Recorded chokepoint passages for Calumet, newest first. The record, not the map: this feed carries passages already in the archive, which ends at December 2025. Vessel data derived from the Nationwide Automatic Identification System (NOAA Office for Coastal Management, marinecadastre.gov), CC0.https://freighterlog.com/vessels/calumet/en-usVessel data derived from the Nationwide Automatic Identification System (NOAA Office for Coastal Management, marinecadastre.gov), CC0. Transit and lock data from the St. Lawrence Seaway Management Corporation / Saint Lawrence Seaway Development Corporation public vessel-transit table (seaway-greatlakes.com).Wed, 23 Sep 2026 18:23:30 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:367340990:2025-12-31T07:17:21ZCalumet crossed Detroit River / Ambassador Bridge downbound on 31 Dec 2025 02:17 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 31 Dec 2025 07:17:21 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:367340990:2025-12-31T01:42:46ZCalumet crossed Port Huron / Blue Water Bridge downbound on 30 Dec 2025 20:42 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 31 Dec 2025 01:42:46 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367340990:2025-12-27T11:28:46ZCalumet crossed Straits of Mackinac eastbound on 27 Dec 2025 06:28 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 27 Dec 2025 11:28:46 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367340990:2025-12-21T08:51:15ZCalumet crossed Straits of Mackinac westbound on 21 Dec 2025 03:51 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 21 Dec 2025 08:51:15 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:367340990:2025-12-19T18:02:02ZCalumet crossed Port Huron / Blue Water Bridge upbound on 19 Dec 2025 13:02 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 19 Dec 2025 18:02:02 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:367340990:2025-12-19T11:15:27ZCalumet crossed Detroit River / Ambassador Bridge upbound on 19 Dec 2025 06:15 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 19 Dec 2025 11:15:27 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:367340990:2025-12-15T17:03:49ZCalumet crossed Detroit River / Ambassador Bridge downbound on 15 Dec 2025 12:03 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 15 Dec 2025 17:03:49 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:367340990:2025-12-15T11:15:37ZCalumet crossed Port Huron / Blue Water Bridge downbound on 15 Dec 2025 06:15 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 15 Dec 2025 11:15:37 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367340990:2025-12-14T04:02:53ZCalumet crossed Straits of Mackinac eastbound on 13 Dec 2025 23:02 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 14 Dec 2025 04:02:53 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367340990:2025-12-09T18:49:46ZCalumet crossed Straits of Mackinac westbound on 9 Dec 2025 13:49 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 09 Dec 2025 18:49:46 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367340990:2025-12-08T13:55:57ZCalumet crossed Straits of Mackinac eastbound on 8 Dec 2025 08:55 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 08 Dec 2025 13:55:57 GMThttps://freighterlog.com/log/mackinac/2025-12/freighterlog:passage:367340990:2025-12-02T10:11:02ZCalumet crossed Straits of Mackinac westbound on 2 Dec 2025 05:11 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 02 Dec 2025 10:11:02 GMThttps://freighterlog.com/log/port-huron/2025-12/freighterlog:passage:367340990:2025-12-01T13:54:51ZCalumet crossed Port Huron / Blue Water Bridge upbound on 1 Dec 2025 08:54 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 01 Dec 2025 13:54:51 GMThttps://freighterlog.com/log/detroit-river/2025-12/freighterlog:passage:367340990:2025-12-01T07:27:13ZCalumet crossed Detroit River / Ambassador Bridge upbound on 1 Dec 2025 02:27 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 01 Dec 2025 07:27:13 GMThttps://freighterlog.com/log/detroit-river/2025-11/freighterlog:passage:367340990:2025-11-21T04:34:42ZCalumet crossed Detroit River / Ambassador Bridge downbound on 20 Nov 2025 23:34 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 21 Nov 2025 04:34:42 GMThttps://freighterlog.com/log/port-huron/2025-11/freighterlog:passage:367340990:2025-11-20T22:48:01ZCalumet crossed Port Huron / Blue Water Bridge downbound on 20 Nov 2025 17:48 EST. