(a) The contractor shall begin work within thirty (30) days from the acceptance of his bid and shall use all reasonable and proper diligence in prosecuting the same to completion with an adequate force of men and trucks and the necessary appliances and machinery to carry on the work without interruption, in a manner and with such speed and progress as will be commensurate and in keeping with the character, extent and magnitude of the work to be done.
(b) For any reason satisfactory to him the urban county engineer may postpone the date for the commencement of work upon any street, alley or public way for a reasonable time, and may suspend such work when commenced for a reasonable time; but, in the event of such postponement or suspension, a corresponding period of time of fair working weather shall be added to the time for the completion of the work.
(c) The work shall be done in a proper and first class manner in every respect and shall conform strictly to the prescribed plans and specifications. If any contractor abandons such work for ten (10) days or fails to prosecute the same with the required diligence for such period, except for causes beyond his control, the urban county government may, after ten (10) days written notice, delivered to the contractor or mailed to him at his last-known address, let the work to another contractor, or may have such work done and, in either case, charge the cost of the completion thereof to the original contractor and pay the same out of the contract price; and if such contract price be insufficient, the excess shall be paid by the original contractor, and his bondsmen shall be liable therefor; but nothing herein shall be construed as excluding the urban county government from exercising any other right or remedy at law which it may have against any contractor failing to comply with his contract.