New Saipan radar to support growing Indo‑Pacific defense network
By Bryan Manabat
Saipan—A new radar facility proposed for Mount Petosukara would restore long‑range surveillance in Saipan’s northern airspace, replacing the rusting remains of the former Pacific Barrier III site.
The public comment period for the project has now been completed and the Federal Aviation Administration is preparing to review all submissions before issuing its final NEPA decision.
The FAA, working in cooperation with the U.S. Air Force, proposes to install and operate a modern air route surveillance radar on Saipan to close a long‑recognized gap in north‑facing radar coverage.
The facility would be built atop Mount Petosukara in the Tangke area near As Matuis, within the previously developed footprint of the former Pacific Barrier III installation.
Although the project is framed as an upgrade to the National Airspace System, the radar proposal also aligns with a broader U.S. military buildup across the Marianas.
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On Guam, the Pentagon plans to build a missile defense system and expand airfield capacity and Marine Corps basing, while Tinian and Rota continue to host periodic Air Force and Navy training activities tied to Indo‑Pacific operations.
The proposed Saipan radar would strengthen regional surveillance, supporting both civilian air traffic management and defense readiness across the archipelago.
According to the FAA, the project is needed to provide reliable long‑range radar surveillance for the National Airspace System and to support national defense operations.
Current radar limitations in the CNMI hinder efficient air traffic management and leave a critical gap in regional surveillance, particularly in the northern approaches—an area increasingly important as the Marianas take on expanded strategic roles.
The draft environmental assessment evaluates the environmental impacts of constructing and operating a permanent radar installation at the site.
The proposal includes a radar service building with an integrated radome and radar array, upgrades to roughly 1.6 miles of electrical distribution infrastructure, and improvements to access, utilities, and security.
The project also calls for demolishing deteriorated Pacific Barrier III structures and temporarily installing a mobile radar unit during construction to maintain coverage.
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FAA officials said Mount Petosukara’s elevation and unobstructed line of sight make it uniquely suited for long‑range radar operations. Building within the previously disturbed facility avoids impacts to surrounding native forest communities, they added.
The draft environmental assessment also analyzes reasonable alternatives, including a No Action Alternative. The FAA said the 30‑day public comment period opened on Aug. 17 and closed on Sept. 15. The agency will now review all comments and determine the appropriate NEPA decision before preparing the final environmental document.
The agency also announced that consultation under Section 106 of the National Historic Preservation Act has been completed.
On June 16, the CNMI Historic Preservation Office concurred with the FAA’s finding of “no adverse effect” on historic properties. Archaeological monitoring will be required during all ground‑disturbing work.
As the Marianas region continues to absorb new military infrastructure—from Guam’s missile defense systems to Tinian’s expanding role in contingency training—the Mount Petosukara radar proposal represents another component of the region’s evolving surveillance and operational network.
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