Ski area machinery and equipment of every kind and description, except tramway towers, shall be exempt from taxation as real estate if it meets all of the following qualifications:
I. It is used or useful in the operation of a passenger tramway or in the production of man-made snow, including: cables, sheaves assemblies, carriers, pipe lines, compressors, pumps, electrical apparatus;
II. It is not permanently affixed to the real estate upon which it is located; and
III. It is capable of being removed from the real estate.