using a one-half inch clean gravel chip; or as determined by the county a compacted asphalt mat consisting of a minimum two-inch depth when fully compacted may be required.
(o) Existing streets. The county may consider on a case by case basis the upgrading of officially accepted roads that meet the county standards in high density subdivisions with at least ten or more lots, or when conditions in the subdivision may cause safety or health related issues.
(4) Easements.
(a) Easements for utilities such as poles, wires, conduits, gas lines, water lines and the like shall be located at the rear of all lots, whenever possible. The width shall be a minimum of 15 feet, which can be divided between adjoining lots.
(b) If front line easements are required, a minimum of 15 feet shall be allocated. All easements shall be designed so as to provide efficient installation of utilities.
(c) If front line easements are required and are within the right-of-way of any road or street, sufficient and proper compaction of any underground lines shall be required. Testing of compaction shall be at the expense of the subdivider.
(d) All utilities shall be provided in compliance with all of the required building codes covering such installation.
(Ord. passed 4- -2016)