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| 1 | PART-I: MAINTENANCE DREDGING DURING MONSOON PERIOD |
| 2 | MaMaintenance Dredging during Monsoon period(July/August) for 12 days in each year on Day Rate Basis by deploying Trailing Suction Hopper Dredger of hopper volume not less than 6000 Cum and to be dredged the materials (sediments / solids comprising of silt/sand/clay) @ 67000 Cum (Minimum) per day in Zone III of Outer Approach channel and adjoining part of lagoon, Zone-IV including Old Dock Arm in all types of soil from the existing levels up to the depth desired by the port at the time of dredging the area, up to minimum 5 mts. away from Fender Face of the berth(s), including Fuel escalation, Mobilisation & De-mobilisation charges for TSHD including Survey launch, routine boat and hire charges of all plant & equipment, cost of labour, materials and consumables etc., Thedredged material to be taken away by the dredging Contractor subject to conditions laid down atItem No.1 of PART-III of this BOQ for beneficial use by recycling of dredged material . In case the dredged material is not taken away by the Contractor for beneficial use for any reason, then the dredged. material shall be transported and dumped in the designated dumping ground, situated at a distance about 7.00 K.M towards North-west direction from the intersection point of the outer approach channel with (-) 15.40 mtrs contour line (the drawing of the dumping ground enclosed).The following formula will be adopted for hopper measurement of materials in Trailer Suction Hopper Dredger Volume of solid= VM=TDM /SMTDM = (SN-SW)xVTxSM (SM–SW)Where TDM =Tonnes of dry materialSN =Average density of the wet load=GT/VT(please refer Tender Document for Further Detailed Specification) |
| 3 | PART-II:POST MONSOON MAINTENANCE DREDGING |
| 4 | Mobilisation of Trailing Suction Hopper Dredger of hopper volume minimum 6000 Cum with personnel, equipment and operating supplies to the dredging site at NMPA so as to commence Post Monsoon Maintenance Dredgingon the date of commencement as per Letter of Acceptance. Mobilization charges will be paid after completion of 5% of Post Monsoon Maintenance Dredging in each year |
| 5 | Post Monsoon Maintenance Dredging on in-situ basis by deploying the Trailing Suction Hopper Dredger of hopper volume minimum 6000 cum in the areas of Outer Approach Channel, Lagoon (drawing of the Dredging area enclosed), including Oil Dock Arm, Turning Circle and in front of K.I.O. Berth (Extension Lagoon). The areas required to be dredged from the existing levels to their minimum designed depths up to a depth of (-) 8.00 mCD at B.No. 1, and in front of B.No.1 up to Centre Line of O.A.C, (-)12.00 mCD at B.No. 2, ( -) 11.00 mCD at B.Nos.3, (-) 10.50 mCD at B. No. 4 to 7 in the ODA, & 14 (E), (-) 14.00 mCD at B. No.8 & 12 (-)12.50 mCD at Berth No.9, (-)15.10 mCD at Berth Nos.14 (W),15,16,10, 11, & 13.The outer approach channel is of total length 7500 mts. (towards sea which depends upon the shifting of the (-) 15.40 m contour due to siltation). Maintenance dredging of all these areas involves dredging in all types of soil comprising of clay, silt, sand etc.Thedredged material is to be taken away by the dredging Contractor subject to conditions laid down atItem No.1 of PART-III of this BOQ for beneficial use by recycling of dredged material . In case the dredged material is not taken away by the Contractor for beneficial use for any reason, then dredged material shallbe transported and dumped in the designated dumping ground, situated at a distance about 7.00 K.M towards North-west direction from the intersection point of the outer approach channel with (-) 15.40 mtrs contour line ( the drawing of the dumping ground enclosed).Cost including Survey launch, routine boat and hire charges of all plant & equipment, cost of labour, materials and consumables (please refer Tender Document for Further Detailed Specification) |
