Pilotac, an experimental taconite concentrating plant built by the Oliver Mining Division of United States Steel. The plant went into operation at Mountain Iron in 1953 as Minnesota Ore Operation’s Minntac plant.

Inside the Trout Lake Concentrator, Oliver’s large ore beneficiation plant located in the Canisteo District of the Mesabi Iron Range (Coleraine, Minnesota), ca. 1940.

Mining at the Spruce Mine in Eveleth, ca. 1940. The Spruce Mine was one of many Oliver-controlled mines throughout the Mesabi Iron Range.

Oliver Mining Company employee gardens, 1923. Oliver Mining Company allowed employees to plant and harvest from gardens within their communities. This garden was located in Fayal Location, near Eveleth.

Oliver-built homes in Taconite, 1920. Similar to those built in Marble, Oliver built homes in nearby Taconite to accommodate for the growing Canisteo District population and workforce.

Oliver-built homes in Marble, Minnesota, 1920. The company designed and built homes in in the Canisteo District for employees to live in as they populated towns throughout the western Mesabi Range.

Missabe Mountain Mine, Virginia, ca. 1920. The mine was the first to be purchased by Henry Oliver and it formed the backbone on which Oliver Mining Company was built. In 2019, the it is part of the Rouchleau pit complex.

Oliver Mining Company steam-powered shovel near Hibbing, 1919. In this method of mining, a shovel removes overburden, the rock and soil that covers the ore body, so that miners can access the ore from the open pit.

An Oliver Mining Company locomotive hauls ore away from an open pit near Hibbing, Minnesota, 1917. The young city is visible in the background.

Home of the General Superintendent of the Oliver Mining Company in Hibbing, ca. 1913.