Three representative dam-break models, HEC-1, DAMBRK, and SMPDBK were analyzed respectively in their theories and then applied to the failure of Teton Dam for which some observed data exist. From the results of this study, it can be concluded that:(1)HEC-1, which uses the hydrologic routing method, produces stable solutions for almost all the cases that were tested in this study :(2)DAMBRK, which uses the dynamic routing method, is most accurate among the three models ;(3)SMPDBK, which uses the generalized dyanmic routing relationships, is most economical and easily applicable.