There are 6 dams on the Missouri River from Montanta to Kansas City, MO. These dams were originally built for the purposes of flood control. The problem with these dams is that the upper dams are very poorly built and are already holding record water levels with record snow pack about ready to melt and overwhelm them. What is supposed to happen is that lake levels are supposed to be low in winter ready to receive spring runoff. If the Fork Peck Dam fails, the resulting wall of water would destroy all other 5 dams like a row of falling dominoes. If all 6 dams on the Missouri River fail, the resulting flood would destroy cities, and nuclear power plants all along the river including Kansas City and St. Louis. A dam failure and the resulting flood would be the worst disaster in US History.
The third trumpet in Revelations has to do with the curse of the rivers and wormwood contamination, or nuclear contamination. Could a dam failure and a flooding of nuclear power stations along the Missouri River constitute a fulfillment of John's 3rd Trumpet? I was thinking before that the Japan Tsunami and Fukushima nuclear disaster could have fulfilled John's 3rd Trumpet, but a catastrophic dam failure along the Missouri would also fit. (false 3rd Trumpet?)
D&C 121:33 As well might man stretch forth his puny arm to stop the Missouri river in its decreed course, or to turn it up stream, as to hinder the Almighty from pouring down knowledge from heaven upon the heads of the Latter-day Saints.
The Fort Peck Dam is an embankment/hydraulic fill dam and has already failed once during construction. Teton Dam, Kaloto Dam, South Fork Dam, Lower San Fernando Dam are just a few examples of earth-fill or hydraulic fill dam failures.