(1) The board of supervisors shall never make a payment to any contractor for building or repairing a bridge, or for doing any work on a public road, public building or other public work, where the contract price exceeds Two Hundred Dollars ($200.00) but is less than One Thousand Dollars ($1,000.00), without first having the same inspected and accepted by a committee, and having the certificate of the committee, under oath filed and entered on the minutes of the board. Such committee shall be appointed by the board of supervisors for that purpose and shall consist of at least two (2) members of the board of other districts than the one in which the work is done. The board shall not be bound by the acceptance of the committee, and shall never pay for the work in such cases until the specifications therefor are complied with and the work completed. In all cases of public work let by the board of supervisors where the contract price exceeds One Thousand Dollars ($1,000.00), the board may contract so as to provide for making partial payments to the contractor therefor as the work progresses. In no case shall the retained amount of such partial payments be less than two and one-half percent (2 ½%) nor more than ten percent (10%) of the value of the work done and material used in the performance of the contracts, such value to be estimated by some competent person employed by the board to superintend such work, and not until the superintendent shall furnish to the board such estimate, in writing, on his oath as to the correctness of such estimate, which estimate, with the oath annexed thereto, shall be filed with and recorded in the minutes of the board; provided, however, the amount retained by the prime contractor from each payment due the subcontractor shall not exceed the percentage withheld by the board of supervisors from the prime contractors. Before such person employed by the board shall enter upon the discharge of the duty of supervising such work, and before he shall furnish any estimate as to the value of the work done, he shall enter into bond in such penalty as may be fixed by the board, with sufficient sureties, to be approved by the board, and conditioned for the faithful performance of his duties as superintendent of such work, which bond shall be filed and preserved by the board, and shall be liable to suit thereon in the name of the county, for any misfeasance or malfeasance on the part of such superintendent touching the performance of his duties. The board shall not be bound by the estimate of such superintendent, nor shall the making of any partial payments on any public work, as above provided, be construed as an acceptance of the work and materials so inspected by such superintendent. The board shall not make the final payment on any such works or building without first having the same inspected as a whole and accepted by a committee of the board, as hereinbefore provided, and until the specifications are complied with and the work completed.

(2) The board of supervisors may make partial payments for the work done and materials used in performance of all contracts for public buildings and public works upon certification in writing to the board by the architect or engineer on the project; and on all such contracts for work done and materials used in performance of said contracts a percentage of not less than two and one-half percent (2 ½%) of each estimate thereon paid shall be retained until final acceptance of such project.

(3) On any contract as described in this section, except for a contract for building or repairing a bridge or doing any work on a public road, of which the total amount is Seven Hundred Fifty Thousand Dollars ($750,000.00) or greater, ten percent (10%) shall be retained until the work is at least fifty percent (50%) complete, on schedule and satisfactory in the architect’s and/or engineer’s opinion. At such time fifty percent (50%) of that retainage shall be returned to the prime contractor for distribution to the appropriate subcontractors and suppliers who are on schedule and performing satisfactorily, in the opinion of the prime contractor. Thereafter, a five percent (5%) retainage shall be withheld.