CADAM3D performs the stability analysis of gravity dams, spillways, weirs and water intakes using the gravity method in accordance with the Canadian state-of-practice as documented in CDA (2007, 2013) and USACE (1995) . The stability analysis is performed in the upstream-downstream direction for unreinforced gravity structures. Although geometric details are given in 3D in CADAM3D, the loads are essentially in the upstream-downstream direction. Stability calculations in the cross-stream direction are not considered in this CADAM3D version (particularly critical for seismically loaded piers about their weak bending axis).