Landmark

T.J. O'Brien Lock and Dam

Check tickets & tours

Some booking links are affiliate links. If you book through them, we may earn a small commission at no extra cost to you. We never let this influence which places we recommend.

T.J. O'Brien Lock and Dam is a navigational lock on the Calumet River in Phoenix, Illinois. From a small public park adjacent to the lock, visitors can watch vessels being raised or lowered between the river and the Calumet Sag Channel. The site offers a unique glimpse into inland waterway commerce, with interpretive signs explaining the lock's operation. It's a quiet, off-the-beaten-path spot for those interested in industrial infrastructure or just seeking a different kind of river view.

Don't miss

  • Observe the lock in action as boats pass through
  • Read interpretive signs about the Calumet River navigation system
  • Picnic at the small park overlooking the lock

Tickets & tours

Ways to visit T.J. O'Brien Lock and Dam

You can usually visit on your own. A tour is worth it for transport, a guide, or combining nearby sights into one day.

More attractions in Phoenix

Planning your trip to Phoenix? See where to eat, more attractions, or build a Phoenix itinerary.