**Appendix A**

**Table A1.** Assessment of the investment costs of a UPSH plant, considering an FT with 219 MW of output power and a DTC of 8 h. Civil works, hydromechanical equipment and penstock, hydropower equipment, electric substation and grid connection.



**Table A2.** Assessment of the investment costs of a UPSH plant, considering an FT with 219 MW of output power and a DTC of 8 h. Commissioning and project management.

**Figure A1.** Capital cost breakdown for a UPSH plant with surface upper reservoir and underground lower reservoir. **Figure A1.** Capital cost breakdown for a UPSH plant with surface upper reservoir and underground lower reservoir.
