Hangar One, a historic structure at Moffett Federal Airfield in California, has undergone a comprehensive restoration, culminating in December 2025. This project, led by Planetary Ventures, focused on modernizing the hangar while adhering to its original visual characteristics.
Constructed in 1933 for the USS Macon airship, Hangar One has a remarkable size, measuring approximately 1,133 feet long, 308 feet wide, and 198 feet high. The restoration was executed according to the U.S. Secretary of the Interior’s Standards for Rehabilitation of historical buildings, ensuring that the integrity of this landmark was preserved.
Historical Context and Contamination Issues
The restoration process was necessitated by significant contamination issues. In 1997, NASA discovered toxic substances, including polychlorinated biphenyls (PCBs), in the hangar’s storm drain settling basin. Subsequent investigations revealed that the hangar’s original composite corrugated siding was the source of these contaminants, leading to its closure in 2003 under the Toxic Substances Control Act.
In 2010, the Navy initiated actions to address the contamination, which included removing the hangar’s roof and siding, and sealing the structural frame with epoxy to mitigate health risks. These actions laid the groundwork for the eventual restoration.
Restoration Process and Structural Upgrades
In 2014, NASA signed a lease with Planetary Ventures to rehabilitate Hangar One. The restoration efforts began in earnest in 2022, with the removal of remaining toxic materials. This involved encasing sections of the hangar with scaffolding to contain contaminants during removal. After the cleanup, the steel frame was primed and repainted to protect it from environmental damage.
In addition to remediation, the restoration included various structural upgrades, as well as enhancements to mechanical, plumbing, electrical, and landscaping systems. These improvements are designed to ensure the hangar’s operational integrity for future generations.
Significance and Recognition
Hangar One is not only a vital part of California’s aviation history but is also recognized on the National Register of Historic Places. It holds significance for its contributions to coastal defense and naval technology, as well as its distinctive architectural style. The structure is designated as a Naval Historical Monument and a California Historic Civil Engineering Landmark.
The completion of Hangar One’s restoration marks a significant milestone in preserving a piece of aviation history while ensuring its functionality for years to come.
This article was produced by NeonPulse.today using human and AI-assisted editorial processes, based on publicly available information. Content may be edited for clarity and style.
