SHORT TERM CONTRACT FOR REMOVAL OF POND ASH FROM ASH POND AND FILLING IN LOW LYING AREAS IN NALCO DAMANJODI

1) Earth work in excavation by mechanical means(hydraulic excavator)/manual means in all kind of soil over areas(exceeding 30cm in depth,1.5m in width as well as 10sqm on plan)including disposal of excavated earth, lead upto 50m and lift upto 1.5m, disposed earth to be levelled and neatly dressed.

3) Filling of ash by excavation of ash from Ash Pond in or under water and / or liquid mud, including pumping out water as required by dewatering, making approaches, coffer dams, flood banks, marginal banks at loading point/ash pond if required for loading ash/pond ash, transportation & unloading the same at designated locations/low-lying areas by truck / tipper etc. and spreading in layers not exceeding 30 cm in depth, levelling, watering & compacting with power/vibratory roller, rolling every third & top most layer with power/vibratory roller of minimum 8 tonnes or more including dressing of the ash filled slopping embakments/roads etc. all complete as per the direction of Engineer-in-Charge with lead as mentioned below at all lifts and depths.

3.1) Lead upto 5.00 Km.

3.2) Lead beyond 5.00 Km and up to 7.00 Km.

3.3) Lead beyond 7.00 Km and up to 9.00 Km

4) Earth work in excavation by mechanical means(hydraulic excavator)/manual means over areas (exceeding 30cm in depth,1.5m in width as well as 10sqm on plan) including transporting to the designated place/location and filling of available/excavated earth in layers not exceeding 30cm in depth, breaking clods, watering , rolling each layer with roller and rolling every 3rd and top most layer with power/vibratory roller of minimum 8 tons or more and dressing of embakments, for filling of ground depressions, providing earth cover over ash filling of required depth as directed by Engineer-in Charge with lead as mentioned below and lift up to all height in all kind of soils.

4.1) Lead up to 2.0 Km

4.2) Lead beyond 2.00 Km and up to 4.00 Km

5) Supplying and laying Random rubble masonry with approved hard stone in drains, foundation, plinth, walls below ground, culverts, retaining wall in all size and height with cement mortar 1:6 (1 cement: 6 coarse sand) including curing, cost of the stone, royalty etc. all complete as per the direction of Engineer-in-Charge. (Cement shall be supplied free of cost by the NALCO from the designated store in the Alumina Refinery complex).

6) Dry stone pitching 22.5 cm thick including supply of stones and preparing surface complete.

8) Providing and laying non-pressure NP2 class (light duty) R.C.C. Pipes with collars jointed with stiff mixture of cement mortar in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. Complete : (Cement shall be supplied free of cost by the NALCO from the designated store in the Alumina Refinery complex.)

8(i) 300 mm dia. R.C.C. pipe

10) Providing and laying non-pressure NP3 class (medium duty) R.C.C. Pipes with collars jointed with stiff mixture of cement mortar in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. Complete : (Cement shall be supplied free of cost by the NALCO from the designated store in the Alumina Refinery complex.)

10.1) 600 mm dia RCC pipes

10.2) 900 mm dia RCC pipes

10.3) 1200 mm dia RCC pipes. (Laying by mannual/machenical means)

11) Clearing jungle including uprooting of rank vegetation, grass, brush wood, trees and saplings of girth upto 30 cm measured at a height of 1m above ground level and removal of rubbish upto a distance of 50 m outside the periphery of the area cleared.

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