tender for construction of cement concrete drainage in alamathy b colony at alamathy panchayat , earth work excavation including cost and conveyance and all materials and all labour charges etc,.completed. , supply and filling with river sand including cost and conveyance and all materials and all labour charges etc,.completed. , cement concrete 1:4:8 mix using 40mm hbg metal including cost and conveyance and all materials and all labour charges etc,.completed. , cement concrete 1:3:6 mix using 20mm hbg metal including cost and conveyance and all materials and all labour charges etc,.completed. , supply and erecting of centering including cost and conveyance and all materials and all labour charges etc,.completed. , plastering with cement mortar 1:4 20 mm thick 10 m2 including cost and conveyance and all materials and all labour charges etc,.completed. , gst amount for providing service to government contract works for the above construction & maintenance works. { gst amount is the total gst amount for overall quoted amount (both construction and maintenance) above this row in column bb for all works in this package} (refer clause 13.2 & 13.3 of section 2 of instruction to bidders (itb) of sbd)