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Uploaded by SFPUCcommunications on Dec 21, 2011
Large tunnel boring machines are used to excavate new sewers in San Francisco's Visitacion Valley.
Science & Technology
Standard YouTube License
What's with the guy in the reading glasses and the buck tee shirt? Did he loose his safety gear?
mofoaj 2 months ago
at 3:10 is monumental. i love this stuff
1skunkus 2 months ago
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What's with the guy in the reading glasses and the buck tee shirt? Did he loose his safety gear?
mofoaj 2 months ago
at 3:10 is monumental. i love this stuff
1skunkus 2 months ago