00:00The massive cutter suction dredge bites deep into solid underwater rock right now.
00:05How do engineers carve massive concrete highway tubes directly through miles of hard harbor bedrock?
00:12Instead of risky explosives, workers used a massive underwater trenching sled with a diamond wire saw to cut the bedrock.
00:20Marine excavators and specialized cutter suction dredges sliced through the harbor's bedrock to carve the tunnel trench.
00:28Powerful suction pipes vacuumed away the crushed debris,
00:31clearing the path where the massive cutter suction dredge bites deep into solid underwater rock right now.
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