Complex sentence: The altitude of a triangulation station "Bandai" installed in 1904 had been employed as the official altitude of Mount Bandai, but the station disappeared due to erosion, because of this it was re-measured in October 2010 and now is 1,816.29m.
Split into simpler sentences: The altitude of the triangulation station "Bandai", installed in 1904, had been employed as the official altitude of Mount Bandai. However, after the station disappeared due to erosion, it was re-measured in October of 2010 and now is 1,816.29m.