CONSTRUCTION OF FOUR LANE ELEVATED CORRIDOR AND AT – GRADE IMPROVEMENT FROM DESIGN CH. 0+000 TO DESIGN CH. 19+870 OF DANAPUR – BIHTA SECTION WITH PROVIDING CONNECTIVITY TO THE EXISTING ROB NEAR DANAPUR STATION (0.231 KM), 1.35 KM RAMPS & AT GRADE IMPROVEMENT TO FOUR LANE CARRIAGEWAY FROM DESIGN CH. 19+870 TO DESIGN CH. 23+500 OF BIHTA – KOLIWAR SECTION TOTAL LENGTH 25.081 KMS IN THE STATE OF BIOHAR ON EPC MODE (2 ND CALL)