We found three primary sources of turbine-generator costs in our review: GETEM, NETL cost reports for 'Bituminous Coal Power Plants' (NETL, 2007; 2010; 2012; 2015; 2019b), and NETL process equipment costs (NETL, 2002). GETEM and NETL (2002) are based on ASPEN simulations while NETL (2007-2019b) uses an undisclosed combination of ASPEN simulations and vendor quotes. There is not enough information in these models to make any cost distinction between turbine working fluids or pressures. Thus, both supercritical and subcritical steam turbine costs from all years are included (i.e. NETL cases 9, 10, 11, 12, B11A, B11B, B12A, and B12B). shows the relations from GETEM and NETL. Turbine-generator gross power, , is given in kW e .