Please see the blog here Lake Powell Water Release
for background on flood. I was going to add the photos to the previous blog, but after being there for several hours today, decided they needed their own space!
The jet tubes are releasing 300,000 gallons of water a second. Yup, a second.
The first one is from a Glen Canyon Dam downstream viewpoint called "The Whitehouse" by the locals. Getting there is half the fun ~ it's a wee bit of a walk down steep rock steps, but beautiful. The image is HDR.
This picture was taken behind the Carl Hayden Visitors Center at Glen Canyon Dam looking @ 700 feet down to the bottom of the river. The workers are monitoring the flows. Each hollow jet tube is 15 feet in diameter.
Close up of the 15 foot hollow jet tubes ~ yes this is what 300,000 gallons of water a second looks like....
Lastly here is a panorama from this afternoon of the dam. The city of Page is on the right, the Glen Canyon Bridge is 700 feet above the river level, and 583 feet of the dam can be seen.