Is elevation a proper noun

No, the noun 'elevation' is a common noun; a general Word for a height above a given level; a general Word for the height to which something is raised; a general Word for an act of raising someone or something in level; a Word for any elevation of any kind.

A proper noun is the name or title of a specific person, place, or thing; for example, Elevation Hotel & Spa in Crested Butte, CO or Elevation Road in Benson, NC.