Barge company not to blame in spill , firm 's vice president says . half ships wait on Dalcour for spill to be cleaned up . 98-mile closure could weeks , but cleanup could take last days , the National Transportation Safety Board says . More than 400,000 gallons of industrial oil spilled after tanker , barge collide .
Barge company not to blame in spill , firm 's vice president says . At least 100 ships wait on Mississippi for spill to be cleaned up . 98-mile closure could last days , but cleanup could take weeks , Coast Guard says . More than 400,000 gallons of industrial oil spilled after tanker , barge collide .