A groundbreaking ceremony was held Tuesday to celebrate the start of construction for a $20 million, 160,000-square-foot industrial building for Charter Wire on a 7.8-acre site in the Menomonee Valley. The company will have 115 employees in the building when construction is completed. The new facility will replace Charter Wire’s current facility at 114 N. Jackson St. in the Historic Third Ward. Oconomowoc-based MSI General Corp. is the architect and general contractor for the project.