Abstract: The invention is a deployable culvert plug system having an elongated handle assembly with a hollow conduit, a distal end with a junction block in fluid communication with the conduit and a hinge assembly having a handle mounting plate, and a proximal end having a handle and a gas control valve for retaining a removable gas cylinder containing a pressurized gas. The gas control valve has valve trigger which selectively applies pressurized gas to the conduit. A bladder assembly having a bladder mounting plate is removably connected to the handle mounting plate, a bladder is attached to the bladder mounting plate, a check valve assembly allows pressurized gas to enter the bladder, and a hose selectively connects the check valve assembly to the junction block.