Arapahoe County, Colorado. County administration. Buildings Ground broken for $3.5 million administration building at S. Santa Fe Drive and S. Prince St. Post Ag 15, 1975 p.26 Arapahoe District Attorney deplores loss of 9 of his 20 deputies is 8 months. Post F 3, 1976 p.17 Description of new administration building scheduled to open in month. Post Ja 15, 1977 p.52 New: administration building. opens Je 27, 1977. Post Je 24., 1977 p.26 Post Je 28, 1977 p,13