Flight line conductivity depth image (CDI) and inversion (INV) WinZip* files, R-CDI.ZIP and R-INV.ZIP, each contain Portable Document Format (PDF) and encapsulated Postscript (EPS) files. The cutoff boundary of the deepest-sensing depth along any flight line is represented by the lowest depth imaged in the CDI cross sections. This same boundary is represented in the INV cross sections as a dashed line, so that the observer is cautioned against using any resistivity variations below this depth from the resistivity inversion cross sections. The Z-coordinate units for each of the cross sections is elevation above sea level in 100's of meters. The X-coordinate unit for each of the cross sections is projected UTM km based on the 1866 Clarke spheroid and the NAS-B 1927 Western United States datum. The upper solid undulating line above each resistivity cross section represents the flight line elevation. The lower solid undulating line above each cross section represents the topographic elevation. Upon opening the PDF files with Adobe* Acrobat Reader version 4, the user is first presented with the northern most flight line cross section. Paging through the PDF file will display the next flight line cross section to the south. All these images are annotated with tick marks, distance scale, color scale bar, and brief explanation. Color scales are the same for all images from all surveys. These images are provided at a scale of 1:100,000 with a page size of 21"x8"(landscape) and will need to be resized by your printer software to fit smaller page sizes. *Trade names are used for descriptive purposes only.