News Releases

U.S. Army Corps of Engineers proceeding with design modifications to Ala Wai system

Published Sept. 27, 2019

FORT SHAFTER, Hawaii (Sept. 27, 2019) -- Over the past year, the U.S. Army Corps of Engineers (USACE) has been updating data and engaging in the community to gather feedback as part of the Corps design processes for the Ala Wai Watershed Flood Risk Management system.

Based on updated data and community engagements for the Ala Wai project, certain flood mitigation system changes are being recommended. The project team will modify the flood protection system to maximize the level of protection to the community, infrastructure, and economy within the authorized funding amount of $345 million.

Community engagement and feedback has been critical throughout the initial stages of the project, and we are committed to continuing relationships with the public and stakeholders. Our project team will coordinate small and large audience engagements within the community to collaborate on project system modifications.

Recommendations include altering features in the Upper Manoa Valley and removing features in the Upper Makiki and Palolo Valleys where private property was impacted. There are also recommendations to explore modifications to the system in the lower watershed around the Ala Wai Canal, such as extending barriers up to Date Street, and where space allows using earthen berms in lieu of walls.

Future public engagements will be scheduled with community leaders, stakeholders, organizations, and neighborhood boards. Public meeting details will be posted through local media forums and on social media.

Please visit our website at for more information regarding upcoming public involvement opportunities. Questions on the project can be emailed to:

Release no. 19-034