| Project Name: |
Alki Transfer Project |
| Location: |
Seattle, WA |
| Owner: |
King County Department of Metropolitan Services |
| Engineer: |
HDR Engineering Inc. |
| Tunnel Dimensions: |
10,200' x 133" |
| Excavation Method: |
Lovat Earth Pressure Balance TBM 157" |
| Tunnel Final Support: |
Single pass 9" thick precast concrete segments |
| Geology: |
Mixed face sand, slit, clay, gravelly sand |
| Shafts: |
170'L x 120' W x 35'D using concrete piles, Soldier Pile and Wood |
| Dates: |
February 1995 - February 1997 |
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