History of the Navy test facility in Bayview, Idaho
For more than 50 years, the U.S. Navy has used the deep and quiet waters of Lake Pend Oreille to test the acoustical properties of submarines, surface ships and their propulsion systems. Although the facility has invited visitors over the years, it is still a secure military installation where most of their large scale vehicles are kept indoors, away from prying eyes.
A Navy spokeswoman said the Feb. 11 incident remained under investigation Tuesday, but a buildup of ice may have been a contributing factor. The Naval Safety Center classified the incident as a “Class A” mishap, meaning the vessel may be totally lost or damage may exceed $2 million.