United States Department of the Interior 

 Oscar L. Chapman, Secretary 

 Fish and Wildlife Service 

 Albert Mo Day, Director 



Special Scientific Report - Fisheries 

 No. 30 



POLLUTION IN THE LOTOR COLIMRIA BASIN IN 1948 

 WITH PARTI CirW.R REFERENCE TO THE WTLLAJTETTE BASIN 



By 



Frederic F. Fish 

 Formerly Chief, Western Fish-Cultural Investigations* 



ar:d 

 Robert Ro Rucker 

 Fishery Research Biologist 



CONTENTS 



lo A Survey of Pollution Problems in the Lower Columbia Basin. 



J.I0 i94o otudieS. ..•ooaaee««««..*..e 



A. Reconnaissance Survey of Willamette Waterhead • 

 B« Interpretation of Res alts .oo.o.oo. 

 1» Main-Stem Willamette River, o . . . . <> 

 2e Major Tributaries .oo........ 



a. Coast Fork Willamette Basin . . . < 



bo Middle Fork Willamette Basin, , . . 



Co McKeniie River Basino o . . . . . . 



do Long Tom River Basino o « o . . . . 



Bo Calapooya River oeo.oooo.. 



fo Marys River 000 00. . 



go Luckiamute River o e.oce.o.. 



ho Rickreali Creek e..o.o«... 



io Santiam River Basin ..o.o.oo 



jo Yamhill River Basin .o.o.... 



ko Pudding River Basin o....... 



1« Molalla River Basin oooooo.. 



mo Tualatin River Basin* o . . . • . . 



n. ■fjlackamap. River Basin o ..... <, 



IIIo Summary and Recommendations .00 



17. Literature Cited. <><>«. .........oo 



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* Now with Federal Security Agency, Pulbic Health Service. 



