Preventive measure for siltation on reservoir as suggested by CGWB, Kolkata at IRBn,HQ, Port Mout

Amount

Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by Engineer-in-charge.

All kinds of soil

Clearing jungle including uprooting of rank vegetation, grass, brush wood, trees and saplings of girth up to 30 cm measured at a height of 1 m above ground level and removal of rubbish up to a distance of 50 m outside the periphery of the area cleared.

Providing & making Gabion structure with Mechanically Woven DoubleTwisted Hexagonal Shaped Wire mesh Gabion Boxes as per IS16014:2012,MORTH Clause 2500, of required size, Mesh Type 10x12(D=100 mm with tolerance of ± 2%) Zinc coated, Mesh wire diameter3.0 mm, mechanically edged/selvedged with partitions at every 1minterval and shall have minimum 10 numbers of openings per meterof mesh perpendicular to twist, tying with lacing wire of diameter2.2mm, supplied @ 3% by weight of Gabion boxes, filled with boulderswith least dimension of 200 mm, as per drawing, all complete as perdirection of Engineer-in-charge.

Carriage of stone boulder by head load from black top road to work site for a lead of approximately 300 mtr.