WBMAD/ULB/RSM/WS/2111/25-26

Excavation of trial pit (3.0 m x 1.0 m x (upto) 3.0 m) for fixing of pumping main, washout line raking every detection against damage of S.W. pipe line electrical cable etc. as underground obstruction including 37.5 mm timber shuttering, earth cutting, dewatering, barricading and back filling etc. as per direction of E-I-C

Taking out C.I. / D.I. pipes with specials and valves including stacking the same within a lead of 30 M as per instruction of the Engineer-in charge, (Excavation, dewatering, earth filling etc. will be paid separately). a ) Pipe up to 150 mm diameter and depth of trench up to 2 Metre.

Shifting house connection or stand post connection from existing main to new main after excavation through any kind of soil and road materials up to required depth. Dismantling existing ferrule with all fittings. Plugging hole of old main with G.I. plug. Drilling and tapping the new main. refixing the ferrule on the new main with serviceable old G.I pipes and other specials (New G.l. pipes and other specials, if required to be installed shall be paid extra) and back filling the trench with excavated materials all complete as per specification and direction of the Engineer- in-charge.

Cast iron double flanged manually operated sluice valves generally conforming to IS 14846 : 2000, having four faces and spindle nut of gunmetal, inside screw non- rising type quality gunmetal /AISI 410 spindle: seat tested to 10kg/CM2 and body tested to 15kg/CM2, flanges flat faced and drilled to 1S. : 1538 : 1993. Painted black all over with asphalt base paint. Valves tested by closed end method. 150mm dia

Construction of different dia Sluice valve /Air valve /Washout chamber in different sizes for village road where light traffic run and for main road where heavy traffic run as deptt.approved drawing with 25cm thick brick work (1:6) over cement concrete (4:2:1) over a single B/F soling over150mm.thick sand filling in foundation including earth work in excavation and disposal of excess earth from work site with RCC (1:1.5:3) cover slab 100mm / 150mm thick slab on top of chamber with 1% reinforcement in RCC cover slab with necessary opening for operation of valve all complete including cost of labour & materials as per Departmental Dwg. [Reinforcement type:- Other manufactuerers not specified] d) 150mm.dia.

Earth work in excavation in trenches and pits for water supply line and appurtnant structure in all sorts of soil or loose materials(excluding laterite or sand stone)including removing,spreading or stacking the spoil within a lead of 75 meters complete as per instruction of E.I.C. Depth of excavation not exceeding 1500 mm.

Earth work in filling in trenches and pits with good earth obtained from excavation of trenches and pits including consolidation by watering and ramming in layers not to exceeding 150 mm etc. complete as per instruction.

Removal of surplus soil and rubbish earth etc. from the working site and disposal of the same beyond the compound in conformity with the municipal rules for such disposal loading into truck and cleaning the site in all respect as per direction of E.I.C.

All types of Ductile Iron (D.I) Specials (viz. Bend, Tee, Taper, Tail piece etc), size conforming to I.S. Specification No. 9523/2000 with cement mortar lining (inside) and bituminous coating (outside). (25% of payment will be held up till successful hydraulic testing) a) All Socket Tee 100 mm to 300mm dia.

(b)Double socketed bend. 100 mm to 300mm dia.

c) Tail Piece 100mm to 300mm dia.

Carriage of different type of departmental pipes from Divisional/Sub-divisional store to the work site by truck including loading, unloading, stacking etc. including cost of fuel, lubricant and also cost of driver, helper etc. and all other taxes and charges as applicable as per direction of EIC. b) Above 5 Km upto 10 Km

Supply of Single/Double bit SBR gasket suitable for jointing CI/DI pressure pipes, conforming to IS : 5382 : 1985 [Popularly known as ‘Tyton Gasket’] (a) 100 mm dia.

(b) 150 mm dia.

Lowering any type DI pipes and specials and laying along with at any depth as per specification and direction of the E.I.C.(For laying over ground,the rates shall be reduced by 10% and that is including of cost of arrangements). (a) 100 mm dia.

(b) 150 mm dia.

Cutting of CI/DI pipes for fitting with pipes and/or specials of similar of dissimilar materials at the time of laying without damaging any part of the required length including taking out of the broken pieces from the trench and restacking the same at the specified location as per direction of the E.I.C. (a) 100 mm dia.

(b) 150 mm dia.

Chamfering the spigot end of CI/DI pipes for fitting with the socket of CI/DI pipes and/or specials in tyton jointed water mains or otherwise using electrical grinder as per specification and direction of E.I.C. (a) 100 mm dia.

(b) 150 mm dia.

Rubber gasket joint to CI/DI pipes and specials all complete to make the joint water tight as required hydraulic pressure as per specification and direction of E.I.C.(Cost of rubber gasket of approved make inciuding supply of any point within the Kolkata Municipal Area shall be paid separates. (a) 100 mm dia.

(b) 150 mm dia.

Hydraulically testing of CI/DI/AC pipe lines in section under a head of water not less than 60 m (6kg/cm2) or above as per specific requirement by filling the main with supply of water including supply of all specials and equipments like pump sets,gauges and caps,blank flange etc.all complete as per specification and direction of E.I.C. [After successful completion of test removal of ancillary specials, equipments, plugging arrangements and disposal of water shall be made at no extra cost.] (a) 100 mm dia.

(b) 150 mm dia.

Disinfection of water main by filling with water containing bleaching powder of sufficient quantity capable of maintaining a residual chlonne concentration of 10 mg/lit with the main after a detetion period of two hours and flushing the same with fresh water all complete as per specification and direction of E.I.C. [After successful completion of the process, disposal of water and bacteriological testing of sample of flushed out water from the mains should be made at no extra cost.] (a) 100 mm dia.

(b) 150 mm dia.

Labour Welfare Cess @ 1%

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