The mining industry was at its best it the late 1800s. Then they had steam powered shovels to dig dirt like iron ore. Henry Oliver drove this industry in the late 1800s and early 1900s. They also shipped iron on Lake Superior. They used very large ships.
What the industry is like today. Now we have safer ways to mine. It is driving Minnesota’s economy. And now we have safer, faster, and easier to mine. Plus now we have better equipment