A sealing panel device for use with a guillotine well having a length, width, and depth is provided. In some embodiments the device may comprise an elongate panel having a length and width that is greater than the length and width of the guillotine well. A first arm and a second arm may be coupled to the elongate panel. The first arm may comprise a width greater than the width of the guillotine well and a depth greater than the depth of the guillotine well. The second arm may comprise a width greater than the width of the guillotine well and a depth greater than the depth of the guillotine well. A sealing gasket may be coupled to the elongate panel, first arm, and second arm which may extend around the guillotine well when the device is positioned over the guillotine well of a Modular Causeway Systems section.