Irrigation And Waterways Department Tender

Cast-in-situ cement concrete blocks or lining units as per designed section and specification,in nominal mix proportion 1:1.5:3 (corresponding to M20 Grade) with well graded stone metal aggregate, laid in position by casting in alternative panels or otherwise to keep a gap of 12mm between the adjacent units, over a layer of polythene sheet of thickness not less than 100 micron to act as a separator between the bottom surface of the block and the sand cushion/ filter material laid below the blocks, including dressing, ramming, shuttering, finishing the exposed surface by trowel without adding any additional cement and sand mortar , curing and filling the gaps between the adjacent units by 5.6mm down coarse aggregate to be compacted properly, with all leads and lifts including supply and carriage of all materials, complete, without the cost of filter. (The rate is exclusive of the cost of stone aggregate and its carriage upto site. Construction wing has to add the cost of same from the SoR of PW (Roads) to derive the consolidated rate. Consumption chart of the USoR may be used for assessing the quantity of coarse aggregates per cum of concrete). With Stone aggregatesl (Pakur, North Bengal or Rajmahal varieties) c) Nominal Mix. 1:1.5:3 with 20 mm down coarse aggregate

Supplying to site empty cement polythene bags (capacity 50kg) in good condition including stacking, incedental charges etc. all complete (capacity 50 kg).

Supplying and laying Polythene Sheet (150gm / sq.m.) over damp proof course or below flooring or roof terracing or in foundation or in foundation trenches.

Supplying, fitting and fixing with iron nails half split bamboo wailing pieces (av. dia. of bamboo not less than 5.0 cm.)

(i) For lead between 30 m to 60 m

b) Beyond 1 Km. and upto 2 Km

Earthwork from borrow pits over existing embankment or for repairs to embankment, closing breaches etc. within an initial lead of 30 metre and lift of 1.50 metre including breaking clods and depositing the same in layers not exceeding 25 cm. and rough dressing etc. complete as per profile.

Supplying, dressing and stacking at site bamboo pins above 5 cm. diameter and upto 7.5 cm. diameter. (Dia. to be measured at mid length).

Extra rate over Item Nos.1.01, 1.02 & 1.03 for all kinds of soil for every additional lead of 30 metres or part thereof beyond the initial lead of 30 metres.

c) Beyond 2 Km. and upto 3 Km

Dumping in position earth / sand filled gunny / poly bags (capacity 50 kg) within a lead of 30 metre inclusive of all lifts.

Cutting and clearing jungles including shrubs, water weeds, bushes,trees, plants, upto 30 cm. girth including removing as directed by Engineer-in-charge.

(ii) For lead between 60 m to 90 m.

Earthwork in excavation in all kinds of soil for making embankments, repairs to the embankment, closing breaches etc. as per profile including supply and transporting the earth by truck or tractor or any other mechanical means on land , including loading, transporting, unloading and stacking with all lifts bothways and head load where necessary and depositing the same on embankments, clannels, filling depressions in requisite profile, levelling as per direction of the Engineer-in-charge within a lead of,

Driving bamboo pins in standing or flowing water including scaffolding and driving appliances. (a) Where boats are not necessary. Considering each pin is to be driven 0.75 m into the soil.

Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, removing, spreading or stacking of spoils within a lead of 150 m. as directed and including trimming the sides of the trenches, leveling, dressing and ramming the bottom, and backfilling with approved material complete as perI. In all sorts of soil excluding marshy soil & rocks (soft or hard) by manual means. a) upto 3 m depth iv) Without pumping out water and shoring .

Turfing with chorkata or durba grass sods 5 cm. to 8 cm. thick in slope, crest berm etc. of embankments, canals and drainage channels etc. within a lead of 150 metre and all lifts including fine dressing, watering, ramming, guarding etc. complete. (sods will have to be arranged by the contractor at his own cost. Payment to be made on the grown grass only).