1971 PR (Provo River/Duchesne Tunnel)
The 1971 PR (Provo River/Duchesne Tunnel, Wasatch-Cache National Forest) vertical, black and white (panchromatic) aerial project was acquired by the U.S. Forest Service (USFS) at a scale of 1:4800 (1 inch equals 400 feet) and consists of no known index sheets and 79 images.
