US Highway 65 & Island Harbor Road, Pine Bluff, Jefferson County, AR 71601Clean Energy Developers / Entergy Arkansas
MISO generator interconnection queue milestone filings and regional transmission planning studies set commercial operation for June 2030.[1]
The Jefferson Energy Storage Project is a utility-scale 500 MW / 2,000 MWh 4-hour battery energy storage system (BESS) located near Pine Bluff in Jefferson County, Arkansas. Sited across industrial parcels along the Arkansas River corridor, the massive battery installation connects into Entergy Arkansas's 500 kV bulk electric transmission network in MISO, delivering long-duration grid flexibility, capacity firming, and frequency stability to regional manufacturing and paper mills.