tender for (a)preventive maintenance and dismantle and erection of 11 kv and 440 volts overhead line of n/s feeder from lodna power house to n/s workshop via lodna colliery 1 pit chalchaya dhowra etc and (b)preventive maintenance and dismantle and erection of 11 kv overhead line of dg-i and dg-ii from dg sub-station jealgora to joyr ur colliery via lodna power house and bagdigi colliery (aprox lenght 8 km) and (c) preventive maintenance of 3.3 kv overhead line of 16 no bhaga from lodna power house to shalimar colony via 16 no. bhaga no.-5 colony lodna area office g m colony of amal.joyr ur colliery under lodna area.