[en] As part of the Department of Energy (DOE) National Uranium Resource Evaluation (NURE) Program, LKB Resources, Inc. has performed a rotary-wing, reconnaissance high sensitivity radiometric and magnetic survey in north-west Colorado. The 1:250,000 scale NTMS Craig quadrangle was surveyed. A total of 3,039 line miles of data were collected utilizing a Sikorsky S58T helicopter. Traverse lines were flown in an east-west direction at 3.0 mile spacing, with tie lines flown in a north-south direction at 12 mile spacing. The data were digitally recorded at 1.0 second intervals. The NaI terrestrial detectors used in this survey had a volume of 2,154 cubic inches. The magnetometer employed was a modified ASQ-10 fluxgate system. The radiometric data were normalized to 400 feet terrain clearance. The data are presented in the form of computer listings on microfiche and as stacked profile plots. Profile plots are contained in Volume II of this report. A geologic interpretation of the radiometric and magnetic data is included as part of this report