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Yacambu-Quibor-Tunnel
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| Service: | Advice and Recommendations for Experimental Investigation Section.
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| Estimated cost: | Commencement: | November 30, 1990
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Completion date: | December 31, 1991
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| Location: | Venezuela
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| Technical data: | 24.4 km long transfer tunnel, 4.2 m diameter. |
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| Geology description: | Phyllite, Sandstone. |
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Description
L= 24.368 m Water diversion tunnel TBM drive was stopped due to high rock pressure. One TBM got stuck and was lost.