Kaiser Aluminum completes $25M expansion at Trentwood rolling mill

Kaiser Aluminum has completed a $25 million expansion at its Trentwood rolling mill in Spokane Valley, Washington, including an expansion of its horizontal heat treat furnace that boosts output by 5%. The project was completed in late October 2025.

“We are incessant planners; we plan all year long what our next five years is going to look like, and when we’re done with that, we start over again.”spokanejournal.com

• 2 sources
• spokanejournal.comKaiser Aluminum completes $25M expansion at Trentwood facility | Spokane Journal of BusinessKarina EliasNov 6, 2025
• news.metal.comKaiser Aluminum Completes $25M Expansion at Trentwood Rolling Mill - Shanghai Metals Market (SMM)Shanghai Metals Market (SMMNov 13, 2025

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