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Ibid., pp. The highest average daily traffic (ADT) count in the entire planning area, and one of the highest in the State of Iowa, is 77,000 ADT (2000) on the I-74 bridge over the Mississippi River. During low water, no continuous channel existed. 58, 39th Cong., 2d sess., p. 46; Kane, St. Anthony, pp. The Lafayette is the longest, at . 65-66; Roald Tweet, A History of Navigation Improvements on the Rock Island Rapids, (Rock Island District, U.S. Army Corps of Engineers, April 1980):2; John O. Jensen, Gently Down the Stream: An Inquiry into the History of Transportation on the Northern Mississippi River and the Potential for Submerged Cultural Resources, Wisconsin Archeologist 73:1-2 (March-June, 1992):71, says that only about 20 boats were operating above Galena before 1847. It was the first bridge built. As a result, Warren favored dredging. Or a series of deeper pools separated by shallow sandbars could be scattered across the main channel. U.S. 82 & 278 formerly used the Humphreys Bridge (old Greenville Bridge); they have both moved to the new Greenville Bridge when completed (2011). 311-12; Kane adds that during these years Meeker had sought to get the required completion date extended. It parallels the Mississippi River and winds it way through both sides of the flood wall that protects the city of St. Louis. Overall, Warren found that those who had been using the river evince a shrewd knowledge of the action of running water and the means of temporarily controlling it, gained by their constant experience and observation.33 Warren listened to these knowledgeable sources, but came to his own conclusions. As with the drive for railroad legislation, the push for waterway improvement was not just a farmers' movement. In February 1859, these directors reported, Key local projects included Locks and Dams 1 (Ford Dam) and 2 (Hastings), Lower and Upper St. Anthony Falls Locks and Dams, and the little known Meeker Island Lock and Dam, which was the rivers first and shortest-lived lock and dam (Figure 2). The Lou--which owed its existence to the Mississippi River--was being hindered by that . 2 new Mississippi River crossings in MN planned, studies underway Mississippi River Crossings - Trains Magazine - Trains News Wire Warren asked private companies and local interests what work they had done to improve the river's navigability. Bridging the Mississippi | National Archives Reeling from Chicago's increasing dominance over the region's trade, they saw the river as their best counteroffensive. Railroad expansion following the Civil War accelerated the pace of the Midwest's unprecedented population and agricultural growth. The lock and dam project hopelessly mired, the Corps, during its 1890 survey, evaluated removing boulders and rocks to encourage navigation.88 Major Alexander Mackenzie, the Rock Island District commander who had taken over this part of the river with the change in funding in 1888, suspected that Congress might authorize the Corps to remove the boulders in lieu of building locks and dams, even though it had authorized $25,000 to plan for a lock and dam in 1873.