Topographical Surveys For Proposed Canal Alignment Of Sone Dam- Southern Tributaries Of Ganga (Stg) Link Project From Sone River (Proposed Kobra Barrage) To Sakri River (Stg), )(I) Rd 0.00 To 15.22 Km, (Ii) Rd 75.00 Km To Rd 82.03 Km, (Iii) Rd 103.75 Km To 198.76 Km (Total 117.26 Km) Hydrographic/Bathymetric Survey In Submergence Area, Grid Survey For Barrage Area, Topographic And Grid Survey For Cross Drainage (Cd) Structures & Sample Command Area Using Latest Survey Instruments / Techniques E.G. Dgps / Total Station / Drone/ Satellite Technology Etc. Including Fixing Of Base Line Pillars (Temporary Bench Marks), Permanent Bench Marks, Plotting, Preparation Of Contour Plans And Report Etc.