KARIKAN DHATA NAGAR PANCHAYAT WATER SUPPLY SCHEME UNDER AMRUT 2.0 PROGRAMME

Construction of OHT: Design, Submission of vetted design and drawing from IIT, Supply of all materials, labour, T&P etc. required for construction of INTZ type RCC Overhead Tank with minimum freeboard of 15 cm including Ventilator and Water Level Indicator, Lightning Conductor, C.I. D/F Vertical Pipes (Inlet Pipe-2 No, Outlet Pipe-2 No, Overflow Pipe-1 No & Washout Pipe-1 No), Duck Foot Bend, Puddle Collars and Bell Mouths, DI/D/F Sluice Valves with actuartors on Inlet, Outlet & Washout Pipes and Sluice Valve Chambers, Bypass Arrangement of OHT, Flooring with Apron & Drain (minimum 100 mm thick PCC of 1:2:4 & 100 mm thick RCC of 1:1.5:3 with nominal reinforcement), the construction of a 30x30 cm cement concrete (CC) drain with an internal wall thickness of 100 mm, over a 60 cm wide plain cement concrete (PCC) base of 100 mm thickness in 1:2:4 mix, for rain water disposal of campus, shall be carried out for a minimum length of 100 meters along the boundary wall of the campus up to the disposal point, Floor Level shall be 60 cm above the Finished Ground Level of Campus including supply of earth to fill the whole campus according to the formation level(floor) of OHT, Three Coats of Apex Painting(Painting through spray is prohibited) over One Coat Primer of Approved Colour after Finishing of RCC Surface with Grinder, Repair of Pinholes, Unevenness, supply and fixing of two number 60 Watt solar light system (with dry battery) at the height of second brace of the OHT near stair case and main gate, Railings – G.I. Pipe Railing around Staircase (both sides), Balcony & Top Dome Periphery, S.S. Ladder from Opening of Top Dome to Bottom Dome, Staircase (Separate Two-Column Based RCC Staircase including Escape Channel of 20 m Length, Box-Type Enclosure at the Entrance of the Staircase having Locking Arrangements, and 1.20 m Wide Balcony), Food Grade Epoxy Coating on Inside Surface Area of Water Container after Successful Testing for Water Tightness as specified on the page No.- 194 of Tender Document for Following Capacity and Staging mentioned as per BOQ. For bidding purposes, the bearing capacity of soil shall be considered as 8 t/sq.m. Working design shall be based on the SBC determined (The depth of bore hole shall be two times of proposed dia meter raft foundation of OHT) after soil investigation / 8 tonne/sq.m. The depth of foundation is minimum 2.50 m from existing ground level on raft foundation or pile-cum-raft foundation or at more depth based on the design of the tank, for which no extra claim shall be entertained. The height of columns shall be desided by considering the natural ground level and formation level of floor of OHT. The staging shall be accounted between floor level to bottom ring beam. Note: The bid price of Overhead Tanks is to be submitted considering net safe allowable bearing capacity as 8 t/m², keeping the minimum foundation depth to be 2.5 m below the existing ground level at the site of work. The successful bidder will be required to investigate the soil bearing capacity. If net safe allowable bearing capacity is found to be equivalent to or more than 8 t/m², the design of OHT will be based on 8 t/m² capacity. However, in case the net safe allowable bearing capacity is found to be below 8 t/m², then the design of OHT will be based on the actual bearing capacity, adopting raft foundation or raft-cum-pile foundation.

For Zone II - Capacity - 1250 KL Staging -25m a. C.I D/f pipe inlet - 2nos of 400 mm dia b. C.I D/f pipe outlet - 2nos of 450mm dia c. C.I D/f pipe overflow - 2nos of 300mm dia d. C.I D/f pipe washout - 1nos of 200mm dia

Construction of CWR: Design, soil investigation, submission of IIT-vetted structural designs and drawings, supply of all materials, labour, tools & plants (T&P), and construction of Clear Water Reservoir (CWR) cum Pumping Station of required capacity including freeboard, as per approved drawings, IS specifications, and directions of the Engineer-in-Charge. The work includes site clearance and development, excavation to required level, bed preparation, construction, refilling and compaction; fixing of inlet, outlet, overflow, washout and other pipes of suitable sizes; stainless steel manhole covers with locking arrangement, ventilators, and suction level indicator; drainage arrangement for complete emptying of CWR for cleaning, repair and maintenance; RCC staircase from top slab to raft foundation/bottom with SS-316 handrails on both sides. Application of food-grade epoxy coating on internal surfaces shall be done after successful water-tightness testing. Provision shall be made for gantry beams or gantry slabs with adequate height and clear space above the gantry, to be finalized during the design of the pumping station. The minimum height of the pumping station shall not be less than 6.5 metres. A rolling shutter shall be provided for the smaller span of the pumping station, and a main gate shall be provided at the longer span.The top surface (roof) of the Clear Water Reservoir, as well as the roof surface of the pumping station, shall be finished with 40 mm thick Kota stone flooring. Provision shall be made for laying electric cables from the motor to the starter in trenches provided within the RCC slab of the Clear Water Reservoir. Open trenches shall be covered with MS chequered plates. During structural design, it shall be ensured that all cables, PVC pipes, and any other electrical or mechanical arrangements required for installation are accommodated within the trenches, without obstructing the floor or other structural elements. The pumping station size shall be decided based on the number of pumping plants, keeping space for a control cabin of minimum 3 m width with uPVC & glass panels, required furniture, and one air-conditioner for SCADA installation. A minimum 3 m × 3 m verandah on 400 mm dia RCC columns shall be provided at the entrance of the pumping station. Provision of two 60-W solar lights with dry battery shall also be made. The external surface of the Clear Water Reservoir up to the ground level shall be painted with bituminous epoxy coating with a minimum thickness of 1000 micron. For bidding purposes, the Safe Bearing Capacity (SBC) of soil shall be considered as 8 t/sq.m. Working design shall be based on SBC obtained from soil investigation or 8 t/sq.m, whichever is lower. Depth of borehole shall be twice the proposed diameter of raft foundation. Minimum foundation depth shall be based on structural design. The clear height of CWR from formation level of the campus shall be minimum 60 cm. on raft or pile-cum-raft foundation, or deeper as per design, with no extra claim on this account. All works complete.

