美国米尔顿湖土坝高15.2m,建于1913～1917年。1969年联邦政府检查团发现靠近西坝肩位置的坝体上游面出现下沉,同时还发现翼墙后填土产生沉陷。在将库水位泄降了4.6m的同时,组织力量对大坝的安全性进行了全面调查。调查结果表明,在正常库水位高程情况下,溢洪道只能勉强保持其稳定,当洪水位超过溢流堰顶1m时,它的稳定性接近临界状态,这时溢洪道上游坝踵部位在满 The United States Milton Lake dam high 15.2m, built in 1913 ~ 1917 years. In 1969, the federal government inspection team found that the upstream face of the dam near the west abutment shoulder had subsidence. At the same time, it also found that subsidence occurred behind the wing wall. While draining the reservoir water level by 4.6m, organizational forces conducted a full investigation of the dam’s safety. The survey results show that the spillway can only barely maintain its stability under normal water level elevation. When the flood level exceeds 1m above the top of the weir, the stability of the spillway reaches a critical state. At this moment, the dam heel upstream of the spillway is full