Delhi Development Authority-DDA has published Maintenance Of The Work Pertaining To Completed / Closed Schemes. Cleaning / Desilting And Redevelopment Of Existing Rainwater Harvesting Structures At 1904 Mega Housing At D-6, Vasant Kunj N. Delhi.. Submission Date for this Tender is 15-03-2022. Desilting Tenders in delhi Delhi. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Removal of SFRC Cover from its position placed over drain/rain water harvesting chambers and replacing the same at its position and stacking the same within the work area/upto 50 mtr lead i/c all T&P required complete as per direction of Engineer-in-Charge. |
| 2 | Removal of R.C.C Beams/Slabs of size 2.70*0.23*0.23 from top of Rain water harvesting chambers by mechanical means/manual and shifting within work area and placing the same in position after cleaning & operation of rain water harvesting chambers complete as per direction of Engineer-in-Charge. |
| 3 | Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by Engineer-in-charge. a) All kinds of soil |
| 4 | Supplying, filling, spreading & leveling stone boulders of size range 5 cm to 20 cm, in recharge pit, in the required thickness, for all leads & lifts, all complete as per direction of Engineer-in-charge. |
| 5 | Supplying, filling, spreading & leveling gravels of size range 5 mm to 10 mm, in the recharge pit, over the existing layer of boulders, in required thickness, for all leads & lifts, all complete as per direction of Engineer-in-charge. |
| 6 | Supplying, filling, spreading & leveling coarse sand of size range 1.5 mm to 2 mm in recharge pit, in required thickness over gravel layer, for all leads & lifts, all complete as per direction of Engineer -incharge. |
| 7 | Development of tube well in accordance with IS : 2800 (part I) and IS: 11189, to establish maximum rate of usable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by "V" notch method or any other approved method, measuring static level & draw down etc. by step draw down method, collecting water samples & getting tested in approved laboratory, i/c disinfection of tubewell, all complete, including hire & labour charges of air compressor, tools & accessories etc., all as per requirement and direction of Engineer-in-charge. |
| 8 | Providing and fixing suitable size threaded mild steel cap or spot welded plate to the top of bore well housing/ casing pipe, removable as per requirement, all complete for borewell of: a) 100 mm dia |
| 9 | Brick work with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in foundation and plinth in: a) Cement mortar 1:4 (1 cement : 4 coarse sand) |
| 10 | Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : a) 1:2:4 (1 cement : 2 coarse sand (zone-III) : 4 graded stone aggregate 20 mm nominal size) |
| 11 | 12 mm cement plaster finished with a floating coat of neat cement of mix : a) 1:4 (1 cement: 4 fine sand) |
| 12 | Providing & placing in position reinforcement concrete perforated SFRC covers (factory made) of make K,K or equivalent make approved by Engineer-in charge, rectangular in shape of required sizes over open surface drain manufactured by using M-30 Grade of cement concrete and bounded with 2.5 mm thick M.S.Sheet and using T.M.T. steel reinforcement, steel fiber etc as per special condition and as per direction of Engineer-in-charge a) Heavy duty (minimum thickness 100 mm) |
| 13 | Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading,transporting, unloading to approved municipal dumping ground or as approved by Engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved. |
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