| Overview | |
|---|---|
| Other name(s) | Hoffman drainage tunnel |
| Location | Clarysville |
| Operation | |
| Work begun | 1903 |
| Opened | 1906 |
| Technical | |
| Design engineer | Phillip Jenkins |
| Length | 2 miles |
| Grade | 1/3 percent |
The Hoffman tunnel, or Hoffman drainage tunnel, was constructed to drain water from coal mines northwest of Clarysville in Allegany County, Maryland. The two-mile-long tunnel drains into the Braddock Run tributary of Wills Creek.