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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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Histories
Remembering Days Past 1879-1979
Written by a City employee, and published by the City.
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Black Powder
Giant Powder
Giant's black powder line starts operation at Point Conchal
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Explosions or Fires
Giant Powder
Explosion wrecks Giant Powder's Clippergap mills; plant closed
Machinery moved to Giant Powder's plant on San Pablo Bay; stored until commissioned for new black powder line in 1924.
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