There are several ways engineers calculate the volume of a lake. You need to know the surface area of the lake and the depth and contour of the lake.
http://www.michigandnr.com/publications/pdfs/IFR/manual/SMII%20Chapter12.pdf
There are approximately 696 billion gallons of water in Lake Winnebago.
Truman Lake in Missouri has about 11.32 million gallons of water in it. There are several types of fish in the lake as well.
Approx 756,993,907,779 gallons
Lake Pleasant, Arizona has 653062 acre-feet which is 212,801,184.619.474 gallons.
Lake Okeechobee holds one trillion gallons of water. It is the largest lake in Florida and is the second largest body of fresh water in the contiguous United States.
There are 6 quadrillion gallons of water in Lake St. Clair. That is one fifth of the world's fresh surface water.
There are hundreds of lakes that could have ten billion gallons of water. Lake Superior in Michigan is one of these lakes.
90 millon gallons
The answer will depend on how deep the lake is!
20000
Approximately 8,146,286 gallons of water.
Salt lak