(A) Curbs, gutters and driveway entrances may be constructed along county roads and streets; provided, that the construction is done to lines and grades approved by the county Road Commissioner. Construction shall be done to the following standards, and the Road Commissioner shall have the right to allow for minor deviations in order to fit conditions which may exist upon the ground and to expedite drainage:
(1) All concrete used for construction under this section shall contain not less than 470 pounds of cement per cubic yard of concrete. Aggregate used in concrete shall be reasonably clean and free from dirt, vegetable and other deleterious matter. Finished concrete shall have a compressive strength of not less than 2,000 pounds per square inch when tested, in accordance with the standard testing procedures for concrete, 28 days after mixing.
(2) Curbs and gutters shall be integral, with the curb surface not less than six inches in width and projecting five and five-eighths inches above the gutter invert. Gutters shall be not less than five and five-eighths inches thick and not less than 16 inches in width. Gutters shall be pitched toward the curb at the rate of one-half inch per foot.
(3) Sidewalks shall be not less than three and five-eighths inches thick and not less than five feet wide, and shall be pitched toward the street at the rate of one-quarter inch per foot.
(4) Concrete surfaces exposed to pedestrian or vehicular traffic shall be brush finished in order to present a reasonably non-skid surface. Curb faces shall be troweled smooth. All exposed edges shall be edged with a proper tool having a one-half inch radius.
(5) Concrete forms shall not be removed for at least four hours after pouring, and all exposed surfaces shall be cured as directed by the Road Commissioner. Expansion joints shall be installed at locations and in a manner to be determined by the Road Commissioner.
(6) Any concrete placed that is not in conformance with the requirements of this section shall be in violation of this chapter and shall be removed within five days after receipt of notice in writing from the Road Commissioner.
(B) The Board of Supervisors reserve the right to permit major deviations in curb and gutter design for special conditions where conformance with these standards is not practical.
(1966 Code, § 14-4) (Ord. 184, § 6)