Air Force Plans to Start Building New Over-the-Horizon Radars in Oregon in 2028 April 21, 2025 | By Unshin Lee Harpley The Air Force has tapped sites in Oregon to build its first two new Over-the-Horizon Radars, capable of detecting inbound missile threats from up to 4,000 nautical miles away. The service is hoping to start construction by the end of 2028.