It was announced on 10 June from Washington that the National Transportation Safety Board (NTSB) determined that Miss Susan, a shallow draft towing vessel with two barges, and Summer Wind, a deep draft bulk carrier, collided on 22 March 2014, because the towing vessel crossed the Houston Ship Channel, impeding the passage of the bulk carrier that was transiting inbound, which could only transit within the channel.

This collision resulted in the release of 168,000 gallons of fuel into the Houston Ship Channel from the breach of the forward barge and the hospitalization of two crewmembers in Miss Susan for inhalation-related injuries. As a result, the NTSB recommended that crews in vessels transporting hazardous materials receive appropriate training, personal protective gear, and access to irectreading
air monitoring equipment.