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Herbert Hoover Dike Consensus Report: External Peer Review of DSAC-1 Projects.
| 题名： | Herbert Hoover Dike Consensus Report: External Peer Review of DSAC-1 Projects. |
| 关键词： | risk reduction, seepage, lake levels, environmental impact, levees, peer review, risk assessment |
| 摘要： | The DSAC (Dam Safety Action Classification) External Peer Review Panel has found that the U.S. Army Corps of Engineers Class I designation (Urgent and Compelling) for Herbert Hoover Dike (HHD) under EC 1110-2-6064 INTERIM RISK REDUCTION MEASURES FOR DAM SAFETY dated May 31, 2007 is appropriate. It is likely that a failure mode involving piping from seepage has initiated at certain locations. The rate at which piping is occurring is dependent on lake level: it is clear that the seepage volume and distress indicators in certain reaches of the structure at reservoir levels above about Elevation 17 feet are cause for concern to the degree that failure is considered very likely when operating at or above these levels for any significant time. The higher the lake level, the shorter the time required for failure to occur. In this context failure means an uncontrolled release of water resulting from a catastrophic breach of some portion of the HHD system. HHD is a unique structure within the USACE portfolio, and is managed under the USACEs dam safety criteria (even though it is referred to as a system of dikes and/or levees) due to its permanent pool and its potential to cause catastrophic life safety, economic and environmental consequences should a breach occur. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0821；80p |
| 报告类型： | 科技报告 |
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