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Chambers Creek Tunnel Access Shafts
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| Service: | Consulting and site supervision for shotcrete lining installation
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| Estimated cost: | Commencement: | July 30, 2000
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Completion date: | December 30, 2001
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| Location: | Tacoma, WA United States |
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| Technical data: | 3 shafts, 12 ft (3.7 m) ID, 40 ft (12 m) to 130 ft (40 m) deep with a sprayed concrete (fcu 25 N/mm²) shell, 6 inches (150 mm) thick. Breakout into a combined sewer line at the bottom of the shaft. |
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| Geology description: | Sand / Gravel Clay, galical deposits. Water table at 110 ft (33.5 m) below ground level. |
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| Bid cost: | Final cost: | $1,500,000
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