hellental, germany - 07 30 2020: overflows in the middle of oleftalperre, big holes high up

landmark architecture bridge waterway transport reflection river water facade monument memorial stadium building arch downtown wall canal hellental germany 2020: overflow flap decoration park oleftalsperre one big freshwater reservoir lakes west eifel close border belgium british called olef dam huge serves drinking supply flood prevention power plant included overflows middle oleftalperre holes high belgium dam wall