A major rehabilitation of Nairobi Dam is set to begin immediately after a high-level assessment led by Governor Sakaja Johnson alongside key agencies, including the Water Resources Authority, Nairobi Rivers Commission and the Nairobi City Water and Sewerage Company.

Speaking at the site, Sakaja outlined a three-pronged emergency plan to stabilize the aging dam and avert potential disaster.

“The first is clearing obstructions downstream of the spillway to allow water to flow naturally and reduce pressure on the dam walls, which have shown signs of breaches. The second is testing the strength of the embankment through geotechnical surveys to ensure structural integrity. The third is enforcing a 30-metre buffer zone around the dam to protect both the public and the infrastructure,” Sakaja confirmed.

The Governor noted that Nairobi Dam, constructed in 1953, was originally designed for both recreation and flood control along the Ngong River. However, decades of pollution, sewage discharge, encroachment and informal settlements have significantly compromised its safety and effectiveness.

Public participation forums are scheduled to begin Tuesday in Nairobi West and continue Wednesday in Highrise Ward, targeting residents living near the dam. Authorities are seeking community input as part of the recovery process.

Sakaja revealed that two options had been considered decommissioning the dam or fully rehabilitating it but experts have backed restoration.

“At this stage, we are choosing full rehabilitation. Decommissioning would multiply flood risks for downstream areas,” he said.

He added that preliminary studies by the Water Resources Authority support the rehabilitation approach, expressing confidence that restoration is achievable despite years of human interference.

“Yes, human interference over decades has caused challenges, but restoration is possible. We are committed to doing this carefully and responsibly.” He continued

Rehabilitation works are expected to commence immediately, with short-term interventions beginning as early as Tuesday, in a bid to restore the dam’s critical flood control function and safeguard surrounding communities.