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Sapa North Liberty → Hydro Extrusion USA, to November 2026
The town's anchor technology is extrusion — aluminium billet forced through dies into the profiles the building and transport trades build with. The businesses leg carries the plant whole: the modern anchor at 400 South Main, trading in the record as Sapa North Liberty and now as Hydro Extrusion USA, LLC, the American arm of a Norwegian aluminium group — which makes this farm town, by the ordinary logic of branch industry, a producing node in a world company's technology chain. The war-production test runs against that plant's predecessors and returns a negative for this section: no wartime product built on this ground under a technology programme was found in the record reached. The divided-works pattern of the big-city files — split, sale and successors — exists here in miniature in the plant's own name succession, Sapa to Hydro, carried in the businesses leg and pointed to, not retold.