The tugboat J.R. Nichols has sunk in the Houston Shipping Channel. The 56-foot tugboat had a crew of five aboard at the time of the sinking. Four of the five crewmen survived the sinking, but the fifth crewman died in the accident. Salvage efforts have raised the J.R. Nichols, and an investigation is underway into the cause of the sinking. The tugboat is reportedly owned by Kinder Morgan.