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The Refugio Valley
Rocks, Soils, Hills and Valleys
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The Hercules Powder Works
Explosives and the Second Industrial Revolution
Commerce in Explosive Products
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California Powder Works
Hercules Works
...1 more
CPW moves black powder mills to Hercules
Event
California Powder Works
Explosives Industry
CPW Established in Santa Cruz
CPW established at Santa Cruz
Event
California Powder Works
Giant
...1 more
CPW and Gunpowder Trade Association agree to a CPW monopoly on West Coast. Duration was until Giant erected mills at Clippergate in 1889.
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