Flexible containment tubes form sections of a dike for fluid containment. Structural supports are inserted into the flexible contain tubes and the tube sealed to form structure supported dike sections. For example, a supporting structure may be configured with a given length and cross sectional diameter to provide structural support to a vinyl-coated polyester tube with a 12-36 inch diameter. The structure is sealed within the tube and, in turn, the tube may be filled with a fluid such as water to create structure supported containment dike. The length of the supporting structure may be selected based on the width of an entryway to create structure supported dike section of a give length that provide a seal across the entryways against floodwaters.
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