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See what it’s like to dig a tunnel 100 feet below a city
- Terr_ 3y agoOver here in Seattle, this reminds me--even down to the scrolling javascript stuff--of other features about the "Bertha" digging machine for the I-99 tunnel project, which replaced an earthquake-risk viaduct. Comparing stats, both project are a similar distance, but the highway involved removing about 23 times more material as it went. (57.5-foot diameter hole vs 12.)