heidenburg, germany - 06 01 2021: dhrontalsperre, lower side of the dam wall stair d overflows

road infrastructure waterway transport tree highway lane green reservoir river grass track trail bridge asphalt vehicle hill freeway plant dhrontalsperre located hunsrück kilometers away mosel valley originally build energy production serves flood prevention next places leiwen trittenheim 2021 heidenburg germany parking lot overflow gates trier country dam wall lake tower floods top water shore dhrontalspree stairs drohntalsperre drontalsperre view 2021: lower side stair shaped overflows