In order to produce an accurate depth migration of a seismic line, one needs an accurate velocity model. This model should reflect the lithology and lithostatic load that the rocks have experienced through burial and deformation. If we understand the geometry of these rocks, and their behaviour upon deformation, we can produce a more accurate velocity model. Performing palinspastic restoration of a depth-migrated seismic line can be used to assess the geologic validity of the velocity models and can lead to improvements in these models, particularly in the fine-scale velocity structure of exploration targets. A seismic line from the Rocky Mountain Foothills in NE British Columbia was interpreted. This line is located on the eastern edge of the Foreland Fold and Thrust Belt in the Canadian Cordillera within the structural transition zone. This transition zone represents a change in structural style from fault-dominated structures in the south to fold-dominated structures in the north. Because concentric folds account for much of the displacement in this region, we are able to assume constant volume with no movement in and out of the plane when restoring our cross-sections (Dahlstrom, 1969; Hossack, 1979; Wilkerson and Dicken, 2001). Two methods were used for balancing, namely line length and area balancing. Balancing of the interpretation of the seismic section was performed with two different software programs: 2D Move version 3.1d (Midland Valley Exploration, 2001) and LithoTect version 1.08 (Geo-Logic Systems, 2002).