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 20 Nov 2025 22:48:01 GMThttps://freighterlog.com/log/mackinac/2025-11/freighterlog:passage:367340990:2025-11-01T09:30:22ZCalumet crossed Straits of Mackinac westbound on 1 Nov 2025 05:30 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 01 Nov 2025 09:30:22 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:367340990:2025-10-30T22:30:51ZCalumet crossed Port Huron / Blue Water Bridge upbound on 30 Oct 2025 18:30 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 30 Oct 2025 22:30:51 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:367340990:2025-10-30T15:57:16ZCalumet crossed Detroit River / Ambassador Bridge upbound on 30 Oct 2025 11:57 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 30 Oct 2025 15:57:16 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:367340990:2025-10-27T10:14:53ZCalumet crossed Detroit River / Ambassador Bridge downbound on 27 Oct 2025 06:14 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 27 Oct 2025 10:14:53 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:367340990:2025-10-26T08:31:17ZCalumet crossed Straits of Mackinac eastbound on 26 Oct 2025 04:31 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 26 Oct 2025 08:31:17 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:367340990:2025-10-19T16:57:48ZCalumet crossed Straits of Mackinac westbound on 19 Oct 2025 12:57 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 19 Oct 2025 16:57:48 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:367340990:2025-10-17T23:10:41ZCalumet crossed Port Huron / Blue Water Bridge upbound on 17 Oct 2025 19:10 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 17 Oct 2025 23:10:41 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:367340990:2025-10-15T16:23:52ZCalumet crossed Detroit River / Ambassador Bridge downbound on 15 Oct 2025 12:23 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 15 Oct 2025 16:23:52 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:367340990:2025-10-15T11:01:43ZCalumet crossed Port Huron / Blue Water Bridge downbound on 15 Oct 2025 07:01 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 15 Oct 2025 11:01:43 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:367340990:2025-10-12T21:29:59ZCalumet crossed Port Huron / Blue Water Bridge upbound on 12 Oct 2025 17:29 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 12 Oct 2025 21:29:59 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:367340990:2025-10-12T14:59:36ZCalumet crossed Detroit River / Ambassador Bridge upbound on 12 Oct 2025 10:59 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 12 Oct 2025 14:59:36 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:367340990:2025-10-11T22:18:11ZCalumet crossed Detroit River / Ambassador Bridge downbound on 11 Oct 2025 18:18 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 11 Oct 2025 22:18:11 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:367340990:2025-10-11T16:54:36ZCalumet crossed Port Huron / Blue Water Bridge downbound on 11 Oct 2025 12:54 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 11 Oct 2025 16:54:36 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:367340990:2025-10-10T12:09:04ZCalumet crossed Straits of Mackinac eastbound on 10 Oct 2025 08:09 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Fri, 10 Oct 2025 12:09:04 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:367340990:2025-10-08T13:24:23ZCalumet crossed Straits of Mackinac westbound on 8 Oct 2025 09:24 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 08 Oct 2025 13:24:23 GMThttps://freighterlog.com/log/port-huron/2025-10/freighterlog:passage:367340990:2025-10-07T05:17:21ZCalumet crossed Port Huron / Blue Water Bridge upbound on 7 Oct 2025 01:17 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 07 Oct 2025 05:17:21 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:367340990:2025-10-06T23:35:45ZCalumet crossed Detroit River / Ambassador Bridge upbound on 6 Oct 2025 19:35 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 06 Oct 2025 23:35:45 GMThttps://freighterlog.com/log/detroit-river/2025-10/freighterlog:passage:367340990:2025-10-05T03:36:36ZCalumet crossed Detroit River / Ambassador Bridge downbound on 4 Oct 2025 23:36 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 05 Oct 2025 03:36:36 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:367340990:2025-10-04T01:20:59ZCalumet crossed Straits of Mackinac eastbound on 3 Oct 2025 21:20 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sat, 04 Oct 2025 01:20:59 GMThttps://freighterlog.com/log/mackinac/2025-10/freighterlog:passage:367340990:2025-10-01T14:36:31ZCalumet crossed Straits of Mackinac westbound on 1 Oct 2025 10:36 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Wed, 01 Oct 2025 14:36:31 GMThttps://freighterlog.com/log/mackinac/2025-09/freighterlog:passage:367340990:2025-09-30T19:34:13ZCalumet crossed Straits of Mackinac eastbound on 30 Sep 2025 15:34 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Tue, 30 Sep 2025 19:34:13 GMThttps://freighterlog.com/log/mackinac/2025-09/freighterlog:passage:367340990:2025-09-28T01:16:53ZCalumet crossed Straits of Mackinac westbound on 27 Sep 2025 21:16 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Sun, 28 Sep 2025 01:16:53 GMThttps://freighterlog.com/log/detroit-river/2025-09/freighterlog:passage:367340990:2025-09-25T01:07:05ZCalumet crossed Detroit River / Ambassador Bridge upbound on 24 Sep 2025 21:07 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Thu, 25 Sep 2025 01:07:05 GMThttps://freighterlog.com/log/detroit-river/2025-09/freighterlog:passage:367340990:2025-09-22T01:32:36ZCalumet crossed Detroit River / Ambassador Bridge downbound on 21 Sep 2025 21:32 EDT. Interpolated from AIS track samples and good to about ±15 minutes; a crossing of the FreighterLog chokepoint line, not an official lock record.Mon, 22 Sep 2025 01:32:36 GMT