By Paul H. Meier (Paul) on Monday, July 14, 2008 - 06:26 pm:
All five Tamarack shafts were vertical. They were sunk to reach the Calumet Conglomerate Lode at depth. I have no definitive answer about the plug at 1100 feet. There are several possibilities, but they are only speculation on my part. Tamarack 5 was kept open for the duration of C&H operations in and around Calumet. From 1923 to 1968 it served as a pump shaft to keep the Calumet Conglomerate Lode and Osceola Lode mines dewatered. There may have been some underground connections to the Kearsarge Lode. Maybe one of the guys that worked for C&H can tell us. They may also know the reason for the plug.
By Bryan Suits (Bhsuits) on Wednesday, July 16, 2008 - 06:13 pm:
If anyone cares for more: Technical details of McNair's experiments in Tamarack shafts 2, 4, and 5 can be found starting at http://www.phy.mtu.edu/alumni/history/narr_3.html .