Zone II- 425 KL

Construction of Pump Houses

Design, soil investigation, submission of vetted structural designs and drawings, supply of all materials, labour, Provide all materials, labour, T&P etc. complete for construction of Pump House size 3.6 x 3.0 x 3.0 m, Chlorinating Room size 1.8 x 2.5 x 3.0 m as per type design and specifications provided in the tender document. The structure will be RCC frame structure providing separate beams at plinth and lintel level. The reinforcement of RCC base slab of the by-pass chamber will be connected with the plinth beam to ensure its stability. There is no fixed minimum depth criterion for the foundation of the pump house. The depth of foundation shall be decided based on firm soil at the time of structural design. Column footings shall extend from the natural ground level down to the formation level of the pump house, as determined by the Engineer-in-Charge, ensuring adequate support and stability. A minimum 230 mm thick brick wall shall be constructed from the footings up to the formation level of the pump house. The column footings shall be left empty and shall not be filled with the earth. The parapet wall above the pump house shall be a minimum of 60 cm high, constructed with 230 mm thick brickwork. For installing the pumping plant, MS girders shall be provided above the pump house, supported on a minimum 450 mm thick brick wall of 1.5 m height. The I-sections shall be properly cast in concrete to ensure structural stability. An MS door of size 1.5 m × 2.1 m height shall be provided. Grills (Fabricated with 10mm square bars) shall be provided on the outside of all windows and ventilators. MS windows shall be designed to open inward into the pump house. The minimum thickness of MS sheet used for the main door and window panels shall be 3 mm. The floor of the Pump House shall be constructed by providing 300 mm sand filling over compacted earth and thereafter 100 mm thick 1:2:4 PCC and 100 mm thick RCC with minimum reinforcement. The floor of the pump house shall be finished with 40 mm thick Kota stone. An RCC staircase, supported on the raft foundation, shall be provided from the formation level up to the floor level of the pump house. The staircase shall also be finished with Kota stone. The V-notch of 6 mm thick MS plate shall be fixed in RCC top beam of 230 mm thickness. The apron shall be constructed with a protection brick wall of 230 mm width & 600 mm thickness, including 100 mm thick RCC with minimum reinforcement over PCC. The extrnal surface of pump house shall be finished with two coats of Asian Apex Ultima exterior paint over one coat of primer. The preperation base surface shall be done with birla wall plast. Painting through spray is prohibited. The top roof slab shall be treated with brick coba using appropriate waterproofing chemicals. The vertical rainwater pipes shall be fixed using minimum 100 mm dia PVC pipes of 8 kg/cm². All works shall be completed to the satisfaction of the Engineer-in-Charge

Provide all materials, labour, T&P etc. complete and construct Pump house size (3.6x3.0x3.0x3.0)m Chlorinating room size (1.80x2.50x3.0)m as per departmental type design for Tube Well.

RENOVATION OF EXISTING STRUCTURE (OHT OF 650 KL/20M STAGING, BOUNDARY WALL & PUMP HOUSES)

Scaffolding: Providing and fixing double scaffolding system (cup lock type) on the exterior side, up to seven-storey height, made with 40 mm dia M.S. tubes at 1.5 m centre to centre, horizontal & vertical tubes joined with cup & lock system with M.S. tubes, M.S. tube challies, M.S. clamps, and M.S. staircase system in the scaffolding for working platform etc., and maintaining it in a serviceable condition for the required duration as approved and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connections with the building etc. wherever required for inspection of work at required locations with essential safety features for the workmen etc., complete as per directions and approval of the Engineer-in-Charge. The elevational area of the scaffolding shall be measured for payment purposes. The payment will be made once irrespective of the duration of scaffolding. Note: This item is to be used for maintenance work judicially; necessary deduction for scaffolding in the existing item is to be done.