Take a trip into a wetland to hear about an unusual drilling rig in the latest episode of The Dirt Podcast. Tim Bailey and his team used the swamp buggy, an amphibious drilling vehicle, to stage a geotechnical drilling investigation in the Scriber Creek Wetland, north of Seattle. It’s part of Sound Transit’s Lynnwood Link Extension project, which will extend a light rail line into Seattle’s northern suburbs. Listen to the podcast on SoundCloud, and download the app for easy access on-the-go.