Investing in the Future

Koa Ridge 46kV Overhead Line Relocation Project

Hawaiian Electric plans to relocate a portion of its existing 46kV overhead sub-transmission line, located in Koa Ridge, to allow the developer to build a community park as part of future residential development plans. The proposed work will involve moving infrastructure from an existing 46kV overhead pole line (shown in red) to an existing 138kV overhead pole line (shown in yellow).

Koa Ridge Project Map

The work will involve the removal of sixteen (16) structures and approximately 8,000 circuit feet of 46kV overhead conductors and 8,000 circuit feet of overhead shield wire conductor along the existing 46kV line (in red) and installing thirteen (13) new steel 138kV structures with 46kV underbuild (ranging from 85 ft-130 ft above ground height), three new steel 46kV poles (55 ft above ground height), 46kV overhead conductors and shield wire along the existing adjacent 138kV line. The new structures will be 35 ft-55 ft taller than the existing 138kV structures and will include the new 46kV conductors below the 138kV conductors.

Hawaiian Electric filed an application on July 11, 2022, with the Public Utilities Commission for approval to construct the 46 kV overhead line relocation. If approved by the PUC, construction will commence in October 2023 and be completed by December 2023.

The Public Utilities Commission has scheduled a public hearing to be held on Tuesday, October 11, 2022 at 6:30 pm at the Kanoelani Elementary School Cafeteria (94-7094 Oli Loop, Waipahu, Hawaii 96797). Those interested are invited to attend and state their views on the proposed overhead line relocation. To learn more, go to:, Docket #2022-0141. For any questions or comments, please email us.