Nor-Hachn bridge over the Hrazdan river gorge In 1981 the bridge was put into operation. Length of the bridge -640m, width -14.5m (1.5+11.5+1.5). The bridge comprises 272.5m long metallic span construction, as well 13x12m long right-bank and 16x12m long left-bank viaducts. Height above the water level of the river Hrazdan -121m. The bridge is two-storied, the first storey serving as a railway and the second as a main road. Metal span construction ... 1