| 6 | Dredging on In-situ Basis by using any special dredging equipment viz., Grab/ Cutter/ Bucket/ Plough etc. with allied equipment to dredge/clear the area within 0 to 7 mts. from the berth face whenever the berth is vacant without affecting the port operations from the existing levels in all types of soils comprising of sand, silt deposits of spillage of iron ore / mines, fallen wooden logs, tyres, fenders, boulders, rock /concrete pieces, debris, steel plates, chains, wire ropes, cement bags, tarpaulins, etc. up to a depth of (-) 8.00 mCD at B.No. 1, and in front of B.No.1 up to Centre Line of O.A. C, (-)12.00 mCD at B.No. 2, ( -) 11.00 mCD at B.Nos. 3, (-) 10.50 mCD at B. No. 4 to 7 in the ODA, & 14 (E), (-) 14.00 mCD at B. No. 8 & 12 (-) 12.50mCD at Berth No. 9, (-) 15.10 mCD at Berth Nos.14(W), 15,16,10,11and 12 without damaging the existing structures, fenders etc., and dumping the dredged material at deeper areas away from berth face and same shall be dredged/cleared simultaneously by TSHD andtaken away by the dredging Contractor subject to conditions laid down at Item No.1 of PART-III of this BOQ for beneficial use by recycling of dredged material . In case the dredged material is not taken away by the Contractor for beneficial use for any reason, then dredged material shallbe transported and dumped in the designated dumping ground, situated at a distance about 7.00 K.M towards North-west direction from the intersection point of the outer approach channel with (-) 15.40 mtrs contour line ( the drawing of the dumping ground enclosed). Cost including Mobilisation and De-mobilisation charges for TSHD including Survey launch, routine boat and hire charges of all plant & equipment, cost of labour, materials and consumables etc., complete for the (please refer Tender Document for Further Detailed Specification) |
| 7 | Diving charges to collect Sea bed samplesQuantity for 1st year: 12 Hrs.Quantity for 2nd year:12 HrsQuantity for 3rd year:12 Hrs |
| 8 | Dredging all types of soil including sand, silt, loose clay and hard /stiff clay below the deck structure area of pump house No.1,2 &3from the existing level to (-) 6.00 mCD for 1&2 and (-) 10.00 mCD for Pump house No.3 with a tolerance of +0.5 mts including slope and to discharge dredged material to the dock arm areas uniformly beyond a lead of 150 m as directed by the Engineer-in-charge by deploying a Circle pump Dredger 250 cum per hour output or a suction pump dredger or any other suitable method including cost of labour, mobilisation and de-mobilisation etc., complete for successful completion of work. The material shall be dredged/cleared simultaneously by TSHD and taken away by the dredging Contractor subject to conditions laid down at Item No.1 of PART-III of this BOQ for beneficial use by recycling of dredged material. In case the dredged material is not taken away by the Contractor for beneficial use for any reason, then dredged material shall be transported and dumped in the designated dumping ground, situated at a distance about 7.00 K.M towards North-west direction from the intersection point of the outer approach channel with (-) 15.40 mtrs contour line (the drawing of the dumping ground enclosed).Quantity for 1st year: 6000 cum.Quantity for 2nd year:6000 cumQuantity for 3rd year:6000 cum |
| 9 | De-mobilisation of Trailing Suction Hopper Dredger of hopper volume minimum 6000 Cum with personnel, equipment and operating supplies from the dredging site of NMPA after completion of Post Monsoon Maintenance Dredging in each year. Demobilization charges will be paid after issuing of completion certificate by the Port. |
| 10 | PART-III: TAKING AWAY OF DREDGED MATERIAL |
| 11 | Note: The amount quoted for this Item by the bidder, will be deducted from the total quoted amount for Part-I and Part-II of this BOQ and L1 bidder will be decided accordingly. In case the Dredging Contractor do not take away the dredged material in part & full for reuse / recycling and dump the dredged material in designated deep sea dumping area, the quoted amount for this item will still be deductedTaking away of dredged material for reuse / recycling of dredged material generated out ofI.No.1 of Part-I of BOQ and I. Nos. 2, 3 & 5 of Part II of BOQfor beneficial use subject to conditions in the Environmental Clearance for disposal of dredged material after taking due permissions from the competent State Authorities, as required, by the dredging Contractor. Available data on soil type and characteristics of earlier dredged material is furnished in the tender. The dredging contractors /companies after assessment of the characteristics of dredged material and its beneficial use shall quote the rate. The Valuation of dredged material (Quoted amount for this item i.e.,Part-II) will be deducted from the Dredging cost quoted(I.No.1, 2 & 4 of Part I of BOQ) in arriving Net cost quoted. |
