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Service: | NATM design and instrumentation
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Estimated cost: | Commencement: | June 29, 1983
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Completion date: | December 30, 1988
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Location: | Hannover , Lower Saxony Germany |
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Technical data: | Twin track railway tunnel, length 5.21 km (3.23 miles), full section of 140 m² approx. Excavation method: NATM, top heading, bench and invert. |
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Geology description: | Lower shell limestone, higher bunter sandstone: clay and sandstone layers, high groundwater inflows of 400 l/s at the interface between the limestone and sandstone encountered. |
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Bid cost: | Final cost: | $100,000,000
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