124 



GEOLOGICAL SURVEY OF ALABAMA. 



Minimum monthly discharge of Black Warrior River at Cordova, 

 Ala., with corresponding net horse power per foot of fall on a 

 water wheel realizing 80 per cent, of the theoretical power. 



[Drainage area, 237 square miles.] 



1900 



1901 



NOTE. To find the minimum net horse power available at a shoal 

 on this stream, near this station, for any month, multiply the total 

 fall of the shoal by the "Net H. P. per foot of fall" in this table for 

 that month. 



3. SURVEY OF BLACK WARRIOR RIVER, ALABAMA. 



The Black Warrior River is formed by the junction of the 

 Mulberry and Sipsey forks of Black Warrior at Old Warrior 

 Town in Walker County, Alabama, and runs in a southwesterly 

 direction past Tuscaloosa to Demopolis, Ala., at which point it 

 enters the Tombigbee River. Above Tuscaloosa it is known as 

 the Black Warrior River, and below Tuscaloosa as the Warrior 

 River. 



The accompanying profile is made from the surveys of the 

 Corps of Engineers, U. S. A. 



A great deal of work is being done by the Government on this 

 river in order to make it navigable as an outlet to important 

 coal fields above. 



In the 92 miles from Old Warrior Town to Tuscaloosa, there 

 is a fall of 158 feet. The distribution of this fall is showm by 

 the following table, giving distances in miles above Tuscaloosa 

 and elevations of water surface above sea level. 



