WATER POWER 189 



of the acts of 1906 and 1910, plus nearer approach 

 of industry to water sources, plus long strides in 

 power transmission, to produce our present law and 

 the immense development under it. 



The annual growth of power development from 

 1910 to 1923 was reasonably uniform except in the 



GRAPHIC STORY OF THE GROWTH OF WATER POWER 



1.200,000 



U 00,000 



1,000,000 



800,000 



800,000 



700,000 



eoo.ooc 



800,000 

 400,000 

 100,000 



mooo 



100,000 

 



UNITED STATES 



DEVELOPMENT REQUIRING AUTHORIZATION 

 BY THE FEDERAL GOVERNMENT 



1911 1912 ms 



years 1913 and 1919. The story is told graphi- 

 cally in the diagram on this page which was compiled 

 by the Federal Power Commission from Geological 

 Survey data. The shaded portions show develop- 

 ment on private lands. The increase of 1913 was 

 due to the development of the famous Mississippi 

 River dam at Keokuk, Iowa, and the works on Big 

 Creek, California. The increase in 1919 was due 

 largely to new installation at Niagara Falls. The 

 great increase beginning in 1923 is accounted for by 



