An excerpt from today's Las Vegas Advisor "Question of the Day"...

The questioner asked what happens to the money thrown into the fountains at various casinos. Here's part of the answer (would vinegar work??):

"TI discards everything they clean out of the Sirens Cove, as does Circus Circus Adventuredome from the water rides they have."

You read that right. Yes, we’ve found a casino (two, actually) that throws money away—on account of calcification and dirt.

Much the same holds true at Wynn Las Vegas. Vice President of PR & Advertising Jennifer Dunne writes, "Our engineering department has informed me that the coins removed from the water features are cleaned and given to charity. Some coins are damaged significantly due to hard-water deposits and/or erosion from chemicals in the water. These coins are not accepted by banks and therefore of no use in their current state to charity.