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One end of the Hull-Rust-Mahoning pit, largest open pit iron mine in the world, near Hibbing, Minnesota. The pit is two and a half miles long, three quarters of a  mile wide and about four hundred feet deep. Sourced from the Library of Congress.
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One end of the Hull-Rust-Mahoning pit, largest open pit iron mine in the world, near Hibbing, Minnesota. The pit is two and a half miles long, three quarters of a mile wide and about four hundred feet deep. Sourced from the Library of Congress.

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One end of the Hull-Rust-Mahoning pit, largest open pit iron mine in the world, near Hibbing, Minnesota. The pit is two and a half miles long, three quarters of a mile wide and about four hundred feet deep. Sourced from the Library of Congress.

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