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Geologic and hydrologic aspects of tunneling in the Twin Cities area, Minnesota
Ralph F. Norvitch, Matt S. Walton
1979, IMAP 1157
This report presents the results of a pilot study of geologic and hydrologic aspects of tunneling in part of the Minneapolis-St. Paul (Twin Cities) metropolitan area, Minnesota. The Minnesota Geological Survey collected, compiled and interpreted geologic and engineering-test data and the U.S. Geological Survey complies and interpreted hydrologic data. The...