AREA COVERED IN STUDY: 



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. .BRITISH COtfiMSA 



T v,waS*ngton 



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CALIFORNIA 



O. }S 50 TS w c 



SCALE — MILES 



OREGON 



DOMI MON OF _ CANAD A 

 UNITED STATES 



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IDAHO 



NEVADA 



Figure 1. — Columbia River Basin, showing area covered in study. 



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