MONTANA STATE LIBRARY 



3 0864 0015 4150 



SUPPORT OF AQUATIC LIFE USES IN THE UPPER 



BOULDER RIVER (YELLOWSTONE RIVER DRAINAGE) 



BASED ON DIATOM SPECIES COMPOSITION AND 



DIATOM ASSOCIATION METRICS 



Prepared for: 



State of Montana 



Department of Environmental Quality 



P.O. Box 200901 



Helena, Montana 59620-0901 



Project Offi'-er: Pat Newby 



DEQ Contract No. 200012 



'TA7E DOCUMENTS COLLECTION 



^ ■ im 



HFi A?P,f- 6th AVE. 

 HELENA, MONTANA 59520 



Prepared by: 



Loren L. Bahls, Ph.D. 

 Hannaea 

 1032 Twelfth Avenue 

 Helena, Montana 59601 



November 1999 



Printed on Recycled Paper 



