I took this photo of a pleasure boat on Lake Mead back in 2006. The white layer of rock shows just how low the water level had dropped. The water has bleached the rock and as the level has dropped so the bleached layer has been exposed.
The photo is taken from the top of the Hoover Dam. Since i took this photo the bypass bridge has been competed and traffic can now avoid winding down into the canyon to cross the dam then climb up the other side. I've not been back since the new bridge was opened but I can imagine it's now a lot safer for pedestrians visiting and walking across the dam.
Just this side of the pleasure boat is a line of buoys and below that a red boom that both span the lake from one side to the other. These are to prevent boats entering the catchment pools for the dam.
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Production Data
Camera: Canon EOS 5D
Lens: Canon EF17-35mmf/2.8L
Processing: Lightroom 3.6
Processing: Photomatix 4.02
Processing: photoshop CS5
Processing: Topaz Adjust 5