A Geospatial Approach to Uncovering the Hidden Waste Footprint of Lake Superior’s Mesabi Iron Range

John Baeten, Nancy Langston, and Don Lafreniere recently published an article titled: “A Geospatial Approach to Uncovering the Hidden Waste Footprint of Lake Superior’s Mesabi Iron Range” published in The Extractive Industries and Society.

Article Abstract: “For decades, the Lake Superior Iron District produced a significant majority of the world’s iron used in steel production. Chief among these was the Mesabi Range of northern Minnesota, a vast deposit of hematite and magnetic taconite ores stretching for over 100 miles in length. Iron ore mining in the Mesabi Range involved three major phases: direct shipping ores (1893–1970s), washable ores (1907– 1980s), and taconite (1947–current). Each phase of iron mining used different technologies to extract and process ore. Producing all of this iron yielded a vast landscape of mine waste. This paper uses a historical GIS to illuminate the spatial extent of mining across the Lake Superior Iron District, to locate where low- grade ore processing took place, and to identify how and where waste was produced. Our analysis shows that the technological shift to low-grade ore mining placed new demands on the environment, primarily around processing plants. Direct shipping ore mines produced less mine waste than low-grade ore mines, and this waste was confined to the immediate vicinity of mines themselves. Low-grade ore processing, in contrast, created more dispersed waste landscapes as tailings mobilized from the mines themselves into waterbodies and human communities.”