Matthias, F. T. (ed.) / The Wisconsin engineer
Volume 33, Number VIII (May 1929)
Plotz, R. S.
Alumni notes, pp. 288-289
The WISCONSIN ENGINEER Volume 33, No. 8 Alumni Notes By R. S. PLOTZ, c'30 Pontoon Bridge and New Structure Across Arkansas River World's Longest Pontoon Bridge Replaced Under Direction of CLARK DUNN, c'23 DUNN, CLARK G., c'23, resident D engineer for the Arkansas High- way Commission, sounded the death knell for the longest pontoon bridge in the world on January 17, 1929, when he opened to traffic a magnifi- cent steel and concrete bridge across the Arkansas river. The bridge was finished on New Year's Day, 1929, seven months ahead of the contract date. Seventy-two pontoons supported the old pontoon bridge which was 2,208 fcet long and carried an 18 foot road- way. It was held in place by heavy wire cables anchored to seven towers placed at intervals across the river. In order to save the bridge from destruc- tion in the time of high water it was built in 13 sections each of which could be towed by a specially con- structed ferry and anchored on the bank. First dirt for the new structure, which is one of the most important arteries of commerce for this entire section of Arkansas, was turned on November 30, 1927. Seven 214 foot six-inch steel trusses, one 362 foot steel draw span, and 160 feet of con- crete girder approaches now span the river's channel. The seven fixed spans have a twenty foot concrete deck with a seven foot concrete walkway on the downstream side. All piers were constructed by the pneumatic method and were sunk to bed rock which was found at approxi- mately 32 feet below low water level. Much of the steel work was con- structed on the bank and floated into position by means of two 40x90 foot barges with six foot gunnels. The spans were lowered into position on the piers by maneuvering the large barges into place and scuttling them. Approximately 23! hours was consumed by a steel gang of six men in the erecting, bolting, and pinning of each span. For 38 years the old pontoon toll bridge has acted as the main artery of the commerce of Dardanelle, Arkansas, but with the completion of this new structure under the contract of the Lakeside Bridge and Steel Company of North Milwaukee, Wisconsin, and the guidance of Dunn, a Wisconsin graduate, the city of Dardanelle hopes to expand beyond all expectations. CIVILS Bennett, William B., c'04, director of Research for the St. Louis Public Service Company, recently offered Wis- consin men a chance at two positions in his organization. Incidentally both Mr. and Mrs. Bennett will return to the University for the twenty-fifth reunion of the Jubilee Class to which they both belong. Crump, Arthur W., c'15, who is production superintendent of the American Appraisal Company of Milwaukee and San Francisco, recently left the Milwaukee office to take charge of the San Francisco office located in the Russ Building, San Francisco, California. Since leaving school Mr. Crump has been married and has two sons, one five and one ten years old. Ferguson, Phil M., C. E.'24, is associate professor of structural engineering at the University of Texas at Austin, Texas. Fess, P. J., c'12, a Madison contractor, has been awarded the contract for $330,733 of concrete paving from Lake- view to Madison, and Middleton to Sauk City. Geisse, Harlin J., c'17, who is an assistant chief engineer of the United States Navy, is now located at 217 North Princeton Avenue, Swarthmore, Pennsylvania. Halseth, C. M., c'11, who while in school was a member of Haresfoot Club, track team, cross country team, and University Glee Club, is now Chief Engineer of the Civil Engineering Division of the Byllesby Engineering and Management Corporation of 231 South La Salle Street, Chicago, Illinois. His present work includes preliminary investigations of hydro-electric development, topographic surveys, and drilling investigations. Jensen, Harold W., c'25, who is assistant general bridge inspector for the Chicago and Northwestern Railway Com- 28
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