Boom!

mats

Next to the Montreal General Hospital they are building an addition to the hospital. Or maybe it is just a parking garage, I don’t know. Since this is literally in the mountain they have to remove a lot of rock. When I passed they were just finishing up drilling deep holes in the rock with a giant drill, mounted on a crawling vehicle.

Then the covered the just drilled hole with these big grey mats. Suddenly it dawned to me and my suspicion was confirmed when I saw this sign.

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