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Individuals whose contracts include construction, repair, improvement, or demolition of the following: bridges; dams; drainage systems; foundations, parking lots; public transit systems; railroads; roads; runways; streets; structural signs & lights; and tanks. The functions carried out by these contractors include but are not limited to the following: building demolition, clearing; concrete work; excavating; grading; non-water well drilling; paving; pile driving; road marking; and steel erection. These contractors also install, maintain, or dismantle the following: (1) power systems for the generation and primary and secondary distribution of electric current ahead of the customer's meter; (2) pumping stations and treatment plants; (3) telephone, telegraph, or signal systems for public utilities; and (4) water, gas, and sewer connections to residential, commercial, and industrial sites, subject to local ordinances. This classification may also install backflow prevention devices incidental to work in this classification when the installer has received formal vocational training approved by the board that included instruction in the installation of backflow prevention devices.
