ECONOMYNEXT — Sri Lanka’s cabinet has approved a revised plan to implement the remaining work of the Kolonnawa Stormwater Drainage and Environmental Improvement Project over three years at an estimated cost of 15,077.82 million rupees.
The Cabinet of Ministers approved the proposal presented by the Minister of Transport, Highways, and Urban Development to revive the stalled flood-mitigation scheme.
The project originally began several years ago to manage severe rainwater drainage in the area, but work suffered long disruptions.
“Although construction work commenced in 2019, the implementation of its components as originally planned was hindered by the COVID-19 pandemic in 2020 and the subsequent economic crisis,” the cabinet paper stated.
Following these setbacks, authorities prepared a fresh project plan and an updated cost estimate to carry out the remaining tasks across several core components.
Under the new plan, the government will complete ongoing construction on the 3,250-metre Salalihini Mawatha canal and build the 3,868-metre Dahamwela canal. It will also execute specialized tasks, including the construction of dedicated water retention ponds.
Work will also focus on upgrading existing waterways to improve water flow during heavy rainfall.
This includes rehabilitating the 4,475-metre Passanna Canal and the 650-metre Dandu Thota Canal, as well as repairing the Dandu Thota sluice gate. Authorities will also install three mobile pumps, each capable of pumping one cubic metre of rainwater per second.
In addition to physical civil works, the project allocates dedicated funding for social support and property takeover.
The plan covers the “acquisition of essential land plots within the project area, and the implementation of a compensation and relief package—estimated at 1,015 million rupees—for affected families, taking into account the potential impact on their daily livelihoods,” the cabinet note said.
The compensation package aims to protect residents whose daily income could be impacted while the three-year drainage improvement moves forward. (Colombo/Oct20/2026)