Version history for Scientific Investigations Report 2014–5047 By Joanna N. Thamke, Gary D. LeCain, Derek W. Ryter, Roy Sando, and Andrew J. Long Hydrogeologic Framework of the Uppermost Principal Aquifer Systems in the Williston and Powder River Structural Basins, United States and Canada ----------------------------------------------------- Version 1.0: Posted On-line June 17, 2014 ----------------------------------------------------- Version 1.1: Posted On-line December 1, 2014 Figure 1-2. 'Water Well' layer modified. Appendix 3. Updated 'Aquifer' column. Added 5 columns: 'Source ID', 'Unique ID', 'Used in potentiometric surface', 'Site visit by USGS', and 'Rate of water-level change per year (ft/yr)'.