Browse TRAIL Inventories

Development of sand and gravel deposits

Sand and gravel excavation.

Sand and gravel excavation.

Sand and gravel excavation.

Sand and gravel excavation.

Sand and gravel excavation.

Mining and milling methods and costs at the glass-sand plant of P.J. Weisel, Inc., Corona, Calif.

Sand and gravel operations and costs, Minneapolis-St. Paul area, Minn.

Sealing openings in abandoned mines by pneumatic stowing


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