Project West Solution Mine and Soda Ash Plant (“Project West”) is a new Greenfield soda ash production project under development by West Soda LLC, a subsidiary of WE Soda US LLC. On December 12, 2025, West Soda LLC filed an amendment request with the Wyoming Department of Environmental Quality to push the previously proposed construction start date from before December 2025 to on or before July 2027. This request was officially approved on March 5, 2026⁽¹⁾.  In an investor presentation dated March 3, 2025, WE Soda previously announced phased growth of Wyoming operations through optimization of existing alkali facilities and staged expansion using solution mining, to add an estimated 1.0-1.5 million metric tons per annum (1.1-1.7 million short tons per annum) of production at Westvaco⁽²⁾.

¹Source: Wyoming Department of Environmental Quality: Public Notice of Amendment Approval for the Project West Solution Mine and Soda Ash Plant 23-02 - https://content.govdelivery.com/accounts/WYDEQ/bulletins/40d1407

²Source: WE Soda: The Acquisition of Alkali Investor Presentation – 3 March 2025 - https://wesoda.com/documents/alkali-investor-presentation