688 EEPOET UNITED STATES GEOLOGICAL SUEVEY 



Table VI. — Slopes of streams — Continued. 



From mouth 

 of Big Sandy. 



Elevation. 



Fall per 

 mile. 



JOHN DAY'S KIVEE. 



Miles from 

 mouth. 



5o 



Mouth of McDougal's Creek . 

 Mouth 



BALT EIYER. 



Its mean fall per mile from the mouth of Crow Creek to its mouth 

 is 24.5 feet. 



BLACKFOOT EIVEE. 



First crossing of Lander's road, near head of stream 



Second crossing of Lander's road. .. 

 "Where Landers road finally leaves. 



POETNEUF EIVEE. 



Crossing of Lander's road 



Miles. 



57 

 49 

 32 

 12 

 



Miles from 

 preceding. 



Head of hend 



Foot of lower bend (enter Snake Kiver Plains) . 



Feet. 

 7,783 

 7,337 

 6,761 

 5,400 



6,850 

 6,550 

 6,266 

 6,069 

 5,600 



5,760 

 5,470 

 5,367 

 5,086 

 4,565 



Feet. 



49.6 

 52.0 

 440 



37.5 



17.0 



9.6 



39.1 



58.0 



8.6 



20.1 



16.8 



Most of the above latitudes and longitudes are approximate, having 

 been scaled off from the map. 



