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The ore crusher at the southwestern portion of the Hibernia Mine complex is pictured here in 1910.
The adit reached a total length of more than a mile. The Hibernia Underground Railroad was incorporated exclusively for this purpose. After 1907, Joseph Wharton connected a branch of his Wharton & Northern Railroad to the mine and both the Hibernia Mine Railroad and Hibernia Underground Railroad fell into disuse.

The mine was abandoned in 1916 after yielding a total production of more than 5 million tons. In the 1950's, a new shaft was sunk in the northeast area of the mine but no actual mining took place. After 1972 and again in 1989, the shafts had all been blasted shut, bulldozed and/or capped and the open pit workings filled in. The adit too was partially blasted during an unsuccessful closure attempt in 1989 leaving dangerously fractured rock and rubble near the entrance. External ruins remain in the form of foundations.
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