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  • Coverage > 1940s (remove)
  • Subject > Pacific Coast Aggregates (remove)
  • Subject > Mines and Mining-Sand and Gravel (remove)
  • Subject > Pleasant Valley Excavation (remove)

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  • by only a few hundred yards, and resembles the latter workings in so many respects (products, capacity, methods, plant, number of men employed, and others) that only some of the major differences will be listed here and the reader is referred for details