WEST FARGO, N.D. (AP) -- Heavy equipment company Caterpillar Inc. plans to undertake a $50 million expansion at its plant in West Fargo, N.D.Caterpillar officials and North Dakota Gov. Jack Dalrymple announced the plans Monday for the company's West Fargo plant. It's expected to create about 250 new jobs, nearly doubling the current workforce at the plant.The project includes a 225,000-square-foot addition to the plant where Caterpillar employees remanufacture parts for mining equipment. It is slated to be completed in June.Dalrymple said state and local officials began promoting the project in April, and told Caterpillar executives they would receive strong business support and benefit from low taxes.Caterpillar spokesman Greg Folley said remanufacturing is "an attractive, growing and sustainable industry."Caterpillar, based in Peoria, Ill., has more than 100,000 employees worldwide.