On 26th January, 2001, the Kachchh region of Gujarat, India faced devastating earthquake of magnitude 7.6 (Mw) popularly known as “Bhuj” earthquake. Various man made facilities including earthen dams faced varying level of damages during the earthquake and one of the major causes of failure is attributed to wide spread liquefaction of foundation soil. In the present study, a typical Chang dam sections located in the vicinity of epicenter is considered for the back analysis using dynamic numerical analysis with the help of commercially available software FLAC 5.0. The software has the capacity to model advanced non-linear constitutive material behavior under dynamic loading along with the pore pressure generation capabilities. The results of the back analysis of the dam section indicated that the presence of liquefiable soil beneath the foundation not only caused large deformation but also modified the failure pattern i.e. from slope to a base type failure, the feature which was also observed during field investigations. Dynamic numerical analysis is performed using the acceleration – time history record of the Bhuj earthquake developed by Iyengar and Raghukanth (2006) involving analytical procedures.