Post Monsoon Maintenance Dredging at New Mangalore Port for the years 2023-24, 2024-25 and 2025-26 (3 Years)

Amount

PART-I:

Maintenance Dredging on in-situ basis by deploying the Trailer Suction Hopper Dredger 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 as detailed below. During the course of Dredging if any hard strata encountered, the Dredging Contractor has to deploy Cutter suction dredgers/Bucket Ladder Dredgers or any suitable equipment to clear these hard patches. 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 Be rth 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 fine silt, sand, hard/ stiff clay, any hard strata encountered due to settlement of fine silt, sand etc. The dredged material is to be taken away by the dredging Contractor for reuse / recycling of dredged material generated out of SI.No.1, 2 & 4 of Part I of BOQ for 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. The bidders shall make their own arrangement for dumping area outside the Port limits for temporary storage of dredged material since NMP doesn’t have on shore dumping area in its premises. The responsibility of dumping of dredged material, storing at yard, treatment of the dredged material and subsequent disposal to prospective users will be the responsibility of the Dredging Contractor, 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 satisfactory completion of the Dredging work. Quantity for First year = 61,60,000 Cum Quantity for Second year = 61,60,000 Cum Quantity for Third year = 61,60,000 Cum

Dredging on In-situ Basis by using any special dredging equipment viz., Grab/ Cutter/ Bucket/ Plough etc. with allied equipment’s 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, debries, steel plates, chains, wire ropes, cement bags, tarpaulins, etc. upto a depth of (-) 8.00 mCD at B.No. 1, and in front of B.No.1 upto 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 and 13 without damaging the existing structures, fenders etc., and dumping the dredged material at deeper areas away from berth face and the same shall be dredged/cleared simultaneously by TSHD and to be taken away by the dredging Contractor for reuse / recycling of dredged material generated out of SI.No.1, 2 & 4 of Part I of BOQ for 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. The bidders shall make their own arrangement for dumping area outside the Port limits for temporary storage of dredged material since NMP doesn’t have on shore dumping area in its premises. The responsibility of dumping of dredged material, storing at yard, treatment of the dredged material and subsequent disposal to prospective users will be the responsibility of the Dredging Contractor, cost including Mobilisation and De-mobilisation charges for Dredgers including Survey launch, routine boat and hire charges of all plant & equipment, cost of labour, materials and consumables etc., and transporting and dumping the dredged material in the designated dumping ground complete for the satisfactory completion of the Dredging work. Quantity for First year = 60,000 Cum Quantity for Second year = 60,000 Cum Quantity for Third year = 60,000 Cum

Diving charges to collect Sea bed samples

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 &3 from 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. Qty. for First year = 6200 Cum Qty. for Second year = 6200 Cum Qty. for Third year = 6200 Cum

PART-II:

Taking away of the dredged material by the dredging Contractor for reuse / recycling of dredged material generated out of SI.No.1, 2 & 4 of Part I of BOQ for 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. The bidders shall make their own arrangement for dumping area outside the Port limits for temporary storage of dredged material, since NMP doesn’t have on shore dumping area in its premises. The responsibility of dumping of dredged material, storing at yard, treatment if any of the dredged material, and subsequent disposal to prospective users will be the responsibility of the Dredging Contractor. In case the Dredging Contractor do not take away the dredged material for reuse / recycling and dump the dredged material in designated deep sea dumping area, the quoted amount for this item will still be deducted.