AutoLISP - move value from object data field to elevation field

I have received a file from our GIS department with contours lines. Unfortunately, the contour lines do not have any elevations attached to them. This information is stored in the object data field "CONTOURELE".

Would it be possible to create a routine that moves the value from the object data field to the elevation field. Hoping to quickly create surfaces and avoid any user error when transferring the contour elevation?

Thank you for any help or advice as I am new to any sort of LISP routine.

Assuming you are using Civil 3d 2013. This functionality is already built in. No lisp is needed.

Is the file a shp you need to extract the levels of the contours it done through the MAP interface Murph_map can help here I am sure.