The Hoffman drainage tunnel drained all of Georges Creek mines. The two mile long tunnel drains into the Braddock Run tributary of Georges Creek.
The Hoffman Drainage tunnel was an engineering triumph of its age. Built in the period 1903 through 1906, it was hand-driven through solid rock for 2 miles to provide an outlet for water that was flooding the coal mines. The water had proven to be too much for the steam pumps, and coal production was stagnating. After an engineering survey of the turrel project by the Consolidation Coal Company, a contract was let to Mr. Phillip Jenkins, Sr. of Wales. Work was begun from both ends in November 1903 by Jenkins’ four sones, William, Edward, James, and Phillip, Jr. [url]http://en.wikipedia.org/wiki/Hoffman_tunnel[/url] />The coords are not exact but for Clarysville.