This bill amends the 1954 statute that defines Gateway Arch National Park’s legal boundary, replacing the current map citation and adjusting the park’s footprint. The change in statutory language modifies how the park’s perimeter is described in federal law.
Why it matters: a statutory boundary, however modest, changes which parcels can be managed as parkland, affects applicable federal authorities, and sets the baseline for any future land acquisition or management actions. Even small acreage adjustments can create or resolve legal and operational questions for the National Park Service, local governments, and property owners.
At a Glance
What It Does
The bill amends Section 4(a) of the Act of May 17, 1954 to revise the statutory description of Gateway Arch National Park by updating the cited map and altering the park’s enumerated acreage. It does not include separate language authorizing land acquisition or appropriations.
Who It Affects
Primary actors affected are the National Park Service (NPS), owners of parcels near the park boundary, St. Louis municipal and county planning and tax authorities, and tourism and preservation stakeholders that operate on or adjacent to the park.
Why It Matters
Statutory boundaries determine federal jurisdiction and guide management, planning, and legal disputes. Updating a map citation and acreage can clear up ambiguity about the park edge, but it also shifts the starting point for acquisition, law enforcement, and property-rights questions.
More articles like this one.
A weekly email with all the latest developments on this topic.
What This Bill Actually Does
The bill makes a targeted statutory change to Gateway Arch National Park’s enabling statute. It amends the paragraph that defines the park’s boundary by replacing the older map reference with a new map and adjusting the acreage listed in the statute.
Because the legal description in federal law points to a specific map and an acreage figure, this amendment changes the officially recognized perimeter of the park.
The text directly substitutes the existing map citation and acreage number in Section 4(a) of the Act of May 17, 1954 (codified at 16 U.S.C. 450jj–3(a)). The new map is identified by title, number, and date; the revised acreage is stated with a higher degree of precision.
The bill does not itself direct the federal government to purchase land, transfer ownership, or appropriate funds; it simply modifies the statutory description that governs the park’s limits.Practically, the amendment has two immediate consequences. If the parcels inside the revised boundary are already federally owned, the change brings them explicitly under the park’s legal perimeter and management authorities.
If the parcels are privately owned or held by state/local entities, the revised boundary creates the legal basis for future transfer or acquisition, subject to separate agreements, appropriations, or statutory authority. The updated map citation also reduces reliance on an older, potentially outdated map and creates a clearer documentary record for resolving disputes over the park edge.
The Five Things You Need to Know
The bill amends Section 4(a) of the Act of May 17, 1954 (16 U.S.C. 450jj–3(a)), the statutory provision that defines Gateway Arch National Park’s boundary.
It changes the statute’s stated park acreage to 102.18 acres (replacing the prior reference to 100 acres).
The bill replaces the existing map citation with a new official map: 'Gateway Arch National Park Proposed Boundary Revision', numbered 366/189,627, dated August 2023.
The language only revises the statutory boundary and map reference; it does not authorize land acquisition, transfer, condemnation, or provide appropriations.
By updating the statutory map reference and acreage, the bill establishes the legal baseline the NPS would use for management, planning, and any subsequent property transactions.
Section-by-Section Breakdown
Every bill we cover gets an analysis of its key sections.
Short title
Provides the Act’s short name: the 'Gateway Arch National Park Boundary Revision Act of 2026.' This is purely stylistic but is the label by which implementing documents and references will cite the change.
Precision increase to statutory acreage
Amends the statutory text that previously referred to 'one hundred acres' by inserting a more precise figure: 102.18 acres. That numeric change alters the statute’s stated size of the park; because acreage is part of the legal description, the change can affect which parcels are considered inside the park boundary absent other controlling evidence. The precision suggests a recent survey or boundary study underlies the amendment, which can reduce future litigation over vague acreage figures.
Supplants old map citation with a new official map
Strikes the prior map language (which referenced a map dated January 1992) and inserts a new map citation by title, map number, and date (August 2023). The statutory reference to a specific map anchors the legal boundary to that document; upon enactment, the August 2023 map becomes the controlling exhibit for the park’s perimeter. Practically, that centralizes any boundary disputes on a single, modernized map, but it also shifts legal focus to the content and accuracy of the new map.
This bill is one of many.
Codify tracks hundreds of bills on Environment across all five countries.
Explore Environment in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- National Park Service — gains a clarified statutory boundary and a modern map reference, which simplifies planning, signage, and enforcement within the newly defined perimeter.
- Historic preservation and conservation organizations — benefit from the potential for additional federal protection of culturally or environmentally significant parcels that fall inside the revised boundary.
- Park visitors and local tourism businesses — stand to gain if revised boundaries allow the NPS to manage or develop small new areas for public access, interpretation, or visitor services.
- City and regional planners — obtain a clearer legal baseline for coordinating infrastructure, transportation, and public-space planning around the park.
Who Bears the Cost
- Private landowners inside the newly defined boundary — face uncertainty about future restrictions, loss of development options, or pressure to sell if their parcels are now depicted within a national park boundary.
- Local taxing authorities — could lose tax base if federal acquisition of parcels occurs, shifting property off municipal rolls, and thereby reducing local revenues.
- National Park Service and Congress — may incur future costs for acquisition, transfer, maintenance, and enforcement of the additional acreage even though the bill does not allocate funding.
- Developers and adjacent property interests — may face new constraints or additional permitting scrutiny if properties are effectively brought under federal oversight or if coordination with the NPS becomes necessary.
Key Issues
The Core Tension
The central dilemma is between clarifying and expanding federal protection for park resources (and the operational benefits that brings) versus the rights and fiscal interests of private owners and local governments: the bill establishes a federal perimeter without resolving how or whether privately held land inside that perimeter will become federally owned or managed.
The bill is narrowly focused on the statutory description; it does not address acquisition mechanics, funding, or timelines. That creates a practical implementation gap: changing the legal boundary in statute establishes a claim to those lands as park perimeter but does not convert privately held parcels into federally owned parkland.
Any transfer of title, easements, or compensable taking would need separate action — voluntary conveyance, local-to-federal transfer, or appropriation and purchase authority — each with its own legal and fiscal requirements.
Another unresolved issue is the legal weight of the map label 'Proposed' in the new map title. Once the statute cites the map, the document becomes the legal reference regardless of internal nomenclature; however, parties may litigate whether the map accurately reflects intended parcels or whether further surveying and deed-level descriptions are necessary.
Finally, the acreage increase is small in absolute terms but could involve strategically important parcels (access points, riverfront land, or historic resources). That raises trade-offs between preserving contiguous park management and respecting local property rights and tax structures, and it exposes the NPS and Congress to future budgetary decisions if acquisition or management costs follow enactment.
Try it yourself.
Ask a question in plain English, or pick a topic below. Results in seconds.