Description: Assessment of present cross sectional profile with topographical survey of Nazra Khal 3 62 km Usthi Nainan khal 10 50 km for a total length of 14 12 km in blocks Diamond Harbour I II under Dist south 24 Parganas Name of Work Assessment of present cross sectional profile with topographical survey of Nazra Khal 3 62 km Usthi Nainan khal 10 50 km for a total length of 14 12 km in blocks Diamond Harbour I II under Dist south 24 Parganas under the jurisdiction of the Executive Engineer II Canals Division I W Dte to be conducted by River Research Institute I W Dte GoWB Mohanpur Nadia
Details: Double Levelling Survey for control points In Plain Terrain Construction of permanent Benchmark pillar at defined location w.r.t. Ground control point(G.C.P)/Great trigonometrical survey(G.T.S.) Bench Mark (including flying of G.C.P/G.T.S. Bench Mark from nearest available locations up to diiferent locations with the help of high percission instruments like DGPS/RTK/TOTAL STATION etc) as per following specification : Cast-in Situ/Precast RCC made benchmark pillar of size 0.30 m x 0.30 m x 1.5 m (0.60 m above G.L. & buried 0.90 m below & suitable P.C.C base finish) with cement concrete grade of 1:1.5:3 ,4 nos of vertical bars of 10 mm dia & stirrups of 8 mm dia @ 150 mm c/c ,including mild steel fixed plate a top (100 mm x100 mm x6 mm) inserted within concrete, including fixing on P.C.C. base (3ftx3ft) bounded with brick wall all side 300mm thick brick work for 0.6m hieight and inside portion fill up with sand including necessary painting,lettering, colouring as per enclosed drawing as
Sector: Irrigation