They must have been meaning water volume, or else maybe it was written prior to the creation of KY Lake. Isn't Cumberland much older?

Here is some facts about KY Lake:

"Recreation
Kentucky Lake is a magnet for vacationers and fishermen from a wide area of mid- America, with recreation use amounting to some 17 million visits each year. Along its nearly 2400 miles of cove-studded shoreline are many boat docks and resorts..."

and

"Kentucky Dam creates the largest manmade lake in the eastern United States. It backs up the Tennessee River for 184 miles and creates a lake that stretches south across the western tip of Kentucky and nearly the entire width of Tennessee. At maximum normal operating level, Kentucky Lake covers 160,300 acres."

Here's the link:

http://www.kentuckylake.com/kylake/kylake.htm

Obviously, I understated the size of the lake.

Danny