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Successful Urban Rock Tunneling in Spite of Encountering Gasoline, Cleaning Solvents, and Methane Gas

by Raymond W. Henn, (M.ASCE),
David Rogstad,



Document Type: Proceeding Paper

Part of: Geo-Engineering for Underground Facilities

Subject Headings: Underground structures | Solvents | Rail transportation | Methane | Ventilation | Urban areas | Tunnels

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