Answer: penstocks

AnswerCrossword Clue
PENSTOCKSSluices or floodgates.
PENSTOCKSFloodgates.
penstocksA channel for conveying water to a waterwheel or turbine
penstocksPENSTOCK, a valve-controlled water conduit
penstocksA sluice or floodgate for regulating the flow of a body of water