The Commissioner of Public Works shall be the Superintendent of Streets, Superintendent of Sewage and Disposal, Superintendent of Water Works and City Tree Warden. Together with the City Engineer, the Commissioner shall be responsible for making all public surveys of public streets, water courses, bridges and culverts, sewers, and ground of said City and all plans and specifications for the construction, improvement, and repair thereof. In carrying out these duties the Commissioner shall consider long range planning for the development of the City and keep proper records of all matters relative to the office. It shall be the duty of the Commissioner to perform such additional duties as may be required by the Board of Aldermen.