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The story of mining iron for the iron furnaces at Oswego (i.e., Lake Oswego), Oregon provides one more piece of the tapestry that makes up the fascinating history of Oswego’s iron industry. Over a period of 27 years the smelting operation in the small-town of Oswego 10-miles south of Portland produced 93,404 tons of pig iron. The first furnace was built in 1866; went into operation in 1867 and smelted iron ore intermittently until 1885. A portion of the furnace still stands at George Rogers Park. A year later a new furnace was built a short distance north and operated from 1888 until 1894. Nothing visible remains of this furnace except the furnace’s crucible.

After nearly 19 years with the Oregon Department of Geology and Mineral Industries (DOGAMI) and a 38-year career as a geologist, Clark Niewendorp retired in 2018 and started working at DOGAMI as a cartographer and from there sported a few other hats from industrial minerals geologist to geothermal evaluator to field geologist. In 2000, He brought his family across the Oregon Trail from South Carolina and settled in Tualatin. While in South Carolina, he worked for the South Carolina Geological Survey as a geologist primarily mapping the rocks in the Pediment of the state. His previous experience also includes working as a mine geologist, petroleum geologist, and environmental geologist. He has a BS in geology from Southeast Missouri State University and MS in geology from Western Michigan University.