Damage to two RCC Bridges within 10 km focal distance during the December 31, 1984 Sonaimukh earthquake of MB 5.6, in Cachar region of Northeast India, has been described. Sonaimukh bridge has been damaged more compared to Rukni bridge inspite of its belng at larger focal distance. The greater damage to Sonaimukh bridge is due to its transverse orientation with respect to the principal direction of ground motion. The retaining walls have also contributed to the reduction in damage for the Rukni bridge. The detailed observations indicate that the two bridges can be repaired.