On September 23, 2019, the tugboats G.M. McAllister and Nancy McAllister were assisting the bulk carrier Ijssel Confidence on the Southern Branch of the Elizabeth River, in Chesapeake, Virginia. While engaged in turning the bulk carrier, the G.M. McAllister contacted the NGL Energy Partners wharf. There were four crewmembers on board the tugboat. The vessel was not damaged and therefore continued the turning maneuver. No pollution or injuries were reported. Damage to the wharf was estimated at $1.47 million.

The​​​ probable cause of the contact of the G.M McAllister with the NGL Energy Partners berth was the docking pilot backing down the river toward the turning basin at a speed at which the assist tugboats could not be effectively used. Contributing to the accident was insufficient communication, before and during the maneuver, between the docking pilot and the G.M. McAllister​ captain.