Use the Elevations From Surface command to assign the elevations of a surface to the geometry points of one or more feature lines, parcel lines, survey figures, or 3D polylines.
Elevations are assigned to each vertex. You can include intermediate elevation points at any break points along the surface. Elevations obtained from the surface are not dynamic.
Click Modify tabEdit Elevations panelElevations From SurfaceFind.
Select the Insert Intermediate Grade Break Points check box to insert intermediate grade breaks where the entity crosses surface TIN lines. Elevation points are created at these locations.
Click OK.
Do one of the following:
Select the feature line or other object.
Enter Multiple, and then select multiple objects.
Enter Partial, and then define a portion of the feature line to assign elevations to.
The feature line is assigned the elevations of the underlying surface.