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“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Near Hibbing in St. Louis County, Minnesota — The American Midwest (Upper Plains)
 

Hull-Rust Mahoning Mine Pit Overlook

 
 
Hull-Rust Mahoning Mine Pit Overlook Marker image. Click for full size.
By Keith L, September 28, 2007
1. Hull-Rust Mahoning Mine Pit Overlook Marker
Inscription. Immediately to the north and extending approximately 3½ miles east to west is the open pit known as the Hull-Rust Mahoning Mine, begun in 1895. In fact, over the past 100 years of mining here, more than thirty separate mining companies have operated within its perimeter, many at the same time. At one time this was known as "The Largest Open Pit Mine in the World". The mine, at its maximum depth, is 600 feet in the Scranton Pit, just below and to the west of this point.

At the beginning of this millennium nearly 2 billion tons of iron ore and waste were removed from this man made excavation. This volume is equivalent to digging a tunnel 24 feet in diameter completely through the earth. Average iron content of the ore shipped was over 60% iron with little, if any, processing of the ore required.

The largest year of production was 1942, during World War II, when more than 27 millions tons of ore were shipped during the normal nine month summer season. This required one train car of ore leaving the mine every 20 seconds for it's 90-mile journey to ore docks at the head of Lake Superior. In the 1940's more than 70 miles of rail line were used within the mine.

In 1976 Hibbing Taconite Company (Cliffs Inc.) began 'taconite' mining near the continental divide just north of the Hull-Rust Mahoning. Mining
Hull-Rust Mahoning Mine Pit Overlook Marker image. Click for full size.
By Keith L, September 28, 2007
2. Hull-Rust Mahoning Mine Pit Overlook Marker
of the higher grade, and hematite rich, 'natural ores' ended in 1984. Taconite mining requires a sophisticated plant to magnetically concentrate the lower grade (30-35% iron) primary ore, upgrading it to over 66% iron and producing a final product of 3/8" furnace fired pellets. Taconite pellets are now the final product that is rail shipped to the Duluth-Superior harbor and then transferred to the Great Lakes iron ore boats for shipment to the blast furnaces.

Rain water and ground seepage at one point caused the water level in the mine to reach a maximum of over 325 feet. Subsequent pumping has brought this water level down to allow for present mining of the deeper taconite ores, as you can see below you.

- In Partnernership with the Cleveland-Cliffs Foundation -

 
Location. 47° 26.854′ N, 92° 56.755′ W. Marker is near Hibbing, Minnesota, in St. Louis County. Marker can be reached from Greyhound Boulevard/3rd Avenue East, on the left when traveling north. Touch for map. Marker is beyond the mine visitor center/observation building; accessible only when the center is open. Marker is in this post office area: Hibbing MN 55746, United States of America.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Mining Haul Truck Engine Module (within shouting distance of this
Scranton Pit image. Click for full size.
By Keith L, September 28, 2007
3. Scranton Pit
(west of marker)
marker); P & H 2300 Production Shovel Bucket (within shouting distance of this marker); Underground Mining in the Hibbing Area (within shouting distance of this marker); 170 & 240 Ton Production Trucks (within shouting distance of this marker); Hill of Three Waters or the Triple Divide (within shouting distance of this marker); Hull-Rust-Mahoning Mine (within shouting distance of this marker); Marion 1150 Dragline Bucket (about 300 feet away, measured in a direct line); Haulpak Production Truck Tires (about 300 feet away). Touch for a list and map of all markers in Hibbing.
 
Also see . . .  Hull Rust Mahoning Mine View. (Submitted on March 30, 2008.)
 
Categories. 20th CenturyIndustry & Commerce
 
Scranton Pit image. Click for full size.
By Keith L, September 28, 2007
4. Scranton Pit
(below marker)
Hull-Rust Mahoning Mine image. Click for full size.
By Keith L, September 28, 2007
5. Hull-Rust Mahoning Mine
(east of marker)
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on March 30, 2008, by Keith L of Wisconsin Rapids, Wisconsin. This page has been viewed 3,052 times since then and 50 times this year. Photos:   1, 2, 3, 4, 5. submitted on March 30, 2008, by Keith L of Wisconsin Rapids, Wisconsin. • J. J. Prats was the editor who published this page.
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