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Chambers Creek Tunnel Access Shafts

Consulting and site supervision for shotcrete lining installation
Estimated cost: Commencement:
July 30, 2000
Completion date:
December 30, 2001
Tacoma, WA
United States
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.

Geology description:

Sand / Gravel Clay, galical deposits. Water table at 110 ft (33.5 m) below ground level.

Geology types:
Bid cost: Final cost:
Service areas:
Surface around Shaft Head
Shaft at Surface
View from Base of Shaft