tender for durgapur expressway to pyrauro under singur block-5.400km in length- 1 cost for pavement works 2 cost for cross-drainagework 3 cost for protection work 4 cost for drainage work 5 cost for road furniture work 6 construction cost excluding gst and labour welfare cess 7 add @ 18% gst on cost of construction 8 add @ 1% labour welfare cess on cost of construction including gst as above 9 total construction cost including gst and labour welfare cess (7+8+9) 10 1st year routine maintenance 11 2nd year routine maintenance 12 3rd year routine maintenance 13 4th year routine maintenance 14 5th year routine maintenance 15 maintenance cost excluding gst and labour welfare cess 16 add @ 18% gst on cost of maintenance 17 add @ 1% labour welfare cess on cost of maintenance including gst as above 18 total maintenance cost including gst and labour welfare cess (16+17+18)