A Portland start-up is tapping a new source of renewable power inside the city's water pipes. The new system uses the power of gravity in the city's water pipes.
Lucid Energy has installed four small hydroelectric generators in a pipe that carries drinking water to the city. They will produce enough electricity to power 150 homes.
Company CEO Gregg Semler says this kind of hydropower doesn't disrupt fish or natural stream flows the way dams do. And it supplies a continuous source of renewable energy unlike wind and solar.