Development of New Civil Enclave at Bagdogra Airport. SH- Construction of Apron, Link Taxiways and Airside Infrastructure (Phase-I)

Amount

Supplying and filling bed bisali (,locally available earth) obtained from river shore/bed in embankment or depressions in layers not exceeding 20cm (loose) in depth (or any thickness as approved by the Engineer-in-charge in case vibratory roller / soil compactor is used) including breaking clods, watering consolidating each layer with power road roller 8-10 tonnes weight or vibratory roller / soil compactor of adequate capacity under optimum moisture content condition to give at least 98% of the maximum laboratory dry density (modified proctor density) as per IS code 2720 (part VIII) complete including leveling fine dressing to the required grade, camber and slope complete as per MORTH specifications and as directed by the Engineer-in-charge with all leads and lifts (The item includes cost of work, payment of necessary royalty, carriage of moorum / suitable earth upto work site for all leads and lifts involved from all sources acquired or arranged by the contractor. Payment to be made compacted quantity only).

Preparation of granular sub-base by providing close graded material, conforming to specifications mixing in a mechanical mix plant at OMC, carriage of mixed material by mechanical transport to work site, for all leads and lifts, spreading in uniform layers of specified thickness with mechanical means including neatly leveling & dressing on prepared surface and compacting with vibratory power roller to achieve the desired density, complete and as per direction of Engineer-in-charge. (As per MoRTH specifications)

Providing, laying, spreading and compacting graded stone aggregate (size range 53 mm to 0.075 mm ) to wet mix macadam (WMM) specification including premixing the material with water at OMC in mechanical mix plant, carriage of mixed material by mechanical transport to site, for all leads & lifts, laying in uniform layers with mechanical paver finisher in sub- base / base course on well prepared surface and compacting with vibratory roller of 8 to 10 tonne capacity to achieve the desired density, complete as per specifications and directions of Engineer-in-Charge. (As per MoRTH specifications)

Construction of dry lean cement concrete sub base over a prepared subgrade with coarse and fine aggregate conforming to IS:383, the size of coarse aggregate not exceeding26.5 mm, aggregate cement ratio not exceed 15:1, aggregate gradation after blending to be as per specification, cement content not to be less than 150 kg/cum, optimum moisture content to be determined during trial length construction, concrete strength not to be less than 10 MPa at 7 days, mixed in a batching plant as per mix design, transported to site, laid with a paver with electronic sensor, compacting with 8-10 tonne vibratory roller, finishing and curing etc complete as per direction of the Engineer- in-Charge.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : (a) 1:3:6 (1 Cement : 3 coarse sand (zone-III): 6 graded stone aggregate 20 mm nominal size)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:4:8 (1 cement : 4 coarse sand (zone-III): 8 graded stone aggregate 40 mm nominal size).

Centering and shuttering including strutting, propping etc. and removal of form work for :Foundations, footings, bases for columns

Centering and shuttering including strutting, propping etc. and removal of form work for : Walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc.

Centering and shuttering including strutting, propping etc. and removal of form for : (a) Suspended floors, roofs, landings, balconies and access platform.

Steel reinforcement for R.C.C. work including straightening, cutting,bending, placing in position and binding all complete upto plinth level.: Thermo-Mechanically Treated bars of grade Fe-500D or more.

Providing and laying in position ready mixed or site batched design mix cement concrete for reinforced cement concrete work; using coarse aggregate and fine aggregate derived from natural sources, Portland Pozzolana / Ordinary Portland /Portland Slag cement, admixtures in recommended proportions as per IS: 9103 to accelerate / retard setting of concrete, to improve durability and workability without impairing strength; including pumping of concrete to site of laying, curing, carriage for all leads; but excluding the cost of centering, shuttering, finishing and reinforcement as per direction of the engineer-in-charge; for the following grades of concrete. Note: Extra cement up to 10% of the minimum specified cement content in design mix shall be payable separately. In case the cement content in design mix is more than 110% of the specified minimum cement content, the contractor shall have discretion to either re-design the mix or bear the cost of extra cement. All works upto plinth level - Concrete of M30 grade with minimum cement content of 350 kg /cum

