AVAILABLE AND DEVELOPED WATER POWERS 19 



ing developments of less than 1000 H.P. each, as computed by the 

 Bureau of Corporations and given in Table IV, is 4,016,127 H.P. 

 Of this, 2,961,549 H.P. is classed as " commercial " power, and 

 1,054,578 H.P. as " manufacturing " power. Adding 2,000,000 

 H.P. to represent the power of developments of less than 1000 

 H.P. each, gives a grand total, in round numbers, of at least 

 6,000,000 H.P. and possibly 6,500,000 as the total water power of 

 the United States developed and under construction. 



There is a marked geographical concentration of developed 

 water power. Thus, nearly 50 per cent of the developed " com- 

 mercial " water power of the country is located in five States as 

 follows: 



Per Cent 



California 14 



New York 13 



Washington 10 



Pennsylvania 6 



South Carolina 5 



Total 48 



An even more marked concentration of developed water power 

 employed in manufacturing is shown by the following summary. 



Per Cent 



New York 30 



New England States 36 



Minnesota and Wisconsin 17 



South Carolina 5 



Total 



The accompanying map, Fig. 6, shows the location of water- 

 power developments and power sections of streams in the United 

 States. 



