[1969 Code; 5-15-1990; 11-6-1991; 2016 Code]
All streets and alleys shall be opened, graded, changed, graveled, macadamized, paved, worked or improved, and all sidewalks shall be built and constructed, or rebuilt and all sewers and drains in public streets, alleys and public grounds, all bridges and all other public works, in any streets, sidewalks or other public grounds, shall be built, constructed, erected, or completed according to the plans and specifications therefor adopted, which plans and specifications shall be kept on file in the office of the city clerk or city engineer. Such work shall be done in the manner and of the materials in such specifications prescribed and not otherwise. No bids or proposals for the doing or performing of any of the work mentioned shall be called for, nor any contract therefor let or awarded, nor work thereon commenced until such plans and specifications have been adopted by the council and filed in the office of the city clerk, for inspection by any person concerned.