nomic, and engineering studies were taking longer to complete and review than originally anticipated.

The Corps divided research and planning duties within the study into five groups: economics, engineering, environmental/historic properties, project management/plan formulation, and public involvement. In addition to holding public meetings about the navigation study, the Corps worked with other stakeholders and experts from other federal and state agencies. These groups included a Governors' Liaison Committee —which consisted of governor-appointed representatives from the five Upper Mississippi River basin states (Illinois, Iowa, Minnesota, Missouri, and Wisconsin) and the commander of the Corps' Mississippi Valley Division—and the Navigation Environmental Coordination Committee (NECC), which consisted of representatives from the five basin state-level natural resources and conservation agencies.

The Corps issued a draft feasibility study report in July 2000 (USACE, 2000a) and was scheduled to release its final report in the second half of 2001. This National Research Council study and report thus reviews and assesses the Corps' draft feasibility study. As of late 2000, the cost of the draft navigation feasibility study was $55.6 million, with the largest percentage (43 percent) of this cost being associated with the environmental analysis ( Figure 1.2 ).

FIGURE 1.2 Feasibility Study Cost Estimate ($ in millions and percent of total).



In early 2000, the DOD requested the National Academies to review the Corps' Upper Mississippi River–Illinois Waterway navigation system feasibility study. Given the publicity surrounding this study, it was requested that the study be completed relatively quickly. A joint committee of the National Academies' Transportation Research Board (TRB) and Water Science and Technology Board (WSTB) was convened to carry out the study. The charge to the committee is as follows:

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