 In the 21st century, the U.S. Department of Education recognizes 34 tribal colleges, the majority of which are two-year institutions located on reservations.They now enroll more than 30,000 students, and some institutions have formal agreements with four-year universities to enable students to pursue BA degrees.The site of D-Q was previously used as a United States Army communications facility, known at various times as the Sacramento Valley Radio Transmitting Station; West Coast Relay and Transmitter Station; U.S. Army West Coast Relay and Radio Transmitting Station; and the U.S. Army Strategic Communications Command - CONUS, Davis California, Facility.