The Council shall be responsible for the care, protection, preservation, control, improvement, and extension of the utility plants and facilities of the city, and shall adopt such ordinances and resolutions as are required therefor. Such utility plants and facilities shall each be a department of the city, and the management thereof shall be the duty of the City Manager. Such public utility department shall be subject to the provisions of this Charter relating to departments of the city, including such as relate to annual budgets and financial accounting, and to the provisions of this chapter. The City Manager may appoint a Director of the city utilities, with the approval of the Council, and other administrative personnel as shall be required to carry out the operation, maintenance, improvement, and extension of the said city utilities and utility facilities.