Claim: Celilo Falls, submerged beneath the Columbia river in United States following the completion of The Dalles Dam in 1957, has a flow rate of 5,366 m/s; while the Inga Falls is the largest extant waterfall with an estimated flow rate of 25,768 m/s.
Evidence: Average annual flow was about 190,000 ft³/sec (5380 m³/s), and during periods of high water or flood, as much as 1,240,000 ft³/sec (35,113 m³/s) passed over the falls.