Lots of things to comment on here, so I will do my best to keep this organized:
AK Steel - Dearborn Works at the head of the Rouge navigation channel is the former Severstal/Rouge Steel/Ford Rouge steelmaking operation. It very much is a primary steelmaking facility, with ore brought in by Interlake Steamship vessels. Coke is now brought over from Zug Island. The "C" Furnace at the Rouge was largely expanded and rebuilt under Severstal and boosted AK Steel's production capacity. AK has various finishing operations on-site. This Zug Island announcement is all so ironic, because I heard that AK's merger with Cleveland Cliffs could bode well for the Dearborn/Rouge Works in the long-term....
USS Great Lakes Works, Like AK-Dearborn, is fully integrated and includes primary/steel production and secondary/finishing capacity. The furnaces located on Zug Island produce pig iron, which is railed to the BOF in Ecorse, with finishing facilities located in Ecorse and River Rouge. Ore is unloaded on the face of Zug Island and sometimes in the old riverbed on the NE end of the island. Mill scale is also loaded there. Coal is unloaded in the Short Cut Canal. Other commodities are sometimes loaded/unloaded further up the old riverbed. The Swing Bridge near Jefferson Avenue is apparently stuck in the closed position and thus vessels bigger than a canoe cannot fully traverse the old riverbed rouge any longer.
The closure announcement will effect primary steelmaking operations and some secondary functions of Great Lakes Works. Thus, ore traffic will stop, but coal will continue as the coke ovens will stay open. Other docks along the Rouge will remain open. This announcements suggests to me that 1) primary production facilities at Zug are expensive to run and/or 2) there is more demand for precise finished product that Great Lakes Works produces, or it makes financial sense for this product to be produced nearby the end users (probably auto plants and suppliers). Slabs will now need to come by rail from Gary or another USS facility to Ecorse for finishing.
The best I can tell from USACE data is that USS Steel's Great Lakes Works received about 3 million tons of iron ore in 2018. AK Steel received about 4.1 million tons.
Wow, I figured production was higher at Zug, since they had two furnaces running for much of 2018, I think. I guess C Furnace at AK Steel is bigger than I thought. Keepin' those Interlake classics busy!!
When I am near AK Steel, in Dearborn, I see ads for tours of the Ford factory. This may be a long shot. But does anybody know if USS runs tours of the Zug Is steel mill?
Those are tours run by Ford in partnership with Henry Ford Museum and only show the carmaking (F150-making) side of the plant, They probably discuss steelmaking history briefly but you don't go near the steelmaking side of the plant on the tours. USS has had a long history of high security of their sites. I don't think "tour" is in their vocabulary. I did a Boy Scout wildlife project on Zug Island back when it was still owned by National Steel. We were installing birdboxes and other habitat features on the grassy hills along the old Rouge riverbed. I wish I had paid more attention to my surroundings then!
Arcelor Mittal periodically does tours of the Burns Harbor Plant in Indiana, but these are for employees and a limited number of guests only. My brother works there. Watching a glowing hot slab roll out of the furnace and get shaped into a plate on a giant mill stand is a multisensory experience of wonder. They did tours one day in 2019 to celebrate the 50th anniversary of the "Coke to Coated" full steelmaking operations. I think the previous time they did tours was in 2014. There is someone high up in plant management who thinks this kind of outreach is important. It really makes a difference who is at the top.
This might be the end of steelmaking on Zug...or, maybe not. Zug was idled in the middle of the 2000's and when National was bankrupt, the future looked bleak. There was a moment when both Zug and Rouge were almost gone. New companies came in, reinvestment happened, jobs preserved, boats and trains busy. USS hasn't said they are closing Zug, they are idling it. Demand may increase and it may be partially or fully reopened. We will have to see what happens.
Here's a link to a couple of more detailed articles, for reference:
https://www.crainsdetroit.com/manufactu ... t-lay-1545
http://www.thenewsherald.com/news/u-s-s ... 091c4.html
And, just for fun, here's a video of one of the Zug Island ore bridge "clamshell" buckets moving taconite from the dock on the conveyor taking it toward one of the furnaces:
https://www.youtube.com/watch?v=Xjq7Aw-Ds6Y