This report discusses the July 7, 2010, collision of the tugboat/barge combination Caribbean Sea/The Resource with the amphibious passenger vehicle DUKW 34 on the Delaware River in Philadelphia, Pennsylvania. As a result of the accident, two passengers on board DUKW 34 were fatally injured, and several other passengers sustained minor injuries. Damage to DUKW 34 totaled $130,470. Damage to the barge was minimal; no repairs were made.