The record
Passage log
What passed, where, and when. 28,207 recorded transits across 7 chokepoints, filed by month. Pick a cell to read that month's log in chronological order.
Blank cells are months with no recorded traffic at that chokepoint, usually the winter closure, when the locks shut and the lakes trade stops. They are left blank rather than pretended away.
Every month, every chokepoint
| Month | Soo Locks | Duluth Ship Canal | Superior Entry | Straits of Mackinac | Port Huron / Blue Water Bridge | Detroit River / Ambassador Bridge | Welland Canal |
|---|---|---|---|---|---|---|---|
| December 2025 | 254 | 42 | 31 | 148 | 285 | 278 | 174 |
| November 2025 | 236 | 49 | 31 | 159 | 301 | 329 | 200 |
| October 2025 | 276 | 66 | 46 | 212 | 272 | 354 | 190 |
| September 2025 | 289 | 70 | 36 | 214 | 279 | 345 | 169 |
| August 2025 | 304 | 82 | 54 | 227 | 314 | 368 | 170 |
| July 2025 | 334 | 90 | 42 | 221 | 397 | 412 | 253 |
| June 2025 | 307 | 92 | 55 | 204 | 380 | 379 | 224 |
| May 2025 | 322 | 100 | 56 | 210 | 400 | 409 | 201 |
| April 2025 | 259 | 62 | 33 | 128 | 280 | 283 | 185 |
| March 2025 | 54 | 13 | 6 | 20 | 66 | 82 | 41 |
| February 2025 | — | — | — | 4 | 18 | 29 | — |
| January 2025 | 104 | 21 | 13 | 46 | 117 | 122 | 33 |
| December 2024 | 284 | 57 | 45 | 143 | 281 | 294 | 198 |
| November 2024 | 242 | 57 | 53 | 153 | 308 | 314 | 160 |
| October 2024 | 259 | 67 | 49 | 183 | 307 | 327 | 188 |
| September 2024 | 292 | 73 | 70 | 194 | 346 | 355 | 207 |
| August 2024 | 275 | 74 | 66 | 190 | 338 | 342 | 178 |
| July 2024 | 300 | 92 | 74 | 183 | 393 | 392 | 184 |
| June 2024 | 295 | 83 | 70 | 183 | 381 | 391 | 200 |
| May 2024 | 317 | 82 | 39 | 185 | 409 | 397 | 213 |
| April 2024 | 271 | 64 | 36 | 128 | 331 | 325 | 185 |
| March 2024 | 68 | 17 | 8 | 33 | 103 | 119 | 35 |
| February 2024 | — | — | — | 26 | 32 | 35 | — |
| January 2024 | 125 | 30 | 28 | 102 | 136 | 153 | 24 |