<P> The peak flow over Horseshoe Falls was recorded at 225,000 cubic feet ( 6,400 m ) per second . The average annual flow rate is 85,000 cubic feet ( 2,400 m ) per second . Since the flow is a direct function of the Lake Erie water elevation , it typically peaks in late spring or early summer . During the summer months , at least 100,000 cubic feet ( 2,800 m ) per second of water traverses the falls , some 90 % of which goes over the Horseshoe Falls , while the balance is diverted to hydroelectric facilities . This is accomplished by employing a weir -- the International Control Dam -- with movable gates upstream from the Horseshoe Falls . The falls ' flow is further halved at night , and , during the low tourist season in the winter , remains a minimum of 50,000 cubic feet ( 1,400 m ) per second . Water diversion is regulated by the 1950 Niagara Treaty and is administered by the International Niagara Board of Control ( IJC ) . </P>
<P> The peak flow over Horseshoe Falls was recorded at 225,000 cubic feet ( 6,400 m ) per second . The average annual flow rate is 85,000 cubic feet ( 2,400 m ) per second . Since the flow is a direct function of the Lake Erie water elevation , it typically peaks in late spring or early summer . During the summer months , at least 100,000 cubic feet ( 2,800 m ) per second of water traverses the falls , some 90 % of which goes over the Horseshoe Falls , while the balance is diverted to hydroelectric facilities . This is accomplished by employing a weir -- the International Control Dam -- with movable gates upstream from the Horseshoe Falls . The falls ' flow is further halved at night , and , during the low tourist season in the winter , remains a minimum of 50,000 cubic feet ( 1,400 m ) per second . Water diversion is regulated by the 1950 Niagara Treaty and is administered by the International Niagara Board of Control ( IJC ) . </P>
which of the great lakes flows into niagara falls
which of the great lakes flows into niagara falls
Lake Erie
Lake Erie