ELECTEIC POWER FROM THE MISSISSIPPI RIVER CLARK. 209 



for by public service corporations of St. Louis. The transformers 

 are to be connected up for three-phase current and to deliver current 

 to the transmission lines at a potential of approximately 100,000 volts. 

 Step-down transformers will be installed for delivering current at 

 a suitable voltage for lighting the power house and operating 

 auxiliary motors. 



The transmission line to St. Louis will run from Keokuk along the 

 east bank of the river about 155 miles to a point in the former city, 

 and will consist of steel towers carrying two circuits, each capable of 

 handling at least half the power specified. 



For the ultimate development to be installed in the power house 

 as above described there are planned a total of 30 turbines and gen- 

 erators and 4 or more exciter turbines and exciters for the gener- 

 ation of at least 200,000 delivered horsepower. 



LOCK AND DRY DOCK. 



The lock and dry dock, as indicated on the map accompanying this 

 article, are being constructed on the west bank of the river in ac- 

 cordance with plans approved by the Secretary of War. These plans 

 call for a concrete and steel lock 400 feet long from gate to gate, 110 

 feet wide, and capable of lowering vessels about 40 feet. The lock 

 if; to be equipped with 1 steel gate downstream, and 2 on the upstream 

 end, the one farthest up acting as a guard for the upper lock gate. 

 The lower gate arches upstream; the upper gates are straight. In 

 the masonry of the side of the lock runs a culvert with laterals ex- 

 tending beneath the lock and valves to regulate the intake and out- 

 flow of the water. The dry dock is to be built between the lock and 

 the bank of the river, a space roughly 463 by 140 feet inside dimen- 

 sions. The walls, of course, are of concrete. A separate small hy- 

 draulic power plant will provide power for operating the lock gates 

 and machinery connected with the lock and dry dock. 



In addition to building the lock and dry dock the company has 

 obligated itself to carry out certain improvements in channel facili- 

 ties immediately below the dam and upon certain conditions to pay 

 over to the Government a sum of money for a similar purpose. 



CONCLUSION. 



It is not the purpose of this paper to place upon the construction 

 of this dam and powerful hydroelectric plant in the Mississippi Val- 

 ley an industrial significance. It is, nevertheless, true that this 

 development is placed in a region heretofore unsupplied with hydro- 

 generated electric power. The size of the development will enable 



97578°— SM 1910 14 



