Great Lakes iron ore shipping remains below seasonal norms despite modest year-over-year growth, keeping domestic pellet demand and Mesabi Metallics’ startup under close scrutiny.
By Sonny Rollins
Great Lakes iron ore shipments reached 5.1 million tons in August, up 2% from 2025 but still 5.1% below the month’s five-year average, according to the Lake Carriers’ Association. Through August, the trade totaled 27.5 million tons, an increase of roughly 3% year over year, but remained 5.2% below the comparable five-year average.
That combination, growth against a weak prior year but a continuing gap to normal seasonal volumes, offers a measured reading of the U.S. steel raw-material market. Mills are operating, but the Great Lakes data do not yet show a full return to the shipping and consumption pattern seen across the stronger years of the recent five-year period.
The result is a demanding test for Mesabi Metallics, whose Nashwauk project is moving from construction toward commissioning as North American steelmakers assess future demand for domestic direct-reduction-grade pellets.
Great Lakes flows show recovery, not a full rebound
The shipping season began slowly. Great Lakes iron ore shipments totaled about 2 million tons in January, near the previous year but 14.5% below the five-year average. By the end of March, cumulative shipments stood at 2.7 million tons, down 7.7% from 2025 and more than 21% below the five-year average for the first quarter.
Spring and summer loadings improved as vessels returned to regular service and steel mills rebuilt raw-material inventories. April shipments reached approximately 3.9 million tons, while June shipments rose to 5.1 million tons, almost matching the month’s five-year average. July was also near 5.1 million tons, although the total remained 7.2% below the seasonal benchmark.
The August result therefore continues a pattern of steady but incomplete normalization.
| Period | Great Lakes iron ore shipments | Year-over-year change | Comparison with five-year average | Read-through |
|---|---|---|---|---|
| January | 2.0 million tons | Near 2025 | -14.5% | Slow seasonal start |
| Through March | 2.7 million tons cumulative | -7.7% | -21.2% | Weak first quarter |
| April | 3.9 million tons | +5.3% | Four-month cumulative gap remained -13.5% | Spring recovery |
| June | 5.1 million tons | +4.5% | Near average for the month | Normalization |
| July | 5.1 million tons | Less than +1% | -7.2% | Summer flow below trend |
| August | 5.1 million tons | +2.0% | -5.1% | Stable but not strong |
| January–August | 27.5 million tons cumulative | +3.0% | -5.2% | Recovery from weak 2025 base |
Sources: Lake Carriers’ Association August report; June cargo report; July cargo report and port tables. Figures are rounded where the LCA release reports rounded totals.
Port-level data from July illustrate the unevenness beneath the headline total. Duluth handled 885,915 tons, below both its 2025 volume and five-year average. Two Harbors remained the largest listed Minnesota loading point at 1.63 million tons, while Marquette reached 943,152 tons, above its five-year average. Cleveland’s total of 457,073 tons was also above its seasonal average.
This matters because Great Lakes volume is not only a mining indicator. It is also a measure of inventory positioning, vessel utilization and the timing of steel mill procurement. A weak start cannot always be recovered later: the navigation season closes before winter, and lost loading days can compress the window for mines, carriers and mills alike.
Mesabi-scale production will depend on both mine readiness and reliable access to the Great Lakes logistics system.
Steel utilization is firmer than ore shipments
U.S. steel production data present a somewhat stronger picture than the shipping numbers. The American Iron and Steel Institute reported domestic raw steel production of 1.9 million net tons in the week ending Sept. 12, with capability utilization at 82.3%. Great Lakes district output was estimated at 538,000 net tons that week.
Year-to-date adjusted production through that week reached 66.54 million net tons, up 5.5% from the comparable period, while utilization averaged 79.1%, compared with 77.2% a year earlier.
| Indicator | Latest reported level | Market implication |
|---|---|---|
| U.S. capability utilization | 82.3% | Strong weekly operating rate |
| U.S. year-to-date utilization | 79.1% | Better than the prior year |
| U.S. weekly raw steel production | 1.90 million net tons | Highest point in the recent weekly sequence |
| Great Lakes district output | 538,000 net tons | Regional mill demand remains material |
| August U.S. limestone shipments | 3.0 million tons | +1.7% year over year, -1.5% versus five-year average |
| January–August U.S. limestone shipments | 13.1 million tons | -1.9% year over year, -3.6% versus five-year average |
Limestone provides a useful adjacent signal. August U.S. Great Lakes limestone shipments increased from the prior year but remained below the seasonal average. The data are not fully comparable with earlier periods because Canadian quarry shipments stopped being reported during 2026. Even with that limitation, the limestone flows suggest that construction, flux and aggregate demand remain active but not broadly overheated.
The divergence between steel utilization and iron ore shipments may reflect inventory timing, imports, pellet consumption patterns and product mix. It also cautions against treating one month of higher steel output as evidence of a sustained domestic pellet surge.
