Mining, Minerals & Quarrying Tender Results

Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilling rig or combination rig as required to suit the site condition as per the direction of the Engineer in charge including use of own rig with its accessories, tools and plant and consumables etc for lowering of 200mm/150mm dia G.I/P.V.C/M.S casing pipes for housing fitted with socket and with or without well screen as per the necessity for soft, medium, hard and boulder formation(G.I/P.V.C/M.S casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and withdrawing after completion of the tube well), 200mm dia to 400mm dia in overburden portion including packing of gravel supplied by the contractor for 400mm dia bore.

Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilling rig or combination rig as required to suit the site condition as per the direction of the Engineer in charge including use of own rig with its accessories, tools and plant and consumables etc for lowering of 200mm/150mm dia G.I/P.V.C/M.S casing pipes for housing fitted with socket and with or without well screen as per the necessity for soft, medium, hard and boulder formation(G.I/P.V.C/M.S casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and withdrawing after completion of the tube well), 200mm dia to 400mm dia in overburden portion including packing of gravel supplied by the contractor for 400mm dia bore.

Construction of 1 nos production wells including scientific source finding through consolidated and unconsolidated rock with down the hammer drilling rig or combination rig with PVC pipe and installation of submersible pump set with all acessories Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilling rig or combination rig as required to suit the site condition as per the direction of the Engineer in charge including use of own rig with its accessories, tools and plant and consumables etc for lowering of 200mm/150mm dia G.I/P.V.C/M.S casing pipes for housing fitted with socket and with or without well screen as per the necessity for soft, medium, hard and boulder formation (G.I/ P.V.C/ M.S casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and withdrawing after completion of the tube well), 200mm dia to 400mm dia in overburden portion including packing of gravel supplied by the contractor for 400mm dia bore only Drilling of 200mm dia bore 00 mtr to 30mtr 1 x 30.00 mtr =

Design of sewage network as per existing norms and standards for Vadinar station including vetting of design of sewage network from IIT/NIT and obtaining approval from Accepting Officer. The topographic survey of required areas shall be carried out to decide the best and most economical route/ alignment of the sewage lines in most efficient manner. The design of sewage network shall be done to carry sewage through gravity till sewage treatment plant as far as possible and to avoid intermediate pumping. Pumping arrangement shall be incorporated only if transport of sewage through gravity is not possible or becomes uneconomical. The cost benefit analysis shall be done prior to deciding the best alignment/ arrangement of sewage network. Following points to be considered while designing sewage network:- (a) Depth of sewer network to be restricted upto 3.5m depth. In exceptional cases, depth can be increased to 4m but not more than cumulative 5% of total sewer network. (b) When water table is high, avoid sewer network being submerged under water table for more than 10% during high water flow (can vary as per location). (c) Manholes spacing to be ensured as per CPHEEO Manual for Sewerage and Sewage Disposal 2013. In cases when sewer cleaning machine for long length are available for Maintenance & Operation (M & O), the distance can be increased accordingly. However all junctions will have manholes with drop of 30mm. (d) Self-cleansing velocity to be provided atleast once a day. Where velocity is not achieved, flushing point using treated waste water to be placed. Automatic Flushing Tank (AFT) can also be used. (e) Initial excavation depth of sewer can be reduced to 0.8m and in exceptional cases 0.65m, provided overburden is within design limit of sewer network. Wherever sewer line depth is less than 1m, caution markers be placed. Potable water pipleline not to be placed below the sewer pipeline.

Labour for drilling a perfectly vertical bore holes of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilled rig as required to suit the site condition as per the direction of E.I.C. including use of own rig with its accessories, tools and plants and consumable etc. for lowering of 125mm dia consumable etc. for lowering if 125mm dia PVC/GI Pipes for housing filled with socket and with or without well screen as per the necessity for soft, medium, hard and boulder formation (GI/PVC) casing pipes it required to prevent collapse of overburden portion is to be provided by the contractor including lowering and withdrawing after completion of tubewell. (a) Drilling of 125mm dia bore. i) 0m to 40m

Drilling of 150mm dia deep borewell in overburden soil including labour charges and transportation charges