Alcoa has marked the final day of aluminum manufacturing at its Warrick County plant along the Ohio River in Indiana. The location had been operating since 1960. The company announced in January it would permanently close its Warrick Operations smelter by the end of March. Company officials noted at the time the smelter was not competitive because of a drop in prices. About 600 people worked at the smelter. Alcoa has said that about 325 employees will be laid off. The other workers either found new jobs or accepted severance or retirement packages.