Described herein are various embodiments of a tower foundation system for an above-ground tower. For example, according to one representative embodiment, a tower for supporting a structure above the ground includes a foundation and a second support column section. The foundation includes a first support column section and a plurality of arms that extend radially outward away from an outer surface of the first support column. Additionally, the foundation includes a plurality of elongate anchors coupled to the plurality of arms. The first and second support column sections include each include a plurality of engagement elements engageable with each other to splice the first and second support column sections together. More specifically, the second support column section is insertable into and rests upon the first support column section such that the plurality of engagement elements engage each other.