Request for Proposal (“RFP”) issued by NHIT Eastern Projects Private Limited (NEPPL) for Engagement of Agency/Firm for Drain Civil works for controlling the Waterlogging conditions developing near RUB on Four-lane of Chichra-Kharagpur Road Section of NH-49 with project length of 56.120 kms in the state of West Bengal.

Dry Stone Pitching Providing and laying dry stone Pitching of 300mm on slopes laid over prepared filter media. The stones for pitching shall be obtained from quarries and shall be sound, hard, durable and fairly regular in shape. Round boulders shall not be allowed. The size and weight of stone shall conform to Clause 5.3.5.1 of IRC: 89. No stone shall weight less than 40Kg. The size of spalls shall be a minimum of 25mm and shall be suitable to fill the voids in the pitching. The quoted rate shall include all costs necessary to complete the work, but not limited to the cost of dry stone, transportation of dry stone, disposal of excess material and laying of dry stone as per approved construction methodlogy. Ensure proper side slope for drainage and maintain safety measures including barricading and signage during the execution are essential and must be included.

Filter Media beneath Dry Stone Pitching Providing and laying filter media of 150mm thickness over the embankment slope. Before laying the pitching, the side of banks shall be trimmed to the required slope and profiles by means of lines and pegs at interval of 3m. Depressions shall be filled and thoroughly compacted. The choice of material for the filter shall be as per the technical specification or Engineer's recommendation. One or more layers of graded materials to act as a filter medium shall be provided underneath the pitching, to prevent loss of the embankment material and build up of uplift head on the pitching. The quoted rate shall include all costs necessary to complete the work, but not limited to the cost of approved filter material, transportation of filter material, disposal of excess material and laying of filter layer as per approved construction methodlogy. The rate also covers the use of necessary equipment such as compactors, rollers, excavators etc. Ensure proper side slope for drainage and maintain safety measures including barricading and signage during the execution are essential and must be included.

Plain cement concrete M-20 Providing and laying Plain Cement Concrete of M20 grade including preparation, formwork where necessary, placement of concrete as per mix design, proper compaction, finishing, and curing as per specifications. The work shall include supplying all materials, labour, tools, equipment, mixing, placing, compacting, curing, and all incidental works required for proper completion, including compliance with all safety measures .

Plain cement concrete M-15 Providing and laying Plain Cement Concrete of M15 grade including preparation, formwork where necessary, placement of concrete as per mix design, proper compaction, finishing, and curing as per specifications. The work shall include supplying all materials, labour, tools, equipment, mixing, placing, compacting, curing, and all incidental works required for proper completion, including compliance with all safety measures .

Excavation in Soil using Hydraulic Excavator and Tippers with disposal. (Excavation for Median Chute Drain including cutting and loading in tippers, trimming in accordance with requirements of lines, grades and cross sections, and transporting to the embankment location within all lifts and lead)

Dismantling of existing cement concrete by mechanical or manual means, including breaking, removal, and disposal of the dismantled material, complete in all respects as directed by the Engineer-in-Charge.

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Details of Earthen Shoulder

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Details of Median Longitudnal Drain

Total Lenght

1. Pipe Culvert

Pipe Culvert

1 X 1 X 0.750 Mtr Chamber with Ms Weld Mesh Jali

Median Longitudinal Drain

Median Chute Drain

1. Box/Slab Culvert

Box Culvert

1 X 4 X 0.750 Mtr Chamber with Ms Weld Mesh Jali

Median Longitudinal Drain

Median Chute Drain

1. Minor Bridge

Minor Bridge

Median Longitudinal Drain

Median Chute Drain

Damaged Stone pitching details

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Volume For Stone Pitching

Damaged Chute Drain Details

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Rate Analysis of Chute Drain

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Chute Drain Elevation

Chute Drain Dimension