Hillgrove Resources is seriously examining a project for Kamantoo mine to become a pumped hydro (PHES) facility upon the end of pit life:
- 220MW for 6 hours generating over 1,300MWh
- 5km to 275KVA line
- Site studies already complete to Regulator standards for mining project –transferrable to PHES
- Plausible commissioning by Q4 2021.
Key metrics highlight that the Kanmantoo site is one of the best sites for Pumped Hydro Energy Storage in Australia:
- Very low capital cost at < $1M / MW and < $160 / kWh
- Fast to market; possibly commissioned by end 2021
- Infrastructure already in place (ponds, water, buildings, roads, power)
- Proximity to grid and proposed renewable energy projects
- Existing studies and knowledge (environmental, geotechnical, geology, hydrogeology)
- Long established social licence to operate
- Project site 100% owned freehold land with room to establish 40MW solar facility
- Responsiveness provide spot market arbitrage and FCAS opportunities
- Low technology risk.
Mining of the lower pond anticipates completion by mid 2019. A preliminary study for a PHES facility has been completed and a DFS is underway.