On Tue, 18 Aug 2009 07:12:19 -0500, wrote:

Big lock. Any idea what the vertical lift is ?

Quimby's will list the vertical lift for each of the various locks,
and I'm sure that Quimby's gets their info from the Army Corp of
Engineers. And as you probably know, those figures are averages. The
lift will vary based on various conditions apparently. We guessed
that we were raised about 45' on this one. I don't think any of us
checked the Quimby's to see what the official lift is.

According to Wikipedia max lift is 75 ft:

http://en.wikipedia.org/wiki/Kentucky_Dam#Capacity

That's a very big lock, about to get even bigger according to the
write up. We were in a 65 foot lock on the Ottawa River once and that
was a monster.

http://www.stlawrencecruiselines.com/index.cfm?page=attractions&attraction=7