RedactedNarrative: Incident occurred at 2:15 am with the five occupants in LA 4167 EX heading north in the Mississippi River near head of passes. Vessel occupants were returning from an offshore fishing trip. The vessel struck the dredge pipe owned by Great Lakes dredging company located in the Mississippi River. Eye witnesses say that the pipe was not lit at the time of the incident. Because of the U.S. Coast Guards lack of notifying LDWF enforcement agents we were not able to go to the scene of the accident. We were notified at 12:25 p.m., 10 hours after the original incident occurred. Because of this lack of notification agents spent the majority of the day tracking down the operator and passengers of the vessel and securing the vessel for seizure and inspection for our investigation. The vessel will be inspected by reconstrutionists and the motors will be downloaded upon approval. In addition to the vessel being seized the GPS from the boat was also taken out for safe keeping. Report to follow.LDWF was not able to confirm whether the pipe was lit or unlit due to conflicting stories of both parties. Injuries of victims was due to the impact of striking the pipe.