As used in this article, unless the context requires a different meaning: “Board” means the Virginia Soil and Water Conservation Board. “Facility” means any structures, foundations, appurtenances, spillways, lands, easements and rights-of-way necessary to (i) store additional water for immediate or future use in feasible flood prevention sites; (ii) create the potential to store additional water by strengthening the foundations and appurtenances of structures in feasible flood prevention sites; or (iii) store water in sites not feasible for flood prevention programs, and to properly operate and maintain such stores of water or potential stores of water. “Fund” or “revolving fund” means the Conservation, Small Watersheds Flood Control and Area Development Fund. “Storing additional water in feasible flood prevention sites” means storage of water for other than flood prevention purposes above the capacity of any given structure to hold water for the purpose of flood prevention in flood prevention sites within a flood prevention project having a favorable benefit-cost ratio where it is economically feasible to provide the capacity to store additional water or the potential for additional water storage capacity.