I have tried using the Interpolate shape tool and it is not giving me the Z-values. It just creates a new polygon that has a reduced geometry (that is cut to the limits of the TIN.

Just to be clear, the Z-values are not stored as attributes, and the input feature class must be set up to have Z-Values. (When you create a new feature class in ArcCatalog, you have the option to check whether the geometry properties include M and/or Z values. If your's does not have Z values you can make a new feature class that has Z values, import the fields from the original, and use the Append tool to copy the data from the original feature class to the new feature class.)

Where the breaks occur is based on the TIN geometry or the raster cell size, which why I indicated trying both methods. Each has a use, and it depends on how you ultimately need to use this data as to which is better.

When I use Interpolate Shape Tool the new feature that is created (tin2_InterpolateShape5) does not contain any new attribute information than did the original feature (Sample Grid_V3). I want the averaged elevation values from the TIN to be included in the new feature (tin2_InterpolateShape5).

Ah, so I would convert TIN to Raster, then the Raster to Points tool, then use the Identity tool to assign the FID of your polygons to the points. Then use the Dissolve tool to dissolve the points by polygon FIDs, using the field statistics to average the elevation values, and finally join the dissolved points via the polygon FID to the original polygons and if you want export the joined output and clean up the extra fields.

Thanks Charlie! Exactly what I was looking for. BTW this service is awesome, keep it up!

I want to convert a raster to tin but when i do so it comewp as a vertical bar,I think my peramiers are not right any advise woulsd be greatly appreciated