Mother's Hydroelectric Plant

It took a little innovation and improvisation, but in 1980 MOTHER EARTH NEWS was able to set up a 110 volt AC hydropower plant on a low-head stream on their property.

066 hydroelectric plant - pouring concrete, variable wideth pulley
TOP: Our construction crew prepares to pour the concrete for the civil works. BOTTOM: A system of variable pulleys automatically controls the alternator RPM. 
PHOTO: MOTHER EARTH NEWS STAFF