Civil Engineering is concerned with the improvement and care of the built and natural environments and deals with planning, design, construction, operation, and maintenance of buildings, dams, bridges, harbors, power facilities, pollution control facilities, water supply, and transportation systems. Specialties within the Civil Engineering curriculum include: Structural engineering — Planning, design, and operation of buildings, bridges, and special purpose structures such as towers, cranes, stadiums, industrial plants, and construction materials. Transportation engineering — Planning, design, and operation of highways, airports, seaports, mass transit systems, traffic control systems, and material transport systems. Geotechnical engineering — Design and planning of foundations, dams, tunnels, roadbeds, and other facilities where earth and rock are engineering materials. Water resources & environmental engineering — Planning, design, and management of projects for water supply, wastewater treatment, flood control, urban drainage, pollution control, ground and surface water quality management, and solid and hazardous waste disposal.