The Bath County Pumped Storage Station in Virginia stores 24GWh. It was built between 1977 and 1985 at a nominal cost of $1.6 billion.[0] If we conservatively t

The Bath County Pumped Storage Station in Virginia stores 24GWh. It was built between 1977 and 1985 at a nominal cost of $1.6 billion.[0] If we conservatively take those as 1985 dollars, that's equivalent to $3.9 billion in 2019 dollars, or $162.5/kWh. That's comparable to today's price for lithium ion battery storage (~$176/kWh[1]), even before taking into account the massive real increase in cost of large infrastructure projects over the last 35 years. That said, Dominion Energy recently selected a site for a planned second pumped storage facility, conceptually entering operation in 2030.[2] It's a long way off from construction, but they claim that the current budget is $2 billion.[3][4] [0] https://en.wikipedia.org/wiki/Bath_County_Pumped_Storage_Station https://en.wikipedia.org/wiki/Bath_County_Pumped_Storage_Sta... [1] https://about.bnef.com/blog/behind-scenes-take-lithium-ion-battery-prices/ https://about.bnef.com/blog/behind-scenes-take-lithium-ion-b... [2] https://www.roanoke.com/news/local/dominion-narrows-to-tazewell-county-site-for-possible-hydroelectric-facility/article_f8376628-cea2-5cdb-8d4a-7e9b225041da.html https://www.roanoke.com/news/local/dominion-narrows-to-tazew... [3] https://www.dominionenergy.com/company/making-energy/renewable-generation/water/powering-southwest-virginia https://www.dominionenergy.com/company/making-energy/renewab... [4] https://www.nrdc.org/experts/walton-shepherd/dominions-greenwashed-pumped-storage-pipedream-wont-fly https://www.nrdc.org/experts/walton-shepherd/dominions-green...