United States Gypsum Co. MinePast Producer • Gypsum-Anhydrite
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Marblehead Stone QuarryPast Producer • Limestone, General
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Rocky Ridge QuarryPast Producer • Limestone, General
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White Rock QuarryPast Producer • Calcium
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American Mine Number 2 QuarryPast Producer • Gypsum-Anhydrite
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Genoa QuarryPast Producer • Calcium
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White Rock Quarry L.P.Producer • Calcium
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Clay Center PlantProducer • Stone
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U.S. Gypsum MillPast Producer • Gypsum-Anhydrite
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American Mine No 2Producer • Gypsum-Anhydrite
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Geawe QuarryPast Producer • Stone, Crushed/Broken
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Lower MinePast Producer • Gypsum-Anhydrite
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Brush Wellman/ Elmore, OhioPast Producer • Beryllium
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Marblehead QuarryPlant • Stone, Crushed/Broken
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Rocky Ridge PlantProducer • Stone, Crushed/Broken
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Ottawa County Hwy Dept.Producer • Stone, Crushed/Broken
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U.S. Gypsum Company Genoa QuarryProducer • Stone, Crushed/Broken
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