36 GEOLOGICAL SURVEY OF ALABAMA. 



may be flooded. All of which can be determined only by spe- 

 cial investigation and surveys. It will be safe, however, to as- 

 sume that a practicable site for a dam 40 feet high or under, 

 can be found in the vicinity of any location which may be se- 

 lected, and the power obtainable can be estimated by using the 

 volume of water, or its equivalent net horse power per foot 

 of fall, and the proposed head to be developed. 



The water supply or discharge of Tallapoosa River at dif- 

 ferent points may be closely approximated from the foregoing 

 records of Milstead, Susanna, and Sturdevant Hydrographic 

 Stations, and also at Dadeville, and Alexander City stations, 

 on the tributaries. 



