How much money was found when niagara falls was drained?

In June 1969, U.S. engineers diverted the flow of the Niagara River away from the American side of the falls for several months. The temporary dam can be seen in the top-right of this photograph.

For six months in the summer and fall of 1969, Niagara’s American Falls were “de-watered”, as the Army Corps of Engineers conducted a geological survey of the falls’ rock face, concerned that it was becoming destabilized by erosion. These stark images reveal North America’s iconic – and most powerful – waterfall to be almost as dry as a desert.

When crews shut down the falls in 1969, they found two bodies and millions of coins, most of which were removed. (As were the human remains, of course.)

Source, Google.