Browse TRAIL Inventories

Methods and costs of sinking a circular concrete-lined ventilation shaft

Methods and costs of shaft sinking in the Coeur d'Alene District, Shoshone County, Idaho

Sinking methods and costs for a small vertical shaft with steel supports :Keystone mine, Crested Butte, Colorado

Safety practices in shaft sinking and tunneling :West Delaware aqueduct

Methods and costs of shaft sinking, U.S. Atomic Energy Commission Project Gnome, near Carlsbad, New Mexico

Mining method, technique, and cost of presplitting the flood control gate shaft, Littleville Dam, Huntington, Mass.


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