Providing and laying Pavement Quality Concrete (PQC) produced in a batching and mixing plant having a Characteristic flexural strength i.e. flexural strength of 4.1 MPa at 28 days using Ordinary Portland cement of 43/53 grade or Portland Pozzolana Cement or Portland Slag cement conforming as per relevant IS codes, to be mixed at site, with 0.5% Super plasticizer by mass of cementitious material, fine aggregate, graded stone aggregates of 40 mm nominal size in appropriate proportion as per specification and job mix formula, laid in panels as per drawings/design as approved by the Engineer-In-Charge using Slip Form Paver or Fixed form paver including anti friction layer, joint filler board, making necessary provision for expansion, dummy and construction joint including filling with Polysulphide sealant of approved make, curing and making profile, complete as per direction of Engineer-in-Charge and specifications. The item for execution shall include all operations making pavement for intended use but not limited to following: (i) Polyethylene sheet (White in color) of thickness 400 micron conforming to IS: 2508 with 6mm thick fine sand layer. (ii) Providing and laying in position for expansion joint, 25mm thick pre-cut Synthetic joint filler board of approved make conforming to IS:1838(part 3)-2011, 45 mm from top (to be removed at the time of filling of Polysulphide sealant). (iii) Mechanically cutting dummy joints 3mm wide x 1/3rd thickness of slab which is subsequently widened to 10mm for the top 25mm depth and construction joints 10mm wide x 25mm deep as per specification. (iv) Providing and laying in position Polysulphide sealant of approved make conforming to BS-5212-1990 or IS: 11433-1995 in expansion/ construction / dummy joints including rounding off edges, applying 2 coats of approved primer compatible with the brand of Polysulphide and preparing the surface and applying masking tape along the edge of joint to prevent accidental spillage of sealant on top surface and to give neat finish to the sealant and removing the masking tape after application of sealant etc. as per the details below: (a) Expansion Joints of size 25 mm wide and 10 mm deep over 30mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and specified sketch. (b) Construction Joints of size 10 mm wide and 10 mm deep over 12mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and specified sketch. (c) Dummy Joints of size 10 mm wide and 10 mm deep over 12 mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and specified sketch. (v) Making profile as per DGCA CAR, panel drawing showing dummy, construction, expansion joints location. Note: (i) Areas inaccessible to paving equipment shall be constructed by manual/hand guided method. Areas in which manual/hand guided methods of construction become indispensable shall be got approved by the Engineer-in-Charge in writing in advance. (ii) The quantity of cement, type of cement and super plasticizer for one Cum. of finished concrete specified are for tendering purpose only. The contractor shall quote his rates assuming quantity of OPC cement as 360 Kg/Cum or 400 Kg of Portland Pozzolana Cement/ Portland Slag cement. In addition, if the actual quantity of cement & super plasticizer required as per laboratory mix design varies from the quantity assumed above, necessary cost adjustment for deviation in the quantity of cement and super plasticizer as per mix design, if any, shall be done as per the rate of cement and super plasticizer in actual supply voucher from manufacturer/authorized dealer at the time of execution. In the case of authorized distributor, the rate may be authenticated by the manufacturer. The rate of cement and super plasticizer exclusive of GST shall only be considered for payment.

Painting runway/taxi track/apron marking with adequate nos of coats to give uniform finish with road marking paint of superior make as approved by the Engineer-in-charge, i/c cleaning the surface of all dirt, scales, oil, grease and other foreign mater;al etc. and lining out complete.: New work (Two or more coats)

Providing and laying non-pressure NP4 class R.C.C. pipes including collars / spigot jointed with stiff mixture of cement mortar in the in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. complete : (a) 600mm dia. R.C.C. pipe

Preparation and submission of Structural Design-Study/3 set-Drawings of RCC Drain, Box Culvert and other related structure of appropriate size along with soft copy, hard copy of Design/Drawings, layout as well as duly vetted them from Govt. Engineering College/NITs/IITs all complete as per direction and satisfaction of Engineer-In-Charge.

Add for using extra cement in the items of design mix over and above the specified cement content therein.

Carrying out Plate Load test to determine Modulus of Subgrade reaction (K - value) at sugrade/ subbase / base layer or at locations decided by the Engineer-In-Charge as per IS Code 9214-1979 and submission of test results as per direction of Engineer -in- Charge. The test should be carried out by the specialised agency/ firm as approved by the Engineer -In Charge.

Supply of 50 mm (OD) dia ISI marked HDPE pipe of rating PE-80, PN-10 and conforming to IS: 4984 upto latest amednments including accessories like end caps, couplers etc complete as per requirement.

Supply of 160 mm (OD) dia ISI marked HDPE pipe of rating PE-80, PN-10 and conforming to IS: 4984 upto latest amednments including accessories like end caps, couplers etc complete as per requirement.

