question: For the station opened after 1876 at 604.53km from Wellington, what is the height above sea level?
answer: SELECT height_above_sea_level__m_ FROM table_name_22 WHERE opened > 1876 AND distance_from_wellington = "604.53km"
context: CREATE TABLE table_name_22 (height_above_sea_level__m_ VARCHAR, opened VARCHAR, distance_from_wellington VARCHAR)