So I have a few questions that I am unsure of. I am trying to calculate volumetric changes of an inlet in Florida. I've uploaded the text file, made a TIN, and used the 3D Analyst toolbar to calculate the volumes. We both sat down and shared the way we were computing the values. We are doing it the exact same way. When I compared this number to my adviser's number he got something completely different in ArcGIS 3.2. I am using ArcGIS 10.3. We are using the same exact processes and same toolbars. Would there be any major changes that I am unsure about between these two versions to give us totally different numbers?