Arlington County sues to block Trump's triumphal arch, citing safety and environmental failures

Arlington County, Virginia, filed a federal lawsuit Thursday to halt construction of President Donald Trump's proposed 250-foot triumphal arch at Memorial Circle — becoming the first government body to challenge the project in court, and escalating a legal fight that has so far been led by veterans and preservationists.

Named as defendants in the Eastern District of Virginia filing are the Department of the Interior, Secretary Doug Burgum, the National Park Service, and acting NPS Director Jessica Bowron. It is brought on behalf of the county by legal advocacy group Democracy Forward.

Central to the lawsuit is an allegation that the National Park Service cut short its environmental review process, substituting an insufficient assessment for the full examination required under the National Environmental Policy Act. The county argues the agency failed to properly weigh the arch's effects on traffic, emergency transportation routes, air quality, noise levels, flight paths near Reagan National Airport, and historic sightlines between the Lincoln Memorial and Arlington National Cemetery.

The National Park Service, the agency responsible for projects on national park land such as Memorial Circle, is proceeding full-speed toward ground-disturbing construction. Although the agency has claimed that a final decision to construct the Arch has not yet been made and purports to be engaged in a routine decisional process, that rushed process appears to be a pretext designed to shore up justifications for building the Arch in accordance with the President's repeated marching orders.— Arlington County Board, via lawsuit filing

The lawsuit asks a court to halt what it calls "the agency's feverish pace toward construction" until legally required analysis and testing are completed.

The Arlington County Board has filed this lawsuit because our community has the most to lose from this egregious and unlawful proposed project.— Matt de Ferranti, Arlington County Board Chair

The county's attorneys spell out specific safety fears in the filing. Among them: the arch's proposed military uses — storing ammunition, staging drones, and positioning snipers — in a location surrounded by commuters and tourists.

Using the Arch to store large stockpiles of ammunition and as a staging point for drones and snipers, so close to commuters and tourists, will dramatically worsen these public-safety harms and the risk of accidents.— Arlington County attorneys, via lawsuit filing

The filing also raises a concern about historic symbolism. County attorneys contend the arch would block the visual corridor between the Lincoln Memorial and Arlington National Cemetery — a sight line intentionally laid out to symbolize the country's reunification following the Civil War.

The Arch will … directly obstruct the line of sight between the Lincoln Memorial and Arlington National Cemetery that was deliberately created to symbolize the nation's post-Civil War reunification.— Arlington County attorneys, via lawsuit filing

Federal parkland west of the Potomac River, immediately adjacent to Arlington County, is where Memorial Circle is located. Trump has said he wants the structure — which would surpass every existing triumphal arch in height, standing taller even than the Lincoln Memorial — finished in time for the nation's 250th birthday. The U.S. Commission of Fine Arts, every member of which was appointed by Trump, gave the arch's design its approval. The NPS has also supported the proposed location, though its own review found the monument would have 'adverse effects' on several historic sites and Washington's skyline, according to The Independent.

Arlington's lawsuit is not the first legal challenge to the arch. A group of Vietnam War veterans filed suits in February and September raising concerns about obstructed sightlines and cultural significance. A judge in that Washington, D.C., case ordered the administration to give the court 48 hours' notice before undertaking any activities related to or in preparation for construction. The county's action, however, marks the first time a government entity has entered the legal fight.

One day before the lawsuit was filed, Association of Flight Attendants-CWA President Sara Nelson went public with concerns that the arch adds to safety problems she said remained unresolved following a deadly January 2025 crash over the Potomac River that killed 67 people, according to ABC News. Nelson also took issue with Trump's plan to transform the arch into what she described as "a top grade military complex."

At a time when millions of Americans are struggling to make ends meet, we don't need vanity projects. This project will do significant harm to the people of Arlington County.— Skye Perryman, President and CEO, Democracy Forward

The arch is part of Trump's broader "Make D.C. Safe and Beautiful Again" initiative, which has also included renovations to the Lincoln Memorial Reflecting Pool, changes to the White House Rose Garden, and an ongoing legal dispute over plans for the Kennedy Center, according to The Independent. The White House and Interior Department had not responded to requests for comment at the time of publication.

Why it matters — Arlington County's lawsuit is the first by a government body against the arch and could force a legal pause on construction by requiring the federal government to complete a full environmental review — a process that, if ordered by a court, would significantly delay or reshape a project Trump has tied to the nation's 250th anniversary.

Reported by thehill.com, abcnews.com, reuters.com, independent.co.uk