Foster Wheeler Environmental and Reaction Engineering International (REI) conducted site-specific case studies of cofiring wood-derived fuel and coal at existing fossil-fired boilers within the Tennessee Valley Authority (TVA) power generation system. The case studies were part of a one-year strategic biomass assessment of the TVA region, jointly funded by TVA Research and Development, the National Renewable Energy Laboratory (NREL/DOE), and the Electric Power Research Institute (EPRI). This paper addresses TVA's interest in utilizing biomass as a power generation option and the progress of the cofiring case studies through 1993. The analyses demonstrate that wood cofiring is economically feasible at cyclone boiler installations and may be a low-cost CO2 mitigation strategy for many pulverized coal boilers. Copyright (C) 1996 published by Elsevier Science Ltd.