The 110 meter long self-propelled tanker-barge RP Rheinfelden went aground on the Rhine River near Geisenheim, Germany.  The Rheinfelden was proceeding in dense fog when another vessel appeared.  The tanker-barge veered to avoid collision, but went aground.  The RP Rheinfelden was later released with the aid of a tug with minor damage.   No reports of injuries or pollution being released.  The Rheinfelden proceeded to Birsfelden, Switzerland with its cargo of 800 tons of gasoline.