The pozzolanic nature of fly ash makes it an excellent material for partial replacement of hydraulic cement in many road construction applications. This paper presents such an application for a specific type of cementitious fly ash from a power generating plant using fluidized bed combustion (FBC) called FBC ash. The Portland cement-FBC ash combination was used in full depth reclamation (FDR) of a low volume road in Pennsylvania. The initial mixture design for FDR was conducted for 100% cement as the chemical stabilizer, optimizing the water and cement contents through an engineered design process. Subsequent to the development of the initial mixture design, 50% of the cement was replaced by FBC ash and density and unconfined compressive strength tests were conducted on the cement-FBC ash blend to determine the impact of this replacement on strength and density. Construction of this cement-FBC ash FDR and the all-cement FDR were conducted successfully. Results from unconfined compressive tests on field cores obtained after construction indicated that specimens obtained from cement-FBC ash sections had slightly higher strength than the all-cement specimens.