U.S. Department of Defense - Missile Defense Agency

U.S. Department of Defense - Missile Defense Agency

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Homeland Defense Radar - Hawaii


2021 Notice of Intent


A Notice of Intent was published in the Federal Register on February 26, 2021 announcing Missile Defense Agency’s (MDA) intent to prepare and Environmental Impact Statement (EIS) for the proposed Homeland Defense Radar – Hawaii (HDR-H).

2021 Scoping Process


MDA is engaged in Advanced Planning studies and preparing an EIS for the siting and development of the HDR-H, should a deployment decision be made and is funded.

MDA, in cooperation with the Department of the Air Force, Department of the Army, Department of the Navy, and the Federal Aviation Administration (FAA), is reopening the scoping period for the HDR-H Environmental Impact Statement (EIS), due to changes in the proposed alternatives. In 2018, the alternatives included Kuaokalā Ridge (KR) adjacent to the U.S. Air Force Ka‘ena Point Satellite Tracking Station and two alternative sites at the U.S. Army Kahuku Training Area (KTA) on O‘ahu. In 2020, MDA removed the U.S. Army KTA Site 2 and the KR alternatives from further consideration and added a new alternative at the U.S. Navy Pacific Missile Range Facility (PMRF) on the island of Kaua‘i.

The EIS analysis will include three alternatives: one on O‘ahu (KTA-1), one on Kaua‘i (PMRF) and a No Action Alternative. Should a deployment decision be made and is funded and if the HDR-H is constructed on O‘ahu, the U.S. Air Force Solar Observatory on O‘ahu would be relocated to the Air Force Research Laboratory Remote Maui Experiment site on Maui or to PMRF on Kaua‘i. The Proposed Action would also include establishment of restricted airspace for the HDR-H site.

This public scoping effort will supplement additional consultation under Section 106 of the National Historic Preservation Act of 1966 and its implementing regulations at 36 Code of Federal Regulations Part 800.

Due to recent Federal guidance on public gatherings, MDA held an Online Open House and Telephone Public Meetings, in place of in-person public meetings. The public was given the opportunity to ask questions of MDA representatives and provide verbal comments on the Proposed Action during Scoping Period as well as at the Telephone Public Meeting. To maximize participation, MDA provided two identical Telephone Public Meetings on March 23 and 25, 2021.

The Online Open House and public scoping comment period was February 26 – April 12, 2021. Scoping material is still available for download. Please check this website often for information on the upcoming Draft EIS release.

2021 Downloadable scoping resources: