The new 290-ft Boise Airport Air Traffic Control Tower is not only a highly visible landmark in Treasure Valley, it’s also the tallest building in Idaho. Photo: Layton Construction Layton�s biggest safety challenge was going 289 ft vertical, so crews brought in the largest crane in the valley and reviewed safety issues at weekly subcontractors meetings. Photo: Joe Evancho With the ability to control the sky within a 5-mile radius and up to 30,000 ft above the surface of the airport, the new $13-million tower will serve approximately 180,000 takeoffs and landings a year. Related Links: Spanning the River The