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HEBGEN INTAKE STOPLOG FAILURE - LESSONS LEARNED

机译：HEBGEN进入停止日志失败-经验教训

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About 17 feet of the Hebgen Dam Intake Tower stoplogs failed on August 31, 2008. The flow through the intake did not go out of bank downstream, nor did it cause any loss-of-life, but the more than 3,000 cfs flow continued for three weeks until September 21, 2009. The Emergency Action Plan was activated and some downstream campsites and residents were evacuated.rnThe high hazard potential Hebgen Dam is an 88-foot-high, 721-foot-long earth-fill dam with a spillway at the right end of the dam. A 70-foot-high, reinforced concrete intake structure is located approximately 200 feet upstream of the dam's left abutment. The intake is not an integral part of the dam, but is itself a water retaining structure.rnHigh flows through the pipeline could have led to a dam failure. The actual failure mode was not evaluated as a Potential Failure Mode (PFM) during the 2005 Potential Failure Mode Analysis (PFMA) because it was judged not to lead to an uncontrolled release of water that would threaten life. Although the intake stoplog failure did not lead to any loss-of-life, in addition to the risk to the dam from erosion of the wood-stave pipeline and subsequent erosion of the dam, this failure had large political, public relations, and financial costs to the company and a cost to the industry in general about reliability of water retaining structures. This paper discusses the lessons learned from the failure, including the causes, the method used to secure the intake, problems in the dam failure warning system, and work underway at the intake.
机译：2008年8月31日，约有17英尺的赫布根水坝进水塔停工失败。流经进水口的水没有从下游流出，也没有造成任何生命损失，但在3,000 cfs的流量下继续直到2009年9月21日为止的三个星期。紧急行动计划已启动，一些下游营地和居民被疏散了。高潜在危险赫本大坝是88英尺高，721英尺长的土石坝，溢洪道位于大坝的右端。大坝左桥台上游约200英尺处，有一个70英尺高的钢筋混凝土进水结构。进水口不是大坝的组成部分，而是本身的保水结构。流经管道的高流量可能导致大坝故障。在2005年潜在故障模式分析（PFMA）中，未将实际故障模式评估为潜在故障模式（PFM），因为它被认为不会导致不加控制的水排放，从而威胁生命。尽管进气停止故障并没有导致任何生命损失，除了木条管道侵蚀和随后的大坝侵蚀给大坝带来风险之外，这种失败还涉及大量的政治，公共关系和财务保水结构的可靠性给公司带来的成本以及整个行业的成本。本文讨论了从故障中汲取的经验教训，包括其原因，用于固定进水口的方法，大坝故障警告系统中的问题以及进水口正在进行的工作。

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