From the back of his truck, Randy Askea navigates an electric, four-wheeled vehicle with an attached camera through a decades-old pipe running under an earthen dam spanning East Lake Drive in Gainesville. “We’re running a camera up the pipe to check the condition,” he said. Askea, of Continental Pipe Services in Atlanta, expects to find vegetation clogging sections of the pipe, as well as signs of corrosion and leaks.