Execution of preliminary cum final location survey with hybrid modern survey technology using dgps (differential global positioning system) integrated rtk (real time kinematic)/ppk drone (post processed kinematic, npnt compliant from dgca) based photogrammetry and lidar system, soil investigation & yard plan, preparation and submission of various detailed drawings and preparation of suitable nos of detailed project reports for proposed new b.g. lines (246 km) for the sections as per feasibility 1. kurmitar iron ore mines to barsuan station through dholtapahad-17.40km, 2. dholtapahad to barbil- 71.60km, 3. dholtapahad to nayagarh via sanindpur mines-45.60km, 4. barbil to nayagarh via guali, nuagaon, ganua, balda block with triangle formation between sanindpur and ganua -111.4km] in connection with providing rail connectivity to the unconnected major mines in the districts keonjhar & in state of odisha of south eastern railway. estimate no. 1/fls-sur/2021.