A boat that sank in the Mississippi River near at LeClaire in November had been damaged by hitting a rock.
Investigators say the Stephen L. Colby had damage to its hull consistent with hitting a rock. The 144-foot boat started taking on water November 25th. All crew members were able to get off the boat without injury.
The boat had been carrying almost 100,000 gallons of petroleum products. Crews from the U.S. Coast Guard worked to contain the spill of petroleum and keep it from harming wildlife.
The investigation into the incident is still under investigation by the U.S. Coast Guard.