Construction Updates

Flood water at entry gate to the Kaneohe Wastewater Pretreatment Facility

Rainstorms this past weekend overburdened Windward Oahu’s wastewater collection system. As related to the Kaneohe/Kailua Tunnel Project, the storm resulted in a wastewater spill at the Kaneohe Wastewater Pretreatment Facility (KWPTF) where contractors are working on the tunnel project. The actual spill volume is still being calculated.
The storm resulted in severe flooding and some areas of the KWPTF were under three feet of stormwater, resulting in equipment damage.



Flood water at the Kaneohe Wastewater Pretreatment Facility

The flooding damage is still being assessed and construction has been impacted. A setback like this could impact the Global Consent Decree deadline of June 30, 2018. Prior to this storm event, the City was on track to meet the deadline.


On a sunnier note, when the Kaneohe/Kailua Tunnel Project is complete, it will drastically reduce the likelihood of spills at the KWPTF where peak wastewater flows (common during storms) have at times overburdened the pump station resulting in wastewater spills. The Kaneohe/Kailua Tunnel Project will effectively eliminate the need for pumps at the KWPTF because the tunnel will transport wastewater using gravity. The tunnel itself is designed with a storage capacity in excess of peak wastewater flows and will provide wet weather surge storage in the system which will help avoid future spills.


We will continue to keep you informed; however, if you have any questions or concerns, please feel free to contact the Construction Management Team via the 24-hour project hotline at (808) 445-9079 or email


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