Risks of river travel in the area 12 miles below mouth of Manley Slough 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 Espen Jervsjo talks with Knut Kielland about the importance of staying on the trail and the risks involved in river travel. Process Observed: Travel HazardTravel Route Date Process Observed: Wednesday, March 2, 2011 Galleries: 12 miles below mouth of Manley Slough Gallery