 and then they set their machine up and they bore it. They're boring in a straight level line. Yep. So if you were to take a tunnel and you were to drop it to the depth you would need to get into enough bedrock where you have a strong enough ceiling over the tunnel that isn't fractured, that doesn't leak, that supports the weight of the water, you would have to go back probably a mile in each direction of the bridge and start your cut.