Abstract: An underpinning system is provided that includes a supported underpinning pier. The underpinning pier supports a structure's foundation and may have one or more elongated support members attached thereto. The elongated support members may be micropiles, driven piles or helical piles. The underpinning pier may have a variety of configurations. In one configuration, the underpinning pier extends laterally outside of the structure's existing foundation and is attached to one or more micropiles at an exterior region of the underpinning pier, which resists the application of bending moments to the underpinning pier. A method is also provided for installing the underpinning system and/or the micropile supported underpinning pier.