Facebook abandons broken drilling equipment under Oregon coast seafloor
oregonlive.com
oregonlive.com
There is no environmental damage and no danger to the residents.
The residents that didn't want to see a small construction project, the size of a residential lot, will now have to put up with it for another year.
To me though this sounds less like - gov wants fb to remove and more like gov wants fb to fill out appropriate paperwork
They are not boring a tunnel... So is there just a quite thin pipe in the ground? is it filled with the fluid? Or is there some storage for the fluid?
After the drilling is complete, cement grout is pumped into the annular space, replacing the mud. then the mud in the pipe will be replaced with sea water. Then they will pull the fiber optic cable through the pipe.
Drill pipe comes in various sizes, probably about 4-8 inch diameter for this job.
I have some pictures here of submarine cable landing stations in Hawaii, including the Hawaiki CLS under construction with some HDD being done. https://photos.app.goo.gl/H2Y7K112wcAoSjtN2