There shall be a Public Works Department, the head of which shall be the Director of Public Works.
Within the Public Works Department, there shall be a professional engineer, or an engineering firm, licensed by the State of New York on staff or under contract, who shall assist and advise the Director of Public Works in the performance of his duties.
The Director of Public Works shall, except as otherwise provided by this Charter or by law:
A. 
Design or cause to be designed, construct or cause to be constructed, manage, maintain, operate and be responsible for all of the public works and physical properties of the city.
B. 
Supervise and administer all contracts with the city for public construction or public service.
The Director of Public Works shall be the custodian of the Official Map of the city, as established, changed or amended from time to time, pursuant to law. The Director of Public Works shall cause any change, amendment, addition thereto or deletion therefrom authorized pursuant to law to be recorded on the map by appropriate revision and notation.