tender for Conducting Of Topographic Survey And Development Of Basin Information System For Thamirabarani Basin , fixing of ground control point by triangulation on permanent structures using three dgps with 6 hrs observation including cost of labour involved in surveying , rental of equipments , transportation charges , post processing charges , documentation charges , overhead charges etc . , complete as directed by wrd officials . , fixing of additional ground control point on permanent structures using dgps with 1 hrs observation including cost of labour involved in surveying , rental of equipments , transportation charges , post processing charges , documentation charges , overhead charges etc . , complete as directed by wrd officials . , fixing of bench mark with 3 hrs observations on permanent structures including cost of labour involved in surveying , rental of equipments , transportation charges , post processing charges , documentation charges , overhead charges etc . , complete as directed by wrd officials . , taking river cross section which includes , but is not limited to , surveying and recording the elevations and coordinates . the river cross section shall be taken perpendicular to the general alignment of the river at every 2 km longitudinal interval; ( i ) every 5 meters above the water level . ( ii ) every 2 m below the water level , ( iii ) at the centre of the river including the water level , ( iv ) the left and right limits of the river width their invert levels and water levels ( v ) the top of bank on both left and right sides of the river ( vi ) the widths of the top of banks on both sides of the river . ( vii ) either continuing the cross section surveys for 100 m beyond the embankments on both sides of the river embankments or where there are no embankments extending the survey until the ground level is 2 m above the normal water level of the river . ( viii ) taking levels of the irrigation structures including cost of labour involved in surveying , rental of equipments , transportation charges , post processing charges , documentation charges , overhead charges etc . , complete as directed by wrd officials . note: the river alignment drawing will be given by wrd officials . , taking tank cross section at inlet and outlet of the tank which includes , but is not limited to , surveying and recording the elevations and coordinates . ( i ) every 5 meters above the water level . ( ii ) every 2 m below the water level , ( iii ) at the centre of the channel including the water level , ( iv ) the left and right limits of the channel width their invert levels and water levels ( v ) the top of bank on both left and right sides of the channel ( vi ) the widths of the top of banks on both sides of the channel . ( vii ) either continuing the cross section surveys for 10 m beyond the embankments on both sides of the channel embankments ( viii ) taking levels of the irrigation structures including cost of labour involved in surveying , rental of equipments , transportation charges , post processing charges , documentation charges , overhead charges etc . , complete as directed by wrd officials .
