On July 21, 1948 a Boeing B-29 Superfortress (F-13)  crashed in to Lake Mead. The Bomber was modified from a B-29 into a F-13. The "F" meant that it was modified for photo reconnaissance. It was on a special mission to conduct atmospheric research using an instrument called the "Sun Tracker".  Painted on the nose of the plane was the words "Cosmic Ray Research".  The plane operated as high as 30,000 feet down to just about as low as you can fly.

While on mission, the plane was making a very low pass over the Lake Mead surface with what is described, "glass like" when it hit the water.  The plane was traveling at about 250 mph as it crashed and skipping across the surface for over a quarter of a mile.  Five men on-board escaped via life rafts before the plane sank in water over 170 feet deep.  The crew was rescued from the lake six hours later and was instructed not to disclose any details of the flight, its mission or its loss. As the mission was classified, these details were not released until fifty years later.

In 2001, a private dive team searching for the B-29 using side-scan sonar found the wreckage in the northern arm of Lake Mead. Because the bomber lay inside a National Recreation Area, responsibility for the site fell to the National Park Service. Due to the cold deep water, the plane  has been well preserved. Currently the site is off limits to divers.

Photo By: Wikipedia.com – Public Domain