From 1911 onwards, the electricity of the town of Marckolsheim was generated by a coal plant situated next to the Rhone-Rhine canal. Since 1962, this role has been carried out by the hydroelectric plant set up on the Grand Canal of Alsace. On average, the plant produces 928 million kWh per year. The construction of this plant, along with two locks and a dam of the river Rhine, completely changed the local landscape. You can watch boats passing through the lock from the observation bridge.