Cliffs Natural Resources has a long history of providing a safe workplace, striving to be good stewards of the environment, and establishing strong and respectful relationships with our communities. These fundamentals provide the foundation upon which we manage our business.

Our Core Values contribute to our ability to overcome business challenges. They guide us when we have to make difficult decisions in complex situations. They also help us to maintain the trust we have built with our stakeholders and with each other.



Cleveland Iron Company is founded by eleven men from Cleveland, OH who seek to develop the hard hematite and magnetite ores of the Negaunee outcropping in Michigan’s Upper Peninsula.

In the following years, the first railway is built on the Iron Range and the Sault Ste Marie Canal opens, built with support from Cleveland Iron Mining, whose first iron ore shipment is 120 tons. Cleveland Iron Mining pioneers use of the diamond drill, getting cleaner drill cores and gaining accuracy on siting locations for underground mines.


The Cleveland-Cliffs Iron Company is founded, with William G. Mather as its president.


Cleveland-Cliffs is recognized as the largest independent producer of iron ore in the United States.

It organizes the first geological department for an iron mining company in the Lake Superior Region of Ishpeming, Michigan, and is the first on the Michigan Iron Range to develop and train mine safety teams.


Cliffs opens a laboratory in Ishpeming to find ways to make low-grade ores usable, and pioneers a process to beneficiate the ore into high-quality, custom-made pellets. Cliffs’ first pellets are produced at the Eagle Mills Plant in Negaunee Township, Michigan.


Cliffs opens Empire Mine, the first to use two-stage, self-grinding (autogenous) mills in iron ore processing.


Cliffs opens Tilden Mine in Michigan, the first to process fine-grained hematite ore with a selective flotation system.


Cliffs embarks upon strategy to expand globally and to diversify into other minerals, leading to the acquisitions of iron-ore properties in Brazil, Canada and Australia and coal properties in Australia and the US.


New Chairman, CEO and President and newly formed Board of Directors installed after contested proxy battle.


A momentous year for Cliffs due to several crucial decisions aimed at strengthening the Company and its core U.S. iron ore business. Fully exits the North American Coal business. Initiates formal restructuring proceedings under the Companies’ Creditors Arrangement Act (Canada) (“CCAA”) for the Bloom Lake and Wabush mines. Completes the sale of the Chromite assets in Northern Ontario as part of the CCAA process. Finalizes the sale of the Decar Nickel project in British Columbia and the remaining portfolio of exploration projects.

200 Public Square, Suite 3300, Cleveland. OH 44114-2544 - Phone: 216-694-5700