ILLIISTRA-TIONS 



FIGURE Page 



lo Colianbia Rl^er Systomo oooooaoooooooaooao 1 



So Ar®8-S One Q.nd TwOc oooooooooooooooooooo 6 



3o Salmon River, a tributary of the Big Sandy River o o u o « 16 



4o Area II = Sub Area Willamette o ooooaooooooaao 26 



5o Lumber mill dam at Carltong Oregon, on North Fork, 



lamhixi. Rxver© ooooooooooooooooooooo ^o 



6o Sawmill dam near the mouth of Mary's River, at Corvallis, 



Ol^O^On OOOOOOOOOOOOOOOOOOOOOOOOO OO 



To A shallow bedrock falls on Sharps Creeko ooooooo.o 82 



