30Th Anniversary of the Lawn Lake Dam Failure: a Look Back at the State and Federal Response July 27, 2012 Mark E
30th Anniversary of the Lawn Lake Dam Failure: A Look Back at the State and Federal Response July 27, 2012 Mark E. Baker, P.E. National Park Service, Denver, CO Bill McCormick, P.E., P.G., Colorado Division of Water Resources, Salida, CO ABSTRACT On July 15, 1982, deep in Rocky Mountain National Park, the 26-foot high Lawn Lake Dam failed. The resulting flood charged down a mountain carving deep ravines and depositing huge fields of rock. It also wiped out campsites, tragically killing 3 people. The flood inundated businesses in the town of Estes Park and caused $31 million in damages. This paper describes how the State of Colorado (State) and Federal agencies responded to the event. The many impacts of this dam failure are explored so that the dam safety community can be better prepared to handle the myriad of issues associated with dam failures efficiently. The paper reviews the State’s response including communications immediately following the failure and the details of conducting a dam failure investigation, including the forensic analysis to determine likely failure mechanisms. Changes to the State dam safety program as a result of the failure are described. The effects of the failure on the NPS dam safety program, including the decision to remove other dams within Rocky Mountain National Park are also explored. The role of FEMA in coordinating post- failure research studies conducted by Federal agencies, including the USGS, USBR, and the NPS are also discussed. Finally, the paper describes the types of legal investigations conducted and lawsuits filed following the failure.
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