Based on the clue '580 sites were visited before colorado springs was...', what is the answer?

Based on the clue '57 of the 150 of these were meant to be accompanie...', what is the answer? What is associated with: 57 people died when this volcano in the cascade range erupted in 1980? What is associated with: 5760 grains in troy weight or 7000 grains in avoirdupois weight? What is referred to by '58 down dispatched 4'? What is associated with: 59 in 1921 with the new york yankees? What is associated with: 59 medals were awarded to men who fought in this 1900 asian uprising? What is associated with: 59425 total square miles today the biggest of the original 13? Based on the clue '5th 50th 500th are this type of number as opposed...', what is the answer?