ism 



Hannaea 



1032 Twelfth Avenue • Helena. MT 59601 • (406) 443-2196 

 e-mail: lbahls0selway.umt.edu 



March 7, 1999 



Ms . Carol 

 Monitoring ^^^nd 

 Department Cif En 

 P.O. Box 2 0Cr90I:.v/ • 

 Helena, MT 5^620 H 



lanagement Bureau 

 lental -Quality 



Big Sprin§^^ Creek 



Re; 



Dear Carol, 





Enclosed is a copy 'of my 

 collected last summer from B 



Diatom metrics indicatfted full 

 five of the stations tl:?a.t were s 

 made impairment at the tv*,Q upst 

 impairment --caused by silC^tion- -at 

 Pollution-tolerant green alfefae and d 

 nutrient enrichment below Le^stown. 



KJt&K. 



'^^W:^$ 







n analysis of per iphy tori sample's 

 Sp^hg Creeks, near Lewistowm'-W^v^^' •' 



of aqu^'tic life uses at all 

 , with:-:^p measurable *man-;;, 

 s ■ and only minor -' ■ 

 three downstream" sites .' '" 



iridic&ed minor ■^'•-^^^'^'^^-^•■'•4^"'^^ 





.Please let me know if you have any quest: 

 r?'""- enclosed. Thanks for the work. -"^i. :.--■. 



m" Sincerely, 



My iELVoice'"is ' ""', 



M.X-i'v.ci* 



\^ ^ • .• -''-Qf^-'^ii^:^^ 



;/ ■•-■'■S'r-- 



'-•Lor en L . Bahl s , ; : 'Ph . D 

 Phycoiogist 



Enclosures 



/:.>'';;",--.::v5i'-;^j^'iV 





V Enclosures: Big Spring preek. Report and ';Invqice 









(M^. 







;-,i:-/fi:>'iii-- 







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V'---'. ' >f ■ 



frustuiia bahlsii Bdlund and Brant 





