Muddy area at end of airport runway No flash player has been set up. Please select a player to play Flash videos. Video not playing? Update your browser or download the video clip Soft and warm muddy area near where the slough at the end of the airport runway enters the main Tanana River. Process Observed: Open WaterGroundwater UpwellingMud Date Process Observed: Saturday, December 17, 2005 Galleries: End of Airport Runway Gallery