Abstract: Methods, systems, and apparatus for a fill port for a flexible container such as a flexible self supporting dewatering structure. An apparatus in accordance with an embodiment of the invention can be a fill port for a flexible container such as a flexible self supporting dewatering structure, wherein the flexible container can include a flexible material and an opening. The fill port can include an inner port body capable of mounting to one side of the flexible material and adjacent to the opening, wherein inner port body is capable of receiving a fill material through the opening. The fill port can also include an outer port body capable of mounting to an opposing side of the flexible material adjacent to the opening, wherein outer port body is capable of receiving the fill material through the opening.