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Brighton Storm Water Relief Scheme
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| Service: | NATM design of the shaft bottom, TBM chamber, mucking bunker and backshunt
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| Estimated cost: | Commencement: | June 27, 1993
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Completion date: | November 27, 1993
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| Location: | Brighton |
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| Technical data: | 11.6 m diameter shaft, approx. 45 m deep. Concrete segmental construction to 24.95 m OD. NATM construction to the base at -43.25 m OD with a 7.5 m span TBM launch chamber and mucking bunker, 40 m long, and 4.0 m diameter backshunt adit, 13.5 m long. |
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| Geology description: | Made Ground overlying Marine Gravels overlying upper Chalk. The NATM shaft and adits were excavated within the Upper Chalk which had numerous flint bands. Seawater was consistently flowing trough the joints and flint bands. |
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| Bid cost: | Final cost: | $500,000
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