Abstract: A barge, a barge assembly system, and assembly method are provided for assembling a barge that is constructed in component pieces sized to be capable of shipping by road or railway from a first location to a second location adjacent to a body of water for assembly of the barge. The barge assembly system includes a portable assembly device having a variety of frame elements that, when assembled, produce a structure capable of supporting barge section components that are placed thereupon so that the barge may be assembled. The barge assembly system can also include a crane for lifting the barge section components onto a support surface of the portable assembly device.