Mesabi Metallics approaches the operating test
The Nashwauk project is designed to produce approximately 7 million metric tons of direct-reduction-grade pellets annually. Mesabi Metallics says it has invested more than $2.1 billion and expects the operation to become Minnesota’s first new mine and pellet plant in nearly 50 years.
The project reached a key operating milestone in July when Mesabi Metallics completed its first production blast. The company said the 66-hole blast fractured approximately 211,000 tons of ore and opened an initial ramp into the pit, allowing 400-ton haul trucks to begin moving material.
Third-party project updates have placed overall completion between roughly 95.5% and 99%, with commissioning of the first processing line targeted for the second half of the year. The company’s own pellet plant overview continues to describe the operation as more than 75% complete, reflecting a less frequently updated construction summary.
The commercial question is more important than the headline completion percentage. Mesabi must demonstrate consistent feed preparation, pellet quality, plant availability, rail access and customer acceptance. A first blast proves mine access; it does not yet establish a stable pellet production rate.
For North American steelmakers, the project’s potential value lies in its product specification. Direct-reduction-grade pellets can support DRI-EAF production, where higher iron content and lower impurities can reduce energy and processing requirements. That market is smaller and more specialized than the traditional blast-furnace pellet market, but it may command stronger contract economics if mills are willing to pay for quality and domestic supply security.
Direct-reduction-grade pellets serve a different market from conventional blast-furnace feed and are priced through quality, contract and logistics considerations.
Domestic pellets face a different price test from seaborne ore
The seaborne benchmark provides context, but it is not a direct proxy for U.S. domestic pellet contracts. Market commentary and price trackers placed the 62% Fe fines benchmark at roughly $94–98 per ton CFR China in August, with an estimated monthly average near $96.3 per dry metric ton and a late-month marker around $95.84.
Higher-grade Simandou material traded at a substantial premium. Available market commentary placed 65% Fe Simandou ore near $115–117 per ton in late August, implying a premium of approximately $19–21 per ton to the 62% benchmark.
| Market reference | August indication | What it measures |
|---|---|---|
| 62% Fe fines, CFR China | About $94–98/t | Seaborne benchmark |
| 62% Fe estimated monthly average | About $96.3/t | Broader monthly price level |
| 62% Fe late-August marker | About $95.84/t | End-of-month reference |
| Simandou 65% Fe material | About $115–117/t | Higher-grade seaborne ore |
| Simandou premium | About $19–21/t | Indicative grade differential |
| Mesabi DR-grade pellets | Contract-based; no public August benchmark identified | Domestic premium pellet market |
The Simandou project is expected to add high-grade supply gradually rather than all at once. Rio Tinto guidance cited in market reports points to 5–10 million tons of sales in the initial year, while some analyst scenarios anticipate 15–20 million tons of shipments during the ramp. The project’s long-term design capacity is much larger, but rail, port and transshipment infrastructure will determine how quickly it reaches the market.
For Mesabi, Simandou creates both a challenge and a reference point. Additional high-grade seaborne supply could weaken benchmark prices over time. At the same time, domestic DR-grade pellets are not simply interchangeable with Chinese-bound fines. Their value depends on delivery reliability, steel mill configuration, emissions targets, inland freight and the price of alternative imported pellets or concentrate.
Scenario framework for operators and investors
| Scenario | Steel demand and utilization | Pellet contract pricing | Shipping-window and weather risk | Likely outcome |
|---|---|---|---|---|
| Base case | U.S. utilization remains near 78–81%; demand improves gradually | Domestic DR-grade pellets retain a quality and logistics premium, but contracts remain disciplined | Normal autumn weather allows most planned movements before freeze-up | Mesabi reaches initial production and ramps progressively; Great Lakes shipments finish near, but below, the five-year average |
| Bull case | Utilization holds above 82% and flat-rolled, infrastructure or automotive demand strengthens | Higher-quality domestic pellets command firmer premiums as mills seek reliable DRI feed | Mild late-season weather extends loading and replenishment activity | Stronger mill pull supports faster Mesabi commissioning and tighter regional pellet balances |
| Bear case | Utilization falls toward the mid-70s as steel orders weaken or inventories rise | Seaborne benchmark weakness pressures negotiations; domestic premiums narrow | Early ice, storms or vessel delays reduce the effective shipping season | Great Lakes shipments undershoot seasonal norms, customers defer pellet purchases and Mesabi’s ramp becomes more dependent on execution rather than market pull |
The central signal from August is therefore not scarcity. It is resilience with limits. Great Lakes iron ore volumes are higher than last year, U.S. steel utilization is improved and Mesabi Metallics has moved into a physical startup phase. Yet shipments remain below historical seasonal levels, limestone flows are modest and seaborne markets face additional high-grade supply from Guinea.
The next test will be whether domestic steel demand can sustain mill utilization through the winter planning cycle and whether Mesabi can convert its first blast and nearly completed infrastructure into repeatable commercial pellet output. For operators, the important variables are plant availability, rail and vessel scheduling, and customer qualification. For investors, the more useful indicators are shipment momentum, contract premiums and the pace at which Simandou supply changes the global grade curve, not any single headline production figure.
