It has been raining for a month. The large flood control lake nearby has been full for a while. A couple of nights ago a huge storm system parked over Austin and the area to the north west which also happens to be upstream. I took the following graph from LCRA, who operates the dam.

I was out in the area Thursday night (technically Friday morning) and I decided to lug all the camera gear out and try to get a cool night photo of the release from the dam. The dam had four flood gates open and max hydroelectric power generation running for a total release of 30,000 cubic feet of water per second. This equates to around 225,000 gallons per second or 13.5 million gallons per minute.

Both of the following photos were taken with 2.5 sec exposure and f/2.8 aperture. I took quite a few, but these were my favorite.