A department of public works is responsible for maintaining and managing the public infrastructure in a given city, county or state. This department is responsible for maintaining and repairing roads, bridges, tunnels, public beaches and anti-erosion projects along rivers and waterways, public buildings, dams and other essential elements. These departments works are funded by taxpayers at the city, county, state and federal levels since infrastructure projects often cross jurisdictional lines and may be very costly.
Other public works services may include waste management and trash pickup, hazardous waste disposal, and sometimes even the maintenance of public parks and sporting venues. Municipal water and sewer systems are often built, managed and operated by local public works departments.