text:  So have we seen a mountain stream useless in summer dangerous in winter now a torrent now a puddle wasting its unprofitable waters in needless brawling; let a barrier be opposed to its downward course let it be dammed up let a point of resistance be afforded where its waters may be gathered together and regulated you find it turned to valuable account acting with men's hands becoming a productive labourer and contributing its time and its industry to advance the general sum of rational improvement