When using the Subsurface Utility Conflict Detection tool, the elevations on the conflict nodes can get mangled in certain circumstances. The sample feature definitions in the Bentley supplied libraries show the problem.
Feature Definition = New Conflict - this FD uses a single 3D cell for presentation of the found conflict
Feature Definition = Borepit Needed - this FD uses a top and bottom 3D cell.
The problem - when a feature definition comprised of a single 3D cell is used in combination with the selection of a surface in the Conflict Detection toolbox, the elevations assigned to the conflict node are incorrect and the node is drawn at the ground elevation instead of at the elevation of the found conflict.
The workaround - Always use a conflict node feature definition which has two cells assigned, such as the supplied Borepit Needed.