The USEPA Lake Guardian was logged downbound through the Keweenaw corridor at 2:54 this morning, her AIS showing a Soo Locks ETA of 4:01 a.m. on Sunday, August 30. Do the arithmetic: that is roughly 49 hours from last report to lock arrival. A loaded laker runs the same corridor in a fraction of that time. The Guardian is not running freight. She carries researchers and sampling equipment, and her pace through water that the commercial fleet covers at full throttle marks her as clearly as a different flag would.
On the opposite side of that traffic picture, three upbound freighters were stacking at DeTour in the predawn hours, each with a Friday Soo arrival penciled in. Algoma Intrepid led the queue, last reported at 3:03 a.m. with a 6:30 lock ETA. Wilfred M. Cohen was behind her at 9:53. W I Scott Purvis brought up the rear at 11:20. Three hulls, three arrival windows, all upbound before noon.
Algoma Equinox was running the Keweenaw downbound with a 14:00 lock arrival today, last reported at 2:06 a.m. Kaye E. Barker was showing a Soo Locks position at 4:06 this morning with a 4:16 ETA, nearly at the gate as the early watch began.
American Spirit was downbound from Harbor Beach at 4:48 a.m., due at Port Huron by 9:14 and tracking through to Detroit with a 13:31 ETA at the Dossin Museum waypoint. That is one vessel confirmed at two points on the full St. Clair corridor in the same Friday morning window.
Baie Comeau and CSL St-Laurent were running upbound together off South East Shoal before 5:00 this morning, their Detroit River ETAs only seven minutes apart, 9:58 and 9:51. Two hulls, nearly the same clock, the same heading.
H. Lee White loaded coal at CSX Toledo and departed for the twin ports. Mark W. Barker left Cleveland loaded with salt for Muskegon. Those are two vessels with confirmed cargoes and confirmed destinations, both cleared before this edition went to press.
At the Welland Canal, Evans Spirit cleared inbound at Port Weller just after 5:00 this morning while Federal Oshima had gone outbound two hours earlier at 2:41. The canal was handling traffic in both directions before dawn.
Lake Erie sits at 2.97 feet above Low Water Datum at Cleveland, the highest reading across the system right now, and Lake Huron reads 2.26 feet at Harbor Beach. Superior is lowest at 1.65 feet. The spread between Superior and Erie means vessels loading at the head of the lakes are working with tighter draft margins than those loading on Erie, a fact that shows up in cargo tonnage even when it never makes a headline.
High pressure at 30.20 inches is drifting over the central Great Lakes through early Saturday, holding Huron to two-foot waves and Superior and Michigan to one foot. The calm window closes Sunday night into Monday when a warm front is forecast to push showers and storms across Huron. Anyone planning a weekend passage has today and Saturday as the clear days; Monday is the one to watch.
The Jones Act debate has returned to the Great Lakes conversation, with federal waivers suspending the century-old domestic shipping law creating what maritime leaders at the Great Lakes Maritime Academy in Traverse City are calling an uncertain operating environment. The law requires cargo between U.S. ports to move on American-built, American-owned, American-crewed vessels. Whether the waivers narrow or widen is a question with direct consequences for every hull working this system, and the academy is watching the answer closely.