Lock Status
Delays, queues and stoppages at every Corps of Engineers navigation lock, before you reach the approach.
Lock Status shows what's happening at the 190 locks the U.S. Army Corps of Engineers runs on America's rivers and waterways, using the Corps' own live data. It's made for towboat captains and crews on the inland rivers, and for boaters cruising the Great Loop.
What you can do with it
- See each lock's average delay, the vessels waiting and in the chamber, and any stoppage, colored by how busy it is.
- Plan a trip lock by lock, or the whole Great Loop, and see the next lock, how far it is and when you'll arrive.
- Get alerts when a stoppage starts or clears, a delay passes your limit, or a navigation notice is posted.
- Keep a lock on your Lock Screen and in the Dynamic Island, and your favorites in widgets and the Mac menu bar.
- Find each lock's VHF channel and phone number, and what to say when you hail it.
What the colors mean
- Little or no delay: under 15 minutes on average over the last 4 hours.
- Moderate delays: 15 to 59 minutes.
- Heavy delays of an hour or more, or traffic stopped.
Lock Status is available in English, Spanish, French, Russian, Chinese, Vietnamese, Filipino and Haitian Creole, for iPhone, iPad and Mac.
Help and feedback
Questions, suggestions, or a lock whose details look wrong? Email lockstatus@andrewthom.com. Include the lock's name if it's about a particular lock.
If a lock's data is missing or looks out of date, the Corps of Engineers may not have reported it yet: most locks update every 15 minutes.