Construction of 30000 litre capacity OHT Tank and providing New Borewell and Extension of pipeline at AD Colony in Melakaranthai Village and Panchayat in Pudur Block at Thoothukudi District Under DMFT Mines 2025-26 Package No TN/TUT-18/2025-26

Construction of 30000 liter Capacity OHT Tank and Providing new Borewell and Extention of Pipe Line at AD Colony in Melakaranthai Village and Panchayat

Earthwork excavation and depositing on bank with an initial lead of 10m and lift of 2m in the following classification of soils as directed by TWAD board officers. A.Hard stiff clay black cotton, hard red earth, shales, murr

a) First depth of 2m

b) Second depth of 1m

Sand filling with m-sand including cost of sand watering, ramming and consolidation etc complete as directed by officers.

Cement concrete 1:4:8 ( One of cement, four of sand and eight aggregates) using 40mm HBGS for leveling course including the cost of mixing, curing etc., complete as directed by officers.

RCC 1:1.5:3 (One cement, one and half sand and three aggregates) using 20mm HBGS excluding cost of reinforcement, centering, shuttering strutting, but including cost of mixing concrete, placing, vibrating with mechanical vibrator, finishing, curing etc., complete as directed by TWAD Board officers.

For items 1.5m to 4.5m Below GL

0m to 1.5m Below G.L.

0m to 4.50m Above GL

4.51m to 7.32m from GL

7.33m to 10.98m from GL

10.99m to14.64m from GL

14.64m ht., to 18.30m ht.,

Supplying and erecting stee centering for sides and soffits including necessary supports and shuttering to the required height for RCC items using MS angles of size 25mm×25mm×3mm of boarding, laid oversilver oak joints of size 10cm × 6.5cm speced as 90cm centre to centre and supported by casurina props of 10cm to 13cm dia spaced at 75cm centre to centre complying with standard specifications etc., completed and as directed by officers.

A) Plane surface

Below G.L.

0m - 3.30m Above GL

B)Curved surface

C)Square columns

Below GL

Painting two coats of newly plastered wall surface with ready mixed plastic emulsion paint of first class quality and of approved colour over a priming coat including thorough scrapping, clean removal of dirt, and including necessary plaster of paris putt

Supplying fabricating and placing in position of HSD steel rods for reinforcement including the cost of steel and binding wire etc., complete and as directed by officers.

Fabrication, supply, delivery and fixing of outside MS ladder wide 45cm made out of 50×50×6mm MS angle for sides and steps in 16mm MS plain rods fixed at 30cm centre to centre welded, jointed etc., providing with suitable side supports, clamps, and locking arrangements provided with one coat of red oxide paint to for providing access to roof top of OHT of suitable inclined length, including bottom anchorage and transportation and as directed by officers.The rates includes concrete Bed block in in CC 1:2:4 using 20mm HBGS at Top and bottom of suitable size with necessory anchor bolts.

Providng manhole cover of size 0.60 x 0.60M in RCC inner 1:1.5:3 with suitable reinforcement and 50x50x6mm MS angle fixed along edges and as directed by officers. (M-0640)

Provision for pipe connection arrangements for lnlet, outlrt, scour and overflow etc., including cost of pipes, specials, valve, labour charge for lifting, aligning, cutting, threading, fixing and painting of GI pipes with two coats of approved quality enamel paint etc., complete as detailed below.65mm Φ GI pipes

65MM dia GI Tee

65MM dia GI 90 Bend

65MM dia GI Coupler

65MM dia GI Union

65MM dia GI Elbow

65MMx50MM dia GI Reducer

65MM dia GM Gate Valve

50MM dia GM Gate Valve

Refilling the foundation with excavated earth including consolidation as directed by the Departmental Officials etc., complete

Sub Estimate for Water supply arrangements

Drilling of borewell size of 150mm dia in sedimentary formation using hand boreset including insertion of casing pipes anywhere in Tamilnadu including transportation from one place to another in alluvial soil sedimentary strata of clay and sand stone ,shale pebbles,boulders etc by taking pilot bore of 140mm/150mm dia and then enlarging by mud circulation method etc...complete

Drilling of borewell size of 150mm dia in Rock formed area at anywhere in Tamilnadu including transportation from one place to another in alluvial soil sedimentary strata of clay and sand stone ,shale pebbles,boulders etc by taking pilot bore of 140mm/150mm dia and then enlarging by mud circulation method etc...complete

Supply and delivery of150mm CS pvc casing pipes including conveyance charges etc..complete

Supply and delivery of Three phase submersible pumpset suitable for erection in to the borewell of 150mm dia (3 H.P.) (50*75 LPM)

Supply and delivery of Three phase Panel board with two level Guard and auto start

Labour charges for the erection of submersible pumpset in borewell including fixing and jointing submersible cable with proper clamps and earthing etc..complete

Supply and delivery of 2.5 sqmm PVC insulated and sheathed 3 core flat type copper cable

Supply and delivery of GI pipes for erection in to the borewell 40 MM

Supply and delivery of Woltman model with removal mechanism water meters, (Bulk type) conforming to ISO 4064 part I, II, III Class B and IS-2373 with life cycle test certificate from FCRI/ NABL accridiated lab. The watermeter shall have magnetic drivers or mechanical drivers and shall be versatile for installation in any position. The meters shall be hydrodynamically, hydrostatically balanced. The runner, runner chamber, pointers of the meter shall be as per ISO 4064 specification. Dry dial excavated counter housing fully protected against flooding ensuring easy reading in all climates. TWAD (WD-M1359) P.No 81

Water meter for OHT

Dirt Box

Erection Chasrges

Supply, Delivery, erection and commissioning of Batch type electro chlorinator using common salt as raw material, consisting of electrolyzers cell made of Titanium with coating mixed metal oxide such as Anabium, Cadmium, etc, capable of producing sodium hypochlorite solution within time span of 8 hours, having adjustable metering cum dosing pump capable of dozing the prepared sodium hypochlorite solution in water supply system with sensor having auto shut down when the storage if FRP tank gets empty. The storage vessel and electrolyzer tank (hypo processing tank)must be made of FRP tank coated inside with hypothalic -BIS standard, having capacity to store required quantity of hypochlorite solution, water and common salt for electrolysis process respectively. The electrochlorinator must have power source or control module for producing necessary DC current for electrolyser process from 440v, 3 phase / single phase AC supply and must have auto cut off after batch time of 8 hours. For all power connection, copper cables should be used. WD-M1505 Pg No 96 Electro chloronator 30000 Litter

Supply and delivery of 63 mm pvc 4 ksc pipes for pumping main system

Earthwork excavation and depositing on bank with initial lead of 10m and lift of 2m in narrow trenches for laying of pipesin Hard stiff clay,stiff black cotton,hard red earth,shales,murram ,gravel,earth mixed with small sized boulders etc...

Laying of 63 mm pvc 4 ksc pipes to proper line and level including jointing but excluding cost of pipes

Refilling the excavated earth after laying and joining of pipes including all labour charges etc..complete

GST Amount for providing Service to Government Contract Works for the above Construction Works. { GST Amount is the Total GST Amount for total overall quoted amount above this row in column "BB" for all works in this package}

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