Installation of advanced Lightning protection system and making of maintenance free earth pits at NALCO Mines, Damanjodi

Amount

Excavation of earth pit in hard rock(laterite) of size 4 Mtr. X 1 Mtr. X 1 Mtr.or bore hole of size 150 mm x 4 Mtr (suitable to site condition) , Transportation of all earthing materials and hardwares to site, preparation of chemical (GEM)with proper ratio and filling the chemical into the earth pit with positioning of High conductive earth electrode at the center of the pit ,Filling and resurfacing with black cotton soil, connection of electrode clamp with suitable copper/GI strip between earth pit and equipment,complete with brick chember and RCC cover.Party has to carry out the Numbering of the earth pit painted with synthetic enamel on the body of the earth chember with yellow body and black letter or as directed by E-I-C .Nalco shall supply all chemical earthing materials ,earth strip and cement as free issue material .

Making of earth pit by Excavation in hard rock(laterite) of size 4 mtr. X 1 mtr X 1 mtr.or bore hole of size 150 mmx 4 mtr(considering site condition) by partys own arrangement and as per direction of the E-I-C.

Supply and Laying of 40mm x 6 mm hot dip galvanized GI earth strip at 0.5 mtr below ground including connection/terminating with GI nut,bolt and washer etc as required and making of earthing grid with connecting the nearby equipment with proper welding ,painting of the joint as well as body of the earth strip with black enamel paint ,re surfacing of the same with black cotton soil is under the scope of the vendor and as directed by E-I-C.

Supply and Laying of 75mm x 10 mm hot dip galvanized GI earth strip over cable tray or any surface with suitable clamp including making of earthing grid by connecting the nearby equipment with proper welding ,painting of the joint as well as body of the earth strip with black enamel paint and as directed by E-I-C.

Providing and laying in position reinforced cement concrete 1:2:4 for all depths below and up to a plinth level in foundations,t including tamping,ramming,vibrating,curing, shuttering etc.all as specified in any shape,position,thickness and finishing the top surface rough or smooth as specified and directed, including supply of all materials and all complete for concrete of M-15 grade with 20 mm and down size graded crushed stone aggregates,including all labour and materials, as per approved drawing, specifications of this tender and directions of Enginer-in-Charge. Nalco shall supply cement and TOR steel as free issue material

Earth work Excavation by mechanical means or manual in foundation, earth pits , counter pose earthing ,pole foundation,stay foundation,diversion of drain,cable trenches and other Misc. earth work in Hard rock /Laterite including dressing of soil and disposal of surplus excavated soil with a lead distance of 50 mtr(blasting probhibited) and as per direction of E-I-C.

Painting of steel works,33 kv line Tower stub,Rail poles ,earth pits with synthetic enamel paint suitable for exterior application of required shed with two or more coats (One coat metal primer and two coat systhetic enamel paint of approved make) and as per direction of EIC.

Numbering of towers ,poles ,display of caution boards,earth pit status,etc by Painting and writing letters with fluorescent enemal paint at different areas and sub-stations.All painting materials shall under scope of the contractor.

M/s Maa tarini Engineers

RRR PERESTROIKA

CHINTAMANI ENTERPRISES

SUSHANTA ENGINEERS

ODISHA POWERCARE PRIVATE LIMITED

MISHRA ELECTRICAL SERVICE