Owyhee reservoir info?

[elkmagnet]

A link to the details of the owyhee project.

http://www.usbr.gov/projects/Project.jsp...ee+Project

I found this info to be particularly interesting- "The total capacity of Lake Owyhee is 1,120,000 acre-feet (active 715,000 acre-feet)."

I can't seem to find a definition for (active acre feet) but I'm guessing it is the actual usable amount of water in the res.
1,120,00 - 715,000 =405,000???

Is it possible for owyhee to have 405,000 acre feet left in the bottom after the canals will no longer flow???

Being a river canyon with the dam at the low point would make you think otherwise.

Any enlightened minds care to weigh in on this.
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