Trump's 250-Foot Arch Moves to Groundbreaking Without NCPC Approval

The Trump administration's announcement that it will begin excavation within two weeks for a 250-foot Great Triumphal Arch and Military Observation Deck near Washington, D.C.'s National Mall — despite lacking final approval from the National Capital Planning Commission (NCPC) and without completing federally mandated aviation safety and historic preservation reviews — represents a significant escalation in a long-running regulatory dispute. Interior Secretary Doug Burgum's September 3, 2026, social media post declaring that 'we are preparing to start, over the next two-week period, the excavation work necessary' for the structure, combined with the White House's September 4 statement that 'work will begin that does not require approval, but rather helps in the process,' sets up a direct confrontation over the scope of federal permitting obligations for construction on federal land in the National Capital Region. The administration is proceeding with physical ground-disturbing work at the same time that a lawsuit brought by veterans seeks to halt the project, and the NCPC — the congressionally chartered body with statutory authority over federal projects in the D.C. area — has not granted final approval. Two additional federally mandated reviews, one addressing aviation safety and one addressing historic preservation under what are effectively Section 106-type obligations, also remain incomplete. The White House's legal theory appears to be that excavation constitutes a preliminary, approval-exempt activity rather than construction itself. That characterization is central to the legal analysis because it frames the question of whether the administration can segment a project into 'non-approval' phases to avoid triggering statutory review requirements — a segmentation argument that courts have historically scrutinized under the Administrative Procedure Act and analogous environmental and preservation statutes. The absence of a completed aviation safety review is especially consequential given the arch's planned footprint near the National Mall, which sits within the airspace approach corridors for Reagan National Airport; a 250-foot vertical structure could implicate height restrictions designed to protect flight paths. Similarly, historic preservation experts have long argued that the project threatens the character of the National Mall historic district and that the administration has sought to weaken historic preservation protections altogether, a procedural posture that invites judicial inquiry into whether the agency acted with a predetermined outcome rather than genuine consideration. The ongoing veterans lawsuit adds another layer: the plaintiffs are likely to seek a preliminary injunction to stop excavation before it begins, and the administration's announcement that work is imminent is a deliberate attempt to create facts on the ground before a court can rule. Trump's own prior statement that the arch is 'for me' — later reframed by the administration as a tribute to the nation's 250th anniversary and the 'significance of Arlington Cemetery' — is precisely the kind of conflicting administrative rationale that courts examine when evaluating whether an agency action is arbitrary and capricious. The addition of the word 'Military' to the structure's title, which occurred without explanation even as NPR's questions went unanswered, further complicates the administrative record. Looking ahead, the two-week window is critical: if excavation begins before the NCPC acts or a court enters injunctive relief, the administration will have effectively constructed a non-trivial portion of the project under a legal theory that has not yet been tested. That could force the NCPC and reviewing courts into a reactive posture, adjudicating the legality of work already in progress rather than prospectively evaluating the project. The outcome will likely shape how future administrations approach mandatory approvals for landmark-adjacent federal construction, and whether segmentation of projects into 'preliminary' and 'final' phases can be used to circumvent statutory review thresholds. The case also tests the limits of executive-branch discretion over the National Capital Region's built environment, where Congress has historically asserted a distinct federal interest in preserving the symbolic and historic character of the capital. For regulatory attorneys and administrative law practitioners, the dispute is a live case study in how agencies attempt to manage statutory obligations they view as impediments — and how courts respond when the executive branch treats approval as a formality rather than a prerequisite.