EMP Saskatchewan lithium demo plant: design, capex and risk lens for engineers
Reviewed by Tom Sullivan
First reported on MINING.com
30 Second Briefing
EMP Metals has completed construction of its Project Aurora demonstration plant at the Viewfield lithium brine project in southeast Saskatchewan, now tied directly into production and waste brine disposal wells and running fresh brine through partially commissioned systems. The Aurora facility will process 10 m³/day of raw brine to de-risk a planned commercial plant targeting more than 3,000 tonnes of lithium per year, supporting a project PEA that outlines 12,175 tonnes LCE annually over 23 years. Viewfield’s post-tax NPV is estimated at about US$1 billion with a 45% IRR, US$571 million capex and a 2.1-year payback.
Technical Brief
- Project Aurora demo plant is hard-piped into both production and waste brine disposal wells at Viewfield.
- Commissioning is ~50% complete, with fresh production brine already circulating through partially integrated process systems.
- Viewfield lies ~140 km southeast of Regina, with Mansur located ~40 km to the northwest.
- EMP’s Viewfield and Mansur assets contain 931,038 t indicated LCE at 141 mg/L Li and 1.11 Mt inferred at 112 mg/L Li.
- The 2023 PEA for Viewfield assumes brine feed grading 128 mg/L Li over a 23‑year operating life.
- Capital cost estimate of US$571 million includes a US$52 million contingency allowance.
- EMP’s current market capitalisation is about C$63.3 million, with a 12‑month share price range of C$0.26–C$1.03.
Our Take
With a post-tax NPV of about US$1 billion against capital costs of US$571 million at Viewfield, EMP Metals sits at the higher-return end of the lithium project spectrum in our database, which could make it a takeover or JV target for established producers such as Albemarle once the Saskatchewan demo performance is proven.
The indicated and inferred brine grades at Viewfield and Mansur (112–141 mg/L lithium) are modest compared with hard-rock spodumene projects like Lithium Ionic’s Bandeira in Brazil from our related coverage, so project economics will hinge heavily on direct lithium extraction efficiency and low operating costs rather than grade alone.
Among recent lithium-tagged items in our mining coverage, few are in the Canadian Prairies, so EMP’s Saskatchewan brine play effectively tests whether Alberta-style DLE concepts can be commercialised in a new basin, which could open a regional cluster of similar projects if the Aurora demonstration facility meets its Q3 start-up and performance targets.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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