various maintenance works at industrial area barmer phase i, ii and ii ext 1. - clearing and grubbing road land. (clearing and grubbing road land including uprooting rank vegetation, grass, bushes, shrubs, saplings and trees girth up to 300 mm, removal of stumps of trees cut earlier and disposal of unserviceable materials and stacking of serviceable material to be used or auctioned up to a lead of 1000 metres including removal and disposal of top organic soil not exceeding 150 mm in thickness.) by mechanical means:- in area of thorny jungle 2 silt clearance of drains, channels and canals with lift 1.5 mtr. and lead up to 50mtr.(1.38) 3 earth, sand, lime, morrum manure or sludge for 5 km. (4.1)