The water coming through the spillway at Leaburg Dam looked a bit wild. We have had a lot of rain. It called to mind the idiom, "water over the dam", which has the same meaning as "water under the bridge."

Here is quote from The Free Dictionary, by Farlex - "WATER OVER THE DAM"

"Also, water under the bridge. Something that is over and done with, especially an unfortunate occurrence. For example, Last year's problems with delivery are water over the dam, or Never mind that old quarrel; that's water under the bridge. These metaphoric phrases allude to water that has flowed over a spillway or under a bridge and thus is gone forever. The first term was first recorded in 1797; the variant dates from the late 1800s." http://idioms.thefreedictionary.com/water+over+the+dam)