Guard Lock for Dam 3
Just upstream from the Dam No. 3 site, you’ll find the remains of the guard lock for the dam. Made of gray limestone, this inlet lock also acted as a lift lock because it was located at a lower level than the river. The towpath crosses over the lock, which has been partially filled in. You can find the brick shell of the old lockhouse nearby.
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Mile Marker: 62.4
Photo by: Bud and Dell Cline
Nearby Amenities:
- Harpers Ferry Campsite
Approximately 0.3 miles away. - Fort Duncan
Approximately 0.4 miles away. 
Huckleberry Hill Restroom
Approximately 0.5 miles away.- Huckleberry Hill Campsite
Approximately 0.5 miles away. 
Huckleberry Hill Campsite Hand Pump
Approximately 0.5 miles away.
