[en] In the fall of 1978, an airborne reconnaissance radiometric and magnetic survey was flown by geoMetrics in western Colorado and eastern Utah as part of the Department of Energy's National Uranium Resource Evaluation program. A total of 13,390 line miles were flown in the four 1⁰ x 2⁰ topographic maps - Salina, Moab, Montrose and Leadville - encompassed by the survey area. The survey area includes portions of the Colorado Plateau and Southern Rocky Mountains Physiographic Provinces. A series of uplift and basin structures are distributed throughout both provinces. Thick sequences of relatively flat-lying, Phanerozoic age, sedimentary and some volcanic materials overlie crystalline basement rocks in most of the Colorado Plateau, but are relatively thin in most of the Southern Rocky Mountains. Precambrian crystalline basement rocks are exposed over some of the uplifted areas. Radioactive mineral deposits of many different types are reported. The literature consulted included information on about 1,300 occurrences of radioactive minerals and/or anomalous radioactivity within the project area. About 1,048 of these occurrences are mines which have produced or are now producing uranium. About 917 of the productive deposits are in the Moab Quadrangle, about 115 in the Salina Quadrangle and eight each in the Montrose and Leadville Quadrangles. A total of 582 grouped statistical values in the uranium window meeting the criteria established for valid anomalies are displayed and discussed in the interpretation section: 181 in Salina; 88 in Moab; 220 in Montrose; and 93 in Leadville. Some anomalies are associated with known uranium occurrences and mines such as the Uravan Belt, but most are not and are scattered across the entire range of Proterozoic and Phanerozoic rocks exposed in the survey area. Residual magnetic data generally delineate the major geologic structures present as well as providing more detailed information concerning specific rock units