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The Dodd Ford Bridge is a bridge spanning the Blue Earth River about one mile southwest of Amboy, Minnesota in Blue Earth County, Minnesota. The bridge is a steel, pin-connected, nine-panel, overhead, Pratt-truss highway bridge. Constructed in 1901, it is among the state's earliest remaining examples of the overhead Pratt type. The bridge also is significant for its association with Lawrence Henry Johnson, a prominent Minnesota bridge builder of the late nineteenth and early twentieth century. This bridge is one of only two authenticated surviving examples of Johnson's work. == Construction == Although Amboy stood only about one-half mile east of the river, there was no nearby highway bridge. A road did enter Amboy from the west, but it crossed the river at a shallows known as ''Dodd Ford'', which apparently was often an obstacle to vehicular traffic. In the fall of 1900 the Blue Earth County Board of Commissioners decided to have a bridge built at that location. The official county surveyor N.F. Brooks prepared the preliminary design documents. The local contracting firm of Carlstrom Brothers built the two stone piers. At that time bridge building in Minnesota was dominated by six Minneapolis companies: Gilette Herzog Manufacturing Company (a subsidiary of the American Bridge Company), William S. Hewett and Company, Minneapolis Bridge and Iron Company, L. H. Johnson, M. A. Adams Bridge Company, and Hewett Bridge Company. Although the last two firms did not bid on this project, the others did and their proposals were within a few hundred dollars of each other, ranging from $2948 by L. H. Johnson to $3320 by the Minneapolis Bridge and Iron Company. The contract went to the lowest bidder, L. H. Johnson. As the contractor, Johnson undoubtedly turned to an established bridge fabrications shop, possibly the Wisconsin Bridge and Iron Company, with which he had been associated earlier. Completion was required by June 1, 1901, and he apparently delivered the bridge on schedule for he was paid in full on June 6. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dodd Ford Bridge」の詳細全文を読む スポンサード リンク
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