Kerala Rural Water Supply And Sanitation Agency-KRWSA has published Installation Of Open Well Recharge Systems By Roof Top Rain Water Harvesting And Allied Works Under State Plan Scheme 2021-26 Alackode Gp Installation Of Open Well Recharge Systems By Roof Top Rain Water Harvesting Along With The Construction Of Parapet A. Submission Date for this Tender is 06-12-2021. Water Harvesting Tenders in Alackode Kerala. Bidders can get complete Tender details and download the document.
| Sr No | CorrigendumDate | Corrignedum | CorrigendumType | NewSubmissionDate |
| 1 | 17-Nov-2021 | Date Corrigendum | Date | 25-11-2021 |
| 2 | 26-Nov-2021 | Corrigendum | Date | 06-12-2021 |
| Sl. No. | Item Description |
| 1 | Appendix A: Installation o f Open well Recharge systems by Roof Top Rain Water Harvesting. |
| 2 | Above Ground Level : Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ; PCC 1:3:6 (1 cement : 3 coarse sand( zone - III) : 6 graded stone aggregate 20 mm nominal size).including all charges for cost and conveyances, watering curing etc complete;Supply and fixing in position Ferro cement rain water filtering unit of 70cm inner diameter and 75 cmouter diameter and inside depth 75 cm having top cover of 80cm diameter having 5cm thicknes; Supplying and filling filter media inside the cement concrete rings already fixed in 40mm broken stone - 0.25m thick; 20mm broken stone - 0.15m thick; 12mm broken stone - 0.15m thick; 6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 3 | Below Ground Level :Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ;supplying, conveying and placing in position (one above the other) 3 nos precast concrete circular rings of outer diameter 0.9m to 1.2m and height 0.3m inside the pit already excavated and making good the outside and covering the top of the rings with a precast concretecover slab;supplying and filling filter media inside the cement concrete rings already fixed in positionwith 40mm broken stone - 0.3m thick, 20mm broken stone - 0.15m thick,12mm broken stone - 0.15m thick,6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 4 | Appendix B: Installation of Open well Recharge systems along with Sanitization of well with dia 0.9 m to 1.20m which include construction of parapet & side platform. |
| 5 | Above Ground Level : Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ; PCC 1:3:6 (1 cement : 3 coarse sand( zone - III) : 6 graded stone aggregate 20 mm nominal size).including all charges for cost and conveyances, watering curing etc complete;Supply and fixing in position Ferro cement rain water filtering unit of 70cm inner diameter and 75 cmouter diameter and inside depth 75 cm having top cover of 80cm diameter having 5cm thicknes; Supplying and filling filter media inside the cement concrete rings already fixed in 40mm broken stone - 0.25m thick; 20mm broken stone - 0.15m thick; 12mm broken stone - 0.15m thick; 6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 6 | Below Ground Level :Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ;supplying, conveying and placing in position (one above the other) 3 nos precast concrete circular rings of outer diameter 0.9m to 1.2m and height 0.3m inside the pit already excavated and making good the outside and covering the top of the rings with a precast concretecover slab;supplying and filling filter media inside the cement concrete rings already fixed in positionwith 40mm broken stone - 0.3m thick, 20mm broken stone - 0.15m thick,12mm broken stone - 0.15m thick,6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 7 | Clearing grass and other overgrowth vegetations and small trees of girth up to 30 cm including rooting out and removal of rubbish up to a distance of 150 metres outside the periphery of the area to be cleared; earth work excavation by, mechanical means (hydraulic excavator)/manual in foundation trenches or drains(not exceeding1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus soil as directed, within a lead of 50 m; providing and laying in position cement concrete of specified grade excluding the cost of centering and shutteringwith1:4:8 (1 cement : 4 coarse sand (zone-III) : 8 graded stone aggregate 20 mm nominal size) around the wellfor platform and plasteringover itwith CM 1:4, 12 mm thick floated hard and trowelled smooth including watering, curing etc complete as per the direction of departmental officers; supplying 7 pre cast cement concrete ring of dia 0.90m to 1.20m and 0.30m height, lowering itin to the excavated portion of the existing well, (below ground level at a depth 0.9m -3 no.s rings), seating it over cement concrete; pointing the joints between the rings with cement motor, filling the gap between the rings and earth surface with locally available gravelly earth / assorted filter media, compacting it up to the ground level;placing remaining rings of the same size over it (4 nos above ground level), so as to form the side protection and parapet wall to the well including all lead, lift and other labour charges etc complete |
| 8 | Appendix C: Installation of Open well Recharge systems along with Sanitization of well with dia 0.9 m to 1.20m which include construction of parapet & side platform and Supply & fixing of Power pump and allied works for those houses having KSEB power supply. |
| 9 | Above Ground Level : Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ; PCC 1:3:6 (1 cement : 3 coarse sand( zone - III) : 6 graded stone aggregate 20 mm nominal size).including all charges for cost and conveyances, watering curing etc complete;Supply and fixing in position Ferro cement rain water filtering unit of 70cm inner diameter and 75 cmouter diameter and inside depth 75 cm having top cover of 80cm diameter having 5cm thicknes; Supplying and filling filter media inside the cement concrete rings already fixed in 40mm broken stone - 0.25m thick; 20mm broken stone - 0.15m thick; 12mm broken stone - 0.15m thick; 6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 10 | Below Ground Level :Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ;supplying, conveying and placing in position (one above the other) 3 nos precast concrete circular rings of outer diameter 0.9m to 1.2m and height 0.3m inside the pit already excavated and making good the outside and covering the top of the rings with a precast concretecover slab;supplying and filling filter media inside the cement concrete rings already fixed in positionwith 40mm broken stone - 0.3m thick, 20mm broken stone - 0.15m thick,12mm broken stone - 0.15m