The agglomeration community gathering 9 neighbouring municipalities in the Moselle Department (Grand Est). U4 is the the oldest furnace in the Lorraine coal basin. Apart from the U4, the industrial site includes the administrative buildings, a blast house with a cockpit, a boiler house, workshops and weighing houses. The old blast furnace site is surrounded by dwellings for mill workers. The Blast Furnace Park U4 an Individual Site of the European Route of Industrial Heritage.