Resolution No. 4814 - Laserfiche WebLink

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extreme consequences of potential failure of one or more of these dams, we recommend that detai~ed seismic evaluations be conducted for al~ of these dams. A~l of these dams are owned and operated by the U.S. Army Corps of Engineers. Therefore, pragmatically, the role of the Eugene/Springfield community wou~d be pdmad~y to strongly encourage the Corps of Engineers to complete these urgently required seismic evaluations as soon as possible. 2. A key step in mitigation planning for dam safety is emergency planning. Emergency planners in the Eugene/Springfield Metro Area should obtain copies of the inundation maps for each of the major dams to familiarize themselves with the areas of potentia~ flooding. For emergency planning, the estimated flood depths and the time periods from dam failure are particularly important. Flood depths and flood times both vary markedly with distance downstream from the dam locations. For emergency p~anning, key elements include community emergency notification procedures and evacuation planning (routes and traffic control). Because of the 'very large numbers of potentia~ evacuees, training seminars and scenario exercises are strongly recommended. 3. All of these dams have Emergency Action Plans. These plans should be reviewed to ensure that they are complete and up to date. Emergency planning officials in each county should be fully informed of the detailed consequences of the potential failure of each dam. Public notification and evacuation plans should be updated and tested. For some types of dam failures, for example, those due to extreme floods, there may be some warning time. Decision making procedures, protocols~ and procedures for issuing watches, warnings, and evacuation notices should be reviewed and updated and coordinated among all responsible federal, state, and local agencies. The table on the following page contains dam safety mitigation action items from the master Action Items table in Chapter 4. References 1. FEMA, Federal Guidelines for Dam Safety: Hazard Potential Classification Systems for Dams, FEMA 333, October 1998. 2. FEMA, Multihazard Identification and Risk Assessment, A Cornerstone of the National Mitigation Strategy, Chapter 20, Dam Failures, 1997. 3. FEMA, Dam Safety: An Owner's Guidance Manual, FEMA 145, August 1987. 4. National Research Council, Safety of Existing Dams, Evaluation and Improvement, National Academy Press, 1983. 5. FEMA website (www.fema.gov), National Dam Safety Program webpage. 6. Oregon Emergency Management Division, Dam/Levee Failure, Statewide Hazard Analysis, March, 1987. 7. Hills Creek Lake Project, Emergency Response Flowcha~, Distributed January 2000, United States Army Corps of Engineers, Portland District, 5 pages. Public Review Draft: August 6, 2004 12-10