Kerala Water Authority-KWA has published Tender For State Plan-2022-23-Uwss To Kothamangalam -Replacing Filter Media Of 4.50 Mld Water Treatment Plant Ii, Kothamangalam With Dual Filter Media Of Anthracite And Allied Works-General Civil Work. Submission Date for this Tender is 10-04-2023. Filter Media Tenders in kothamangalam Kerala. Bidders can get complete Tender details and download the document.
| Sr No | CorrigendumDate | Corrignedum | CorrigendumType | NewSubmissionDate |
| 1 | 23-Feb-2023 | Time extension | Date | 04-03-2023 |
| 2 | 06-Mar-2023 | Time extension 2 | Date | 15-03-2023 |
| 3 | 16-Mar-2023 | Time extension 4 | Date | 27-03-2023 |
| 4 | 28-Mar-2023 | Time extension 3 | Date | 10-04-2023 |
| Sl. No. | Item Description |
| 1 | Working charge |
| 2 | OD101374/2022-2023:Designing dual media filter bed Including design of under drain system |
| 3 | 100.55.5:Removing filter media from the filter beds without making any damages to the existing structures and back manifolds and stacking at a safe and convenient place for segregation process and as per the directions of the department officers etc. complete. |
| 4 | 100.55.6:Cleaning, drying and seiving the removed filter media and stacking the dismantled pebbles for reuse and spreading in the filter box in layers as per specifications and as per directions of the department officers. |
| 5 | OD101373/2022-2023:Supply of the Anthracite as per item 1 above<br>in quantity required as per design,properly<br>graded and tested by supplier specifying the<br>source of material and quality commensurate<br>to the following specifications- Effective size (d10)-1.0 to1.6mm,SP Gravity1.45-1.55, Uniformity coeft.-1.7 or lower, Hardness(Mohs scale)>2.7, carbon cont.>90%,Acid Solubility-<5% , it was also specified that the anthracite shall confirm to AWWA:B100 standards and it shall be tested in Regional research aboratory/CSIR labs of government of India for its suitability, including all cost ,<br>conveyance to site loading & unloading,excluding GST |
| 6 | 100.55.4:Supplying and stacking for measurement of filter sand having effective size 0.45 to 0.70 mm and uniformity coefficient 1.30 to 1.7, of specific gravity in the range of 2.55 - 2.65 and hard and clean, free from clay, dust and other impurities including cost of materials, labour charges and conveyance of materials up to 5 km and as per the directions of the department officers etc. complete and as per CPHEEO specification. |
| 7 | OD101372/2022-2023:Supplying filter sand by sieving and grading river sand procured from open market and the grade size must be designed in accordance with the grade of anthracite filter to avoid any interface chocking or obstruction on settling the media after back wash expansion |
| 8 | 100.55.1:Supplying of 2 to 6 mm and 6 to 12 mm size fine pebble (pebbles shall be hard, clean, free from clay, dust and other impurities), stacking in standard heaps for measurement including cost, conveyance up to 5 km and labour charges for stacking, spreading, testing and as per the directions of the department officers etc. complete as per CPHEEO specifications. |
| 9 | OD101371/2022-2023:Repair /Alteration of the under drain system by replacing all damaged pipes with suitable arrangements and providing all additional mechanism and fixtures required according to the design of multilayer filtering system complete. |
| 10 | OD101370/2022-2023:Washing and cleaning the filter chamber and rectifying damages of filter walls including glazed tiles and floor of the filter bed by concreating wherever necessary , preparing entire chamber suitable for dual media filter refurbishment, |
| 11 | OD101369/2022-2023:Refurbishing the filter beds using dual layer filter media as per the design separately laying each grade of supporting gravel manually so that each pebble is placed in close contact with each other leaving maximum void space between arid the smaller gravels above .The filter sand media and anthracite are placed above separately. |
| 12 | OD101368/2022-2023:Conducting trial run of all the filter beds for a period up to 30 days, recording performance of filter in terms of quality, quantity of filtered water and length of filter run and providing required training to the operators of KWA for the trouble free functioning and maintenance of the filter beds |
| 13 | 4.1.2:Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level:1:1/2:3 (cement : 11/2 coarse sand : 3 graded stone aggregate 20 mm nominal size) |
| 14 | 100.98.485:Supply of CI Double Flanged Sluice Valve Conforming to IS 14846 - 2000, Sluice Valve with Hand Wheel PN 1.6, Size 200mm. |
| 15 | 100.98.487:Supply of CI Double Flanged Sluice Valve Conforming to IS 14846 - 2000, Sluice Valve with Hand Wheel PN 1.6, Size 300mm. |
| 16 | 100.31.1.5:Conveying and fixing C.I. sluice valves (with cap) by providing bolts, nuts, rubber insertions etc., complete, but excluding the cost of the valve (tail pieces, if required, will be paid separately): 200mm diameter, Class I. |
| 17 | 100.31.1.7:Conveying and fixing C.I. sluice valves (with cap) by providing bolts, nuts, rubber insertions etc., complete, but excluding the cost of the valve (tail pieces, if required, will be paid separately): 300mm diameter, Class I. |
| 18 | Aerator Coverage |
| 19 | 50.12.2.4:Providing & fixing Poly carbonate multi wall plain sheet 6 mm thick as approved by the Engineer in charge and should be supplied in a single length of 12m or as decide by the Engineer in charge. The sheets shall be fixed using self drilling/self tapping screw of size (5.5x55mm) with EPDM seal complete upto any pitch in horizontal/vertical curved surfaces, but excluding the cost of purlins, rafters, trusses, and including cutting to size and shapes where ever required. |
| 20 | 14.72:Providing and fixing double scaffolding system (cup lock type) on the exterior side, upto seven story hight made with 40 mm dia. M.S. tube 1.5 m centre to centre, horizontal & vertical tubes joining with cup & lock system with M.S. tubes, M.S. tube challies, M.S. clamps and M.S. staricase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it there after. The scaffolding system shall be stiffened with bracings, runners, connection with the building etc wherever required for inspection of work at required location with essential safety features for the workmen etc. complete as per directions and approval of Engineer- in Charge. The elevational area of the scaffolding shall be measured for payment purpose. The payment will be made once irrespective of duration of scaffolding. Note:- This item to be used for maintenance work judicially, necessary deduction for scaffolding in the existing item to be done . |
| 21 | 10.28:Providing and fixing stainless steel (Grade 304) railing made of Hollow tubes, channels, plates etc., including welding, grinding, buffing, polishing and making curvature (wherever required) and fitting the same with necessary stainless steel nuts and bolts complete, i/c fixing the railing with necessary accessories & stainless steel dash fasteners, stainless steel bolts etc., of required size on the top of the floor or the side of waist slab with suitable arrangement as per approval of Engineer-in-charge, (for payment purpose only weight of stainless steel members shall be considered excluding fixing accessories such as nuts, bolts, fasteners etc.) |
| 22 | 14.1.2:Repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq meters and under, including cutting the patch in proper shape, raking out joints and preparing and plastering the surface of the walls complete, including disposal of rubbish to the dumping ground within 50 meters lead:Cement mortar 1:4 ( 1 cement: 4 coarse sand) |
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