It shall be the duty of the Engineer of the Municipality or the Director of Public Works to supervise construction or repair of sidewalks within the Municipality. He shall cause specifications to be prepared for the construction of the various kinds of pavements and transmit the same to Council for approval. When the specifications are approved, Council shall advertise for proposals to do all the work which may be ordered by the Municipality in construction and repair of sidewalks, and shall contract therefor, for a period not exceeding one year, with the lowest responsible bidder, who shall furnish good and sufficient sureties for the faithful performance of the work. Council, if it deems advisable, may make separate contracts for the different kinds of work with different parties. (1993 Code 97.08)