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100 Resilient Cities: Assessment of the Ala Wai Flood Mitigation Project

Flood mitigation is critical in Honolulu with approximate population of 65,000 residents and an additional 200,000 transient daily visitors

  • 265K

    Residents & Visitors

  • 300

    Structures At Risk

  • $400M

    Construction Value

  • Honolulu, Hawaii

    Honolulu, Hawaii

We worked with City officials to green a flood mitigation project to protect residents and the state’s tourism economic engine

An estimated 3,000 structures in Honolulu are at flood risk due to a one percent probable storm—a 100-year event—with potential damages exceeding $1 billion. The City and County of Honolulu (CCH), State of Hawaii, and the U.S. Army Corps of Engineers (USACE) Honolulu District are currently reviewing design features and negotiating terms of the partnership for the construction of the Ala Wai Watershed Flood Mitigation Project.

The City and County of Honolulu (CCH) retained Stantec on a pro-bono basis to review proposed USACE feasibility study level designs and provide general support services, including helping to identify opportunities for place-making and green infrastructure. Our team worked closely with the CCH Department of Design and Construction to produce multiple alternatives for the design and location of canal areas, walls and levees, and park areas. Our designs also considered the incorporation of ongoing complete streets planning alongside CCH goals for multi-modal transport. Concepts were provided for greening and increased safety for middle and upper watershed features. We also provided alternative conceptual designs to increase normal and higher frequency flood flows.

Our conceptual alternative designs and adjustments could reduce the risk to approximately 65,000 residents and an additional 200,000 transient daily visitors.

At a Glance

  • City and County of Honolulu
  • Rockefeller Foundation
Meet Our Team

Nancy Convard, Principal

Diverse technical experience in diverse environments and communities fosters solutions for strong, sustainable, and resilient communities.

John Malueg, Vice President, Manager of Resiliency Programs

We know disasters will happen—helping communities absorb and then rebound quickly is challenging yet imperative to advancing resilience.
John Malueg Vice President, Manager of Resiliency Programs Read More

John Menninger, Principal

Water shapes every facet of our world. Helping our community live with and connect to our water resources brings excitement to each day.

Nancy Convard


John Malueg

Vice President, Manager of Resiliency Programs

John Menninger


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