From AIS. Commercial vessels do not queue — they take the next opening, so one arriving while you wait goes in front of you.

Every lockage the Corps has published over the last seven days, one day at a time — pick the day with the buttons below. Each block starts when the vessel arrived and is as tall as the minutes it took to clear, so the gaps between them are your windows. Recreational rows are grouped chamber loads, not individual boats — the feed never counts hulls. Where boats in a load carried AIS, the block says how many were seen (≥N) — a floor, since most have none. A commercial block is one vessel, and vessels occasionally share a lockage (4 of 1,164), so two blocks at the same minute can be a single passage. The thin hatched bands are the Salmon Bay railroad bridge, just west of the locks, down for a scheduled passenger train — 43 ft closed, so a masted boat waits; drawn from the timetable, not seen, and freight is not in it.