Concrete float and method of manufacture

A concrete floating dock can be formed using a form that has an inner and an outer form. Concrete sections can be cast such that they include a deck portion and two longitudinally extending side walls that extend downwardly from the deck portion. The concrete sections can be removed from the form and coupled together to form a concrete floating dock. One or more buoyancy elements can be positioned in the cavities of the fully cured concrete sections before or after the concrete sections are coupled to each other.