The 110 meter long self-propelled tanker barge Piz Cambrena went aground on the Main River after a navigation mistake.  The master of the Piz Cambrena had steered towards the shore to allow another vessel to pass by when it struck bottom.  No reports of injuries, damage or pollution released.  The Piz Cambrena was refloated later the same day after the water level was raised by closing a nearby lock.   The Piz Cambrena continued on its voyage from Raunheim Aus to Birsfelden with its cargo of diesel fuel.