Hawaii seizes control of crumbling Wahiawa Dam in $26M safety push
Hawaii is taking over Wahiawa Dam from Dole Food Co. to address urgent safety concerns. The state has allocated $26 million for the transfer and initial repairs, with further funding likely needed. Officials warn the dam's poor condition poses risks of failure during extreme flooding.
The 103-year-old structure, including its reservoir and irrigation network, will shift to state control under the Department of Land and Natural Resources (DLNR). The move follows years of deferred maintenance and rising repair costs now exceeding $50 million. Dole Food Co. has agreed to hand over ownership of Wahiawa Reservoir—also known as Lake Wilson—along with the dam and its 30-mile irrigation system. The transfer will see the property move from Dole to the Agribusiness Development Corporation, then to the Department of Agriculture, before DLNR takes charge of safety upgrades.
The dam's 183-foot-wide spillway, last rebuilt in 1921, is a major concern. DLNR classifies its integrity as uncertain, with risks of compromise during heavy rain. Plans include replacing the spillway with a more efficient design, estimated to cost $25 million. Additional work—such as wall repairs, slope stabilisation, and a debris boom—is set for completion by early 2029.
Historically, the dam supplied 30 million gallons of water daily to Oahu's farms, though its current economic impact remains unquantified. While critical for agriculture and water security, the structure's deficiencies have forced the state to act. Recent near-failures and escalating repair costs, now over double the initial $20 million estimate, have shifted the financial burden to taxpayers.
The state has so far allocated $5 million for the property acquisition and $21 million for rehabilitation. Officials are pursuing extra funds to cover potential cost overruns as work progresses. The takeover marks a turning point for Wahiawa Dam, which has long supported local farming but now demands urgent intervention. With repairs stretching into 2029, the project aims to secure water supplies, protect public safety, and stabilise a structure deemed at risk of failure. The final price tag, however, remains uncertain as costs continue to climb.
