. Story of Lee County, Iowa. s lock are 52 feet high and vary in thickness from 8 to 33 north of the lock and next to the Iowa shore is the drydock, 150 by 463 feet. On the last day of May, 1913, the last concrete in the dam wasplaced in position. As soon as it set the water above was graduallyraised and flowed through the spillways for the first time on June 3,1913. Nine days later the lock was put into commission by the pas-sage at one time of two of the largest steamboats on the UpperMississippi. On July i, 1913, electric current was delivered to The great power plan


. Story of Lee County, Iowa. s lock are 52 feet high and vary in thickness from 8 to 33 north of the lock and next to the Iowa shore is the drydock, 150 by 463 feet. On the last day of May, 1913, the last concrete in the dam wasplaced in position. As soon as it set the water above was graduallyraised and flowed through the spillways for the first time on June 3,1913. Nine days later the lock was put into commission by the pas-sage at one time of two of the largest steamboats on the UpperMississippi. On July i, 1913, electric current was delivered to The great power plant was in operation and the dream ofyears had become a reality. A formal celebration of the greatachievement was held at Keokuk on August 25, 26, 27 and 28, 1913,the second day of the proceedings being the day when the great damwas dedicated to the use of mankind. Governor Clarke, of Iowa, andGovernor Dunne, of Illinois, were prominent participants in theexercises, and thousands of visitors came to visit and inspect the IUMO by ,Z The Government lock at Keokuk, built at the cost of the Mississippi River Power Com-panv, to become the property of the United States upon completion. This lock is in the Panamaclass, having the same width but a much higher lift than any lock on the Isthmus. HISTORY OF LEE COUNTY / 249 Soon after work was commenced the plant was placed under themanagement of the Stone & Webster Management Association, whichmanages more than fifty public utilities in all parts of the UnitedStates, and some of their best trained and most experienced men weresent to Keokuk to look after the service. Transmission lines havebeen built to Fort Madison and Burlington, Iowa; Dallas City,Nauvoo, Warsaw, Quincy and Alton, Illinois; Hannibal and , Missouri, and light and power are also furnished to the citiesof Keokuk and Hamilton. The large body of water held in check by the dam, extendingup the Mississippi to the City of Burlington, has been named LakeCoop


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