(A) The safety-service director shall manage and supervise all public works and undertakings of the city, except as otherwise provided by law.
(1) The director shall supervise the improvement and repair of streets, avenues, alleys, lands, lanes, squares, wharves, docks, landings, market houses, bridges, viaducts, aqueducts, sidewalks, playgrounds, sewers, drains, ditches, culverts, ship channels, streams, and watercourses, the lighting, sprinkling, and cleaning of public places, and the construction of public improvements and public works, except as otherwise provided in R.C. Title VII.
(2) The director shall manage municipal water, lighting, heating, power, garbage, and other undertakings of the city, and parks, baths, playgrounds, market houses, cemeteries, crematories, sewage disposal plants, and farms, and shall make and preserve surveys, maps, plans, drawings, and estimates. He shall supervise the construction and have charge of the maintenance of public buildings and other property of the city not otherwise provided for in R.C. Title VII. He shall have the management of all other matters provided by the council in connection with the public service thereof.
(3) The director shall keep a record of his proceedings, a copy of which, certified by him, shall be competent evidence in all courts.
(R.C. § 735.02)
(B) Under the direction of the mayor, the director shall be the executive head of the police and fire departments and the chief administrative authority of the charity, correction, and building departments. He shall have all powers and duties connected with and incident to the appointment, regulation, and government of these departments except as otherwise provided by law. He shall keep a record of his proceedings, a copy of which, certified by him, shall be competent evidence in all courts.
(C) The director shall make all contracts in the name of the city with reference to the management of these departments, for the erection or repair of all buildings or improvements in connection therewith, and for the purchase of all supplies necessary for these departments.
(R.C. § 737.02)