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U.S. Army Corps of Engineers, City & County of Honolulu introduce Ala Wai Flood Risk Management study

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U.S. Army Corps of Engineers, City & County of Honolulu introduce Ala Wai Flood Risk Management study

HONOLULU (KITV4) - The U.S. Army Corps of Engineers (USACE), in partnership with the City and County of Honolulu, are scheduling a pair of virtual public workshops to gather input for the Ala Wai Flood Risk Management General Reevaluation Study.

The goal of this study is to identify a plan that will minimize potential flooding to communities within the Ala Wai watershed in a cost-effective, economically, justifiable, technically sound, and environmentally acceptable manner.

The virtual workshop is scheduled for Wednesday, November 10, from 5:30 PM to 8 PM, and on Saturday, November 13 from 1 PM to 3:30 PM.

“This effort is critically important as there is a high risk of a catastrophic flooding event from the Ala Wai Watershed, which would impact the health and safety of the people, infrastructure, and businesses in the area,” said Honolulu Mayor Rick Blangiardi.

A brief orientation to the Webex meeting platform will be offered 15 minutes prior to the start of each session.

Meetings will be recorded, and the content will be posted in Q&A format to the project website.

“The Corps of Engineers sees this study as an opportunity to evaluate all options, structural, non-structural, as well as nature-based features to reduce the impacts of flooding in the Ala Wai watershed,” said Commander Lt. Col Eric Marshall, USACE, Honolulu District.

There will be opportunities for the community to provide input throughout the study. This is the first round of community engagements as we begin this general reevaluation study.

The second round will discuss a more focused set of potential solutions under consideration at that stage; it is anticipated to occur during Summer 2022 prior to the release of the Draft Report.

The third round of meetings, currently slated for fall 2022, will discuss the Tentatively Selected Plan as presented in the Draft Report. The final round of meetings in 2023 will review the Recommended Plan prior to the release of the Final Report. The study will take no longer than three years and will follow a process similar to that of a USACE feasibility study.

Additional information regarding the study, the public meeting format, and what to expect during the meeting will be available at For questions regarding how to access the virtual meeting or to RSVP, contact

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