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| Service: | NATM design, construction supervision and instrumentation
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| Estimated cost: | Commencement: | January 29, 1988
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Completion date: | December 29, 1990
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| Location: | Birmingham |
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| Technical data: | Large diameter shaft constructed using NATM for the diversion of a Water Supply Tunnel. |
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| Geology description: | Sandstone, Shale / Marl, Limestone Geology Type: Hard Rock |
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| Bid cost: | Final cost: | $25,000,000
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