short term maintenance contract (stmc) work of approaches to rail cum road bridge across river ganga at munger ghat near munger from 0.00(km 74.7 of nh-80) to km 9.394 (start point of rail cum road viaduct) and km 0.075 (end point of rail cum road viaduct) to km 5.198 (km 262.8 of nh-31) in the state of bihar