Acknowledgements 



This project was flmded through a Challenge 

 Cost-Share agreement between the Bureau of 

 Land Management Dillon Field Office and the 

 Montana Natural Heritage Program, Montana 

 State Library. Additional support was provided 

 by the Montana Department of Environmental 

 Quality Mine Waste Cleanup Bureau and the 

 USGS-Biological Resources Division, 

 Midcontinent Ecological Science Center. 



We were aided in the field by Sam Martinez, Tom 

 O'Shea, Michelle Brown, and Janelle Com. Tom 



O'Shea (USGS-BRD) kindly provided on loan 

 some of the data loggers used during this study. 

 We also thank Lee Flath (Lewis and Clark Cav- 

 erns State Park) for granting access to the Gyp- 

 sum adits, and Marian and Max Johnson (Ravalli) 

 for permission to visit the McDonald Mine adits. 

 Cedron Jones (MTNHP) produced the map. 



The report was reviewed and edited by John 

 Carlson (MTNHP) and Joy Lewis (MTNHP), 

 and produced with the help of Katrina 

 Scheuerman(NRIS). 



