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: Urban areas | Rocks | Tunneling | Gasoline | Solvents | Methane

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