Typically , water is diverted from a river or impoundment or mill pond to a turbine or water wheel , along a channel or pipe ( variously known as a flume , head race , mill race , leat , leet , lade ( ( Scots ) or penstock ) .
Typically , water is diverted from a river or impoundment or mill pond to a turbine or water wheel , along a channel or pipe ( variously known as a flume , head race , mill race , leat , leet , lade ( Scots ) or penstock ) .