Water flowing through the city’s pipes will generate electricity like a dam with none of the environmental consequences.

​You’d be forgiven if the phrase “Portland goes green with innovative water pipes” doesn’t immediately call to mind thoughts of civil engineering and hydro-electric power.

And yet, that’s exactly what Oregon’s largest city has done by partnering with a company called Lucid Energy to generate clean electricity from the water already flowing under its streets and through its pipes. 
Source:  https://www.good.is/money/portland-pipeline-water-turbine-power