Harper worked with Clemson University to perform upgrades to one of the main digesters on the campus. Both digesters were in need of significant repairs to continue handling the increasing capacity. Work included installation of a new generator and process piping. Harper also installed a new control system and performed sitework to improve the area adjacent to Lake Keowee. New diffusers, blowers, and variable frequency drives were included in the upgrades to replace existing out-of-date systems.