Figure 1.2 

Existing flood control features of the American River watershed. SOURCE: Sacramento District, USACE, 1991.

Thus, for about 18 months in 1993-1995, a WSTB-formed committee was engaged in a study relevant to American River flooding and risk reduction. In 1995, the committee issued Flood Risk Management and the American River Basin: An Evaluation (NRC, 1995), a report that outlined an approach for improving the selection of a flood risk reduction strategy from the many available. The report contains a variety of recommendations covering improved operations of existing dams in the upstream basins, the integrity and hydraulic capacity of existing levees, statistical analysis of the historic flood record, better hydrologic monitoring in the basin, ecological analysis of alternatives, risk management analysis and water resources planning approaches, and research needs.

Current Planning Efforts And Controversies

In March 1996, the USACE and its non-federal affiliates completed the Congressionally directed reevaluations of flood control options and submitted recommendations to Congress. In response, Congress authorized a component of the recommended plan but not an adequate plan for the reduction of flood risk for the



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