Standard Lithium and Equinor, partners in the Smackover Lithium joint venture, are targeting a final investment decision by year end on the South West Arkansas project, the first large scale lithium development planned for the Smackover Formation. Construction would start early in 2027 and production in 2029 if the decision is positive. Standard owns 55 percent of the venture and operates it; Equinor holds 45 percent.
The project’s first stage is designed to produce 22,500 tonnes a year of battery grade lithium carbonate over a 20 year life, from measured and indicated resources of 1.18 million tonnes of lithium carbonate equivalent at an average concentration of 442 milligrams per litre. The September 2025 definitive feasibility study put initial capital costs at $1.45 billion including a 12.3 percent contingency, with an after tax net present value of $1.28 billion and an 18.2 percent internal rate of return at a long term lithium carbonate price of $22,400 a tonne. Average cash operating costs were estimated at $4,516 a tonne.
Financing and sales cover are the remaining gates. The United States Department of Energy finalised a $225 million grant for construction in January 2025 and completed its environmental review in May with a finding of no significant impact, and the project sits on the federal FAST-41 permitting dashboard. Export credit agencies including the Export-Import Bank of the United States and Export Finance Norway indicated interest in more than $1 billion of project debt in December 2025, though those were expressions of interest, not commitments. Offtake agreements with Trafigura and LG Energy Solution cover up to 20,000 tonnes a year, about 89 percent of planned output if optional volumes are included.
The technology risk is the honest caveat. Direct lithium extraction from oilfield brines has not yet run at this scale in the United States, and Standard’s case rests on a demonstration plant near El Dorado that has operated since 2020 and processed more than 160 million litres of brine. The company’s second project, Franklin in Texas, carries a preliminary economic assessment for up to 70,000 tonnes a year from the early 2030s, and management talks of 100,000 to 150,000 tonnes a year across its portfolio within a decade. None of that is committed until Arkansas is financed.