thick,6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 11 | Clearing grass and other overgrowth vegetations and small trees of girth up to 30 cm including rooting out and removal of rubbish up to a distance of 150 metres outside the periphery of the area to be cleared; earth work excavation by, mechanical means (hydraulic excavator)/manual in foundation trenches or drains(not exceeding1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus soil as directed, within a lead of 50 m; providing and laying in position cement concrete of specified grade excluding the cost of centering and shutteringwith1:4:8 (1 cement : 4 coarse sand (zone-III) : 8 graded stone aggregate 20 mm nominal size) around the wellfor platform and plasteringover itwith CM 1:4, 12 mm thick floated hard and trowelled smooth including watering, curing etc complete as per the direction of departmental officers; supplying 7 pre cast cement concrete ring of dia 0.90m to 1.20m and 0.30m height, lowering itin to the excavated portion of the existing well, (below ground level at a depth 0.9m -3 no.s rings), seating it over cement concrete; pointing the joints between the rings with cement motor, filling the gap between the rings and earth surface with locally available gravelly earth / assorted filter media, compacting it up to the ground level;placing remaining rings of the same size over it (4 nos above ground level), so as to form the side protection and parapet wall to the well including all lead, lift and other labour charges etc complete |
| 12 | Supply erection trial run and commissioning of open well submersible pump set (pump set to be suitably hanged using nylon rope from the frame fitted over the well parapet) of suitable capacity to pump(to fill the 500liter tank in 10 minutes) water from the well to the 500 liter capacity over head service tank already installed in position including cost of delivery pipe(best quality flexible hose)suitably connected to the inlet of the service tank, cable(Power point to pump) ,robotic starter etcincluding cost of all materials and labour charges etc complete. |
| 13 | Appendix D: Installation of Open well Recharge systems along with Sanitization of well with dia 0.9 m to 1.20m which include construction of parapet & side platform and Supply & fixing of Power pump and allied works for those houses having KSEB power supply. |
| 14 | Above Ground Level : Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ; PCC 1:3:6 (1 cement : 3 coarse sand( zone - III) : 6 graded stone aggregate 20 mm nominal size).including all charges for cost and conveyances, watering curing etc complete;Supply and fixing in position Ferro cement rain water filtering unit of 70cm inner diameter and 75 cmouter diameter and inside depth 75 cm having top cover of 80cm diameter having 5cm thicknes; Supplying and filling filter media inside the cement concrete rings already fixed in 40mm broken stone - 0.25m thick; 20mm broken stone - 0.15m thick; 12mm broken stone - 0.15m thick; 6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 15 | Below Ground Level :Supply & fixing gutter pipe with 160 mm PVC 4kg/cm2 at the edge of the roof and 90 mm PVC 4kg/cm2 down pipe from the gutter pipe already fixed in position up to the filter pit and from filter pit to well including all clamping/ welding clamps for holding the gutter pipes / down pipes in the position including cost of all specials, end closures, tees and labour charges etc complete. Supplying & fixing90 mm PVCvalve for flushing outfirst flow ofroof waterincluding cost of tee, bend etc ; labour for dismantling the well parapet to insert 90 mm PVC pipe and making good after work ; earth work in all classes of soil including dressing of sides ramming of bottom (lift up to 1.5m )and getting out the excavated earth 50m away from the edge of the trench etc ;( care should be taken to protect the side wall of the well as per direction) ;supplying, conveying and placing in position (one above the other) 3 nos precast concrete circular rings of outer diameter 0.9m to 1.2m and height 0.3m inside the pit already excavated and making good the outside and covering the top of the rings with a precast concretecover slab;supplying and filling filter media inside the cement concrete rings already fixed in positionwith 40mm broken stone - 0.3m thick, 20mm broken stone - 0.15m thick,12mm broken stone - 0.15m thick,6mm broken stone - 0.10m thick etc complete for the fully finished work. |
| 16 | Clearing grass and other overgrowth vegetations and small trees of girth up to 30 cm including rooting out and removal of rubbish up to a distance of 150 metres outside the periphery of the area to be cleared; earth work excavation by, mechanical means (hydraulic excavator)/manual in foundation trenches or drains(not exceeding1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus soil as directed, within a lead of 50 m; providing and laying in position cement concrete of specified grade excluding the cost of centering and shutteringwith1:4:8 (1 cement : 4 coarse sand (zone-III) : 8 graded stone aggregate 20 mm nominal size) around the wellfor platform and plasteringover itwith CM 1:4, 12 mm thick floated hard and trowelled smooth including watering, curing etc complete as per the direction of departmental officers; supplying 7 pre cast cement concrete ring of dia 0.90m to 1.20m and 0.30m height, lowering itin to the excavated portion of the existing well, (below ground level at a depth 0.9m -3 no.s rings), seating it over cement concrete; pointing the joints between the rings with cement motor, filling the gap between the rings and earth surface with locally available gravelly earth / assorted filter media, compacting it up to the ground level;placing remaining rings of the same size over it (4 nos above ground level), so as to form the side protection and parapet wall to the well including all lead, lift and other labour charges etc complete |
| 17 | Supply , erection, trial run and commissioning of solar pump set, solar panels including erection charges,panel board for pump set etc complete of suitable capacity to pump(to fill the 500liter tank in 10 minutes) water from the well to the 500 liter capacity over head service tank already installed in position including cost of delivery pipe(best quality flexible hose)suitably connected to the inlet of the service tank, cable(Power point to pump) ,robotic starter etcincluding cost of all materials and labour charges etc complete. |
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