Johnson PitProducer • Sand and Gravel, Construction
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Dow-LudingtonProducer • Magnesite
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Dow Chemicals--Ludington, Mich.Producer • Magnesite
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Ludington PitProducer • Sand and Gravel, Construction
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West Branch Clay PitPast Producer • Fire Clay (Refractory)
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Harbison-WalkerPlant • Magnesite
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Ludington MillPast Producer • Sand and Gravel, Construction
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Ludington PitProducer • Sand and Gravel, Construction
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Keise* Clay PitPast Producer • Fire Clay (Refractory)
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Dow Chemical - LudingtonProducer • Halite
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Ludington SitePast Producer • Silica
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