Tables Showing Difference of Level in Feet: Corresponding to a Given Angle When the Distance Is Read in Metres Or Feet, and for Horizontal Reductions, for Use with Stadia
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John Augustus Ockerson was an American engineer and a member of the Mississippi River Commission (1898-1924).
Background
John Augustus Ockerson was born on March 4, 1848, in the province of Skane, Sweden, the son of Jans and Rose (Datler) Akerson. When he was two years old, the family, together with a group of relatives and friends, emigrated to America with Chicago as their destination. On the trip overland from New York, both parents and the eldest son died of cholera. John was brought up by relatives who settled near Elmwood.
Education
John Ockerson received his early training in the Elmwood public schools. In the spring of 1864, when only sixteen, the boy enlisted in the 132nd Illinois Infantry, but was mustered out after less than six months' service. In January 1865, he again enlisted, this time in the 16t Minnesota Heavy Artillery, with which he served until the end of the Civil War. In 1869 he entered the civil-engineering course at the University of Illinois, graduating in 1873.
Career
After the university, John Ockerson became principal assistant engineer in the federal Great Lakes Survey, for which he had been recorder during a college vacation, and for five years was engaged in hydrographic, topographic, and triangulation surveys, including the survey for the famous jetties at the mouth of the Mississippi constructed by James Buchanan Eads. When the Mississippi River Commission was established in 1879 by act of Congress, Ockerson was appointed its principal assistant engineer in charge of surveys and physical examinations from the source of the river to the Gulf. Nine years later, when the work of the Commission temporarily slackened because appropriations were reduced, he left the service for a short period to engage in a mining venture in Colorado. He returned to his old position in 1890, however, and occupied it until 1898, when he was appointed to a membership on the Commission, which he held until his death.
Ockerson's expert technical knowledge of all the problems connected with river improvement made him at once a leading member of that body and toward the end of his period of service he was the dominant figure on the Commission, usually heading its most important committees. In his later years, Ockerson was internationally recognized as a leading authority on river and harbor improvement, navigation, and related problems, and developed a large consulting practice at home and abroad. One of his greatest individual achievements, undertaken in 1910, was the construction of levees to control the flood waters of the Colorado River, which threatened to overflow into the Salton Sea. This was not only an engineering achievement of the first magnitude, but since some of the construction and much of the hauling of materials had to be done in Mexican territory, was a task involving many delicate problems in international diplomacy and required administrative skill of a very high order. For the successful completion of this work, Ockerson received personal commendation from President Taft.
John Ockerson was the delegate from the United States to four International Congresses on Navigation (1900, 1905, 1908, 1912) and received many honors and decorations from foreign governments. In 1912 he was elected to the presidency of the American Society of Civil Engineers. His numerous contributions to technical literature were mostly in the form of official reports issued in connection with his work for the Mississippi River Commission. An especially elaborate report, on the opening and maintaining of navigation channels in rivers by hydraulic dredging, based as it was on original observation and experiment, will stand as one of the greatest contributions to this important field: "Dredges and Dredging of the Mississippi River" (1898).
He died at his home in St. Louis after an apoplectic stroke.
Achievements
One of John Ockerson's greatest individual achievements was the construction of levees to control the flood waters of the Colorado River, which threatened to overflow into the Salton Sea, in 1910.
One of Ockerson's greatest contributions to literary field was a report, based on his observations and experiments: "Dredges and Dredging of the Mississippi River" (1898).
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Membership
John Ockerson was a member of the Mississippi River Commission (1898-1924). He was the delegate from the United States to four International Congresses on Navigation (1900, 1905, 1908, 1912). Ockerson also was president of the American Society of Civil Engineers in 1912.
Personality
After coming to America, the family Anglicized the spelling of their name to Ockerson, conforming to the Swedish pronunciation.
John Ockerson was an outstanding personality; he possessed a powerful and commanding physique and unusual dignity and charm of manner. He was a gifted and persuasive talker on the platform or in private, and one of the most beloved as well as most highly respected members of his profession.
Connections
Ockerson was married twice: on November 3, 1875, to Helen M. Chapin, who died in March 1886, and on June 4, 1890, to Clara W. Shackelford.