A regulator across the Kallada river will hold back fresh water for Kollam city at a cost of ₹43.29 crore, and the Kallada river regulator tender closes at 5:00 PM on 5 November 2026.
A barrier built to protect a drinking water source
The Irrigation Department wants a regulator constructed across the Kallada river downstream of the Njankadavu bridge in Kunnathoor panchayat, to help supply drinking water to Kollam Corporation. It falls under Phase II of the AMRUT augmentation of the Kollam water supply scheme, reference IRR/IA/TR/442/2026_5_1_1/1, issued through the Superintending Engineer of the Irrigation South Circle at Thiruvananthapuram. The portal allows 540 days.
A regulator on a tidal coastal river does a specific job: it keeps saline water from pushing upstream into the intake during low flow, so the city can keep drawing fresh water through the dry months. That is why a water supply scheme is paying for a structure the irrigation department will build.
In river construction on a short clock
The estimate is ₹43,29,21,939. The deposit is unusually light at ₹5,00,000 with exemption allowed, because Kerala caps bid security rather than scaling it with value, so do not read the small figure as a small job. The document fee is ₹19,518, the form of contract is item wise, and bids open at 11:00 AM on 7 November.
The binding constraint is the river itself. Foundation work has to be finished inside the dry window between monsoons, with cofferdams and dewatering running the whole time, and the 540 days have to be planned around that season rather than spread evenly across it.
River structures need machines that can stand wet work and reach from the bank. Long reach excavators dig the foundation and place rock from outside the channel, and a piling rig goes in if the design calls for piles. A crane handles shutters, gates and the lifting arrangement, which on a regulator is mechanical work as much as civil. Transit mixers keep the pours continuous, because a joint in the wrong place on a water retaining structure is a leak for the next fifty years. Pumps for dewatering are as important as any earthmover here. A backhoe loader covers approaches and the protection works.
Key facts
Tender ID
2026_Irrig_882556_1
Reference no.
IRR/IA/TR/442/2026_5_1_1/1
Issuing authority
Kerala Irrigation Department, Chief Engineer (Irrigation and Administration), through SE Irrigation South Circle, Thiruvananthapuram
Location
Across the Kallada river downstream of Njankadavu bridge, Kunnathoor panchayat, Kollam district, Kerala
Search by tender ID 2026_Irrig_882556_1 (reference no. IRR/IA/TR/442/2026_5_1_1/1) under the Kerala Irrigation Department.
Register on the portal and keep a valid Class III digital signature certificate ready.
Download the bid document and the regulator drawings, then check eligibility, the ₹5,00,000 EMD and the ₹19,518 fee. Confirm the working season assumed in the programme.
Submit your bid online before 5 November 2026, 5:00 PM.
Construction of a regulator across the Kallada river downstream of the Njankadavu bridge in Kunnathoor panchayat, to facilitate drinking water supply to Kollam Corporation under Phase II of the AMRUT Kollam water supply augmentation.
What is the estimated value?
₹43.29 crore, shown on the portal as ₹43,29,21,939.
Why is the EMD only ₹5,00,000?
Kerala caps bid security rather than setting it as a percentage of value, and exemption is allowed on this tender. The low deposit does not reflect the size of the work.
When do bids close?
At 5:00 PM on 5 November 2026, with opening at 11:00 AM on 7 November 2026. The work period is 540 days.
Tender details are summarised for convenience and may change. Always verify the latest dates, terms and documents on the official tendering portal before bidding. DesiMachines is not responsible for changes made by the issuing authority.
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