1909] 



071 the Americans and the Panama Canal. 



691 



Gatun, an excavation of 5,139,304 cubic yards is necessary. Some 

 3,500,000 cubic yards have already been taken out. The laying of 

 2,096,000 cubic yards of concrete will commence early in August 



Drawing showing Gatun Dam with Locks and Spillway as 

 THEY will Appear when Completed. 



1909. The three twin locks, extending from the dam in a due 

 northerly direction, will each|be 1000 feet long, 110 feet wide, and 

 with 41^ feet of water over the sills. 



The dam, according to the latest plans, is to be 1200 feet wide at 



