Improvement of Dumduma FIS under SDMF for the year 2025-26 under Udalguri Mazbat Division (Irrigation), Udalguri Package_4

Construction of Gabion Wall

Providing & making Gabion structure with Mechanically Woven Double Twisted Hexagonal Shaped Wire mesh Gabion Boxes as per IS 16014:2012,MORTH Clause 2500, of required size, Mesh Type 10x12 (D=100 mm with tolerance of ± 2%) Zinc coated, Mesh wire diameter 3.0 mm, mechanically edged/selvedged with partitions at every 1m interval and shall have minimum 10 numbers of openings per meter of mesh perpendicular to twist, tying with lacing wire of diameter 2.2 mm, supplied @ 3% by weight of Gabion boxes, filled with boulders with least dimension of 200 mm, as per drawing, all complete as per direction of Engineer-in-charge.

Supplying & laying of drainage composite for use behind walls, between two different fills, alongside drains of road, below concrete lining of canals etc. Geocomposite for planar drainage, realized by thermobonding a draining core in extruded monofilaments with two filtering nonwoven geotextiles that may also be working as separation or protecting layers. The draining three dimensional core will have a “W” configuration as longitudinal parallel channels. Minimum thickness to be 7.2 mm, with two filtering UV stabilized polypropylene nonwoven geotextile of minimum thickness of 0.75 mm charecteristic opening size (O90) of 110 micron and tensile strength of 8.0 kN/m that will be working as separation or protecting layer, geocomposite having in plane flow capacity of 2.1 L / (m.s) at hydraulic gradient of 1.0 & 20 kPa pressure and tensile strength of 18 kN/m , with mass per unit area of 740 gsm, supplied in the form of roll for easy transportation to site of work as per detailed specification all complete as per directions of Engineer in charge.

Turfing with grass sode of largest possible rectangular and minimum size 30 cm X 30 cm X 10 cm placing closely after dressing hard the surface and fixing sode with split bamboo pegs, watering till the grass grows with lead up to 90 M and lift of 1.50 M, complete as directed.

Earthwork in filling in all soils in canal embankment and bed filling as per design section and grade by cart carriage for a minimum distance of 1 km including paying compensation of earth obtained from private land if any loading, unloading, spreading the same in embankment in layers not exceeding 15 cm thick including clearing light jungle, removing trees upto 15 cm dia and uprooting roots and stumps etc. from the seat of the breaking clods not more than 10 mm cube, ramming, dressing and roughening the seat of the embankment, profiling etc. with all lift complete as directed (Payment will be made after deduction of 12.50% shrinkage allowance from the gross quantity).

Earthwork in excavation and removal of swelled up earth mixed with silt and slurry due to sand, bailing out water in foundation trenches upto required level including shuttering, shoring, dewatering by means of pump set etc. removing the spoils to a safer distance etc, complete as directed. (ii) With dewatering

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