Grey Line also offers HOover dam tours which I believe include a stop at some out of the way casino (Slots are tight, don't play there) and a small Native American history museum.
It's the DAM you want and if you feel ambitious you can take hard hat tour.
OH I wish we could have an F-T get together so one event can be the DAM! hard hat tour. We can earn miles by charging to our airline/hotel linked cards! :0
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MEOW! MEOW! MEOW!!!