(a) The county engineer is designated as the individual authorized to make written requisitions upon the county purchasing agent for all articles, materials, supplies, and equipment necessary for the construction, repair, and maintenance of roads and bridges.
(b) The county engineer shall be the custodian of, and shall be accountable for, all road tools, machinery, supplies, and equipment of Escambia County. The county commission shall furnish the necessary storage facilities for the tools, machinery, supplies, and equipment; and the county engineer shall keep on file in his office, at all times, a current inventory of all tools, machinery, supplies, and equipment belonging to the county.
(c) Subject to the approval of the county commission, the county engineer shall fix, from time to time, in accordance with prevailing economic conditions, the scales of salaries or wages to be paid for labor necessary to the construction, repair, and maintenance of the county roads and bridges.