The shutdown of HAARP, a project created by the late Sen. Ted Stevens when he wielded great control over the U.S. defense budget, will start after a final research experiment takes place in mid-June, the Air Force said in a letter to Congress Tuesday.

While the University of Alaska has expressed interest in taking over the research site, which is off the Tok Cutoff, in an area where black spruce was cleared a quarter-century ago for the Air Force Backscatter radar project that was never completed. But the school has not volunteered to pay $5 million a year to run HAARP.

Responding to questions from Alaska Sen. Lisa Murkowski during a Senate hearing Wednesday, David Walker, deputy assistant secretary of the Air Force for Science, Technology and Engineering, said this is 'not an area that we have any need for in the future' and it would not be a good use of Air Force research funds to keep HAARP going. 'We're moving on to other ways of managing the ionosphere, which the HAARP was really designed to do,' he said. 'To inject energy into the ionosphere to be able to actually control it. But that work has been completed.'