Supply of 315 mm (OD) dia ISI marked HDPE pipe of rating PE-80, PN-10 and conforming to IS: 4984 upto latest amednments including accessories like end caps, couplers etc complete as per requirement.

Supply of C.I. Transformer Housing Box, water tight, round shape of outside dia 330 mm, height 450 mm made of 10 mm thick all round including base and except top surface which is 15 mm thick having a clear opening of 220 mm at the top surface and 6 Nos. M10 tapped holes at the hole centre of 260 mm to receive light fittings base plate and bolts. The box shall have 2/3/4 nos. of clear holes on the housing box walls at minimum 75 mm above the base to receive 50 mm dia HDPE pipe. The box shall have two earth bolts of M10 X 30 mm inside the box (near the 50 mm dia holes) at 100 mm above from the base. A drain hole shall be provided at the centre of the bottom suitably tapped to receive 15 mm dia, B class GI pipe. The C.I. mould of foundry grade pig iron shall conform to latest IS as per attached sepecifications. Make and Sl No of box shall be engraved on the outer top of the Box.

Supply of 1 core X 6 sqmm, 5 kV grade, XLPE insulated, PVC sheathed, single core, multi stranded annealed copper conductor, unarmoured air field lighting cable with insulation having anti-rodent and anti-termite properties conforming to IS:7098 part-II with upto date amendments.

Supply of 1 core X 16 sqmm, 5 kV grade, XLPE insulated, PVC sheathed, single core, multi stranded annealed copper conductor, unarmoured air field lighting cable with insulation having anti-rodent and anti-termite properties conforming to IS:7098 part-II with upto date amendments.

Supply of 6 sqmm, 5 kV grade Plug and receptacle,Type-I, Class 'B' connector suitable for field attachment with 5 kV grade XLPE insulated, PVC sheathed, single core copper conductor cable as required.

Supply of 16 sqmm, 5 kV grade Plug and receptacle,Type-I, Class 'B' connector suitable for field attachment with 5 kV grade XLPE insulated, PVC sheathed, single core copper conductor cable as required.

Laying of 50mm dia HDPE pipe complete with fitting and cutting, jointing with coupler, bend etc. in in the existing open trench/existing closed trench /duct/RCC pipe complete as per site requirement.

Laying of 160mm dia HDPE pipe complete with fitting and cutting, jointing by hydraulic heat jointing method, necessary binding for holding in position etc. in in the existing open trench complete as per site requirement.

Laying of 315 mm dia HDPE pipe complete with fitting and cutting, jointing by hydraulic heat jointing method, necessary binding for holding in position etc. in the existing open trench complete as per site requirement.

Laying of 50mm dia HDPE pipe complete with fitting and cutting, jointing with coupler, bend etc.direct in ground (75 cm below ground level) including excavation and refilling the trench but excluding sand cushioning and protective covering etc., complete as required.

Installation of Transformer Housing Boxes with a base concrete of 1:3:6 of size 630 mm x 630 mm x 150 mm thick all round concrete of 1:2:4, 150mm thick,the top sloped with 1:2:4 cement concrete including providing and fixing 250 mm long 15mm dia "B" class GI pipe withy check nut for drainage of water including excavation of side shoulder and refilling (wherever the transformers boxes are not in a line the same has to be aligned in such a way that the centre fall in a straight line) etc. complete as required

Providing and fixing 6 SWG dia GI wire in open trench /on surface/ in recess for loop earthing along with the existing HDPE/ GI Pipe as required.

Providing and fixing 22 SWG dia GI wire in open trench /on surface/underground/ in recess for easy crossing of cable in the existing HDPE/ GI Pipe as required.

Making field connections by crimping 6/16 Sq.mm plug and receptacle with the existing 6 Sq.mm single core XLPE insulated and PVC sheathed copper conductor cable including sealing with HT tape and PVC insulation tape of reputed make as per direction of E-I-C etc complete as required.

Laying of one number 5 KV grade single core 6/16 Sqmm, PVC insulated and PVC sheathed stranded copper conductor underground airfield lighting cable in the existing RCC/ HUME/ METAL/HDPE pipe complete as required.

KALUWALA CONSTRUCTION PRIVATE LIMITED (BID ID -871482)

Mayasheel Ventures Limited (BID ID -871467)

NSC Projects Pvt. Ltd. (BID ID -871277)

Mukherjee Associates Infra Private Limited (BID ID -870957)

Hardayal Constructions and Projects LLP (BID ID -871381)

MACKINTOSH BURN LIMITED (BID ID -866445)