H.R. 3286 (119th)Bill Overview

Mammoth Cave National Park Boundary Adjustment Act of 2025

Public Lands and Natural Resources|Public Lands and Natural Resources
Cosponsors
Support
Lean Republican
Introduced
May 8, 2025
Discussions
Bill Text
Current stageCommittee

Referred to the House Committee on Natural Resources.

Introduced
Committee
Floor
President
Law
Congressional Activities
01 · The brief
Plain-English summaryWhat this bill actually does

The bill amends Section 11 of the Mammoth Cave National Park Act to authorize a boundary modification. It inserts an inflation‑adjusted $350,000 figure into that section and authorizes the Secretary of the Interior to acquire roughly 551.14 acres (and interests in land) shown on a May 2025 map for inclusion in Mammoth Cave National Park.

Why people may split

Left emphasizes conservation and public access benefits

Watch point

Relative to its intended legislative type, this bill is a narrowly scoped substantive policy change that amends an existing park statute to authorize inclusion of a specific parcel into Mammoth Cave National Park.

The bill amends Section 11 of the Mammoth Cave National Park Act to authorize a boundary modification.

It inserts an inflation‑adjusted $350,000 figure into that section and authorizes the Secretary of the Interior to acquire roughly 551.14 acres (and interests in land) shown on a May 2025 map for inclusion in Mammoth Cave National Park.

Passage65/100

Content is narrow, low cost, and administratively straightforward—typical of public‑lands bills that often become law, though dependent on committee and floor scheduling.

CredibilityAligned

Relative to its intended legislative type, this bill is a narrowly scoped substantive policy change that amends an existing park statute to authorize inclusion of a specific parcel into Mammoth Cave National Park. It names the implementing official and references a specific map and acreage, but it provides minimal explanatory, procedural, fiscal, and oversight detail.

Contention40/100

Left emphasizes conservation and public access benefits

02 · What it does

Who stands to gain, and who may push back.

Likely benefits vs burdens50% / 50%
Likely helpedLocal governments · Federal agencies

These are examples from the analysis, not a ranked list of the most-affected groups.

Likely helped
  • Potential benefitIncreases protected land, helping conserve cave, karst, and surface ecosystems within the park.
  • Potential benefitCould expand recreational and tourism opportunities at Mammoth Cave National Park.
  • Potential benefitMay preserve cultural, historic, and scientific resources under National Park Service management.
Likely burdened
  • Local governmentsAdds federal land could reduce local property tax base and alter municipal revenues.
  • Potential burdenMay restrict private development or resource uses on lands near the new boundary.
  • Federal agenciesAcquisitions could require federal spending or appropriations to purchase or manage the land.
03 · Why people split

Why the argument around this bill splits.

Left emphasizes conservation and public access benefits
Progressive90%

Likely broadly supportive: expansion protects habitat, cave resources, and public lands.

Sees park addition as conservation and recreation gain, with modest federal cost.

Leans supportive
Centrist70%

Generally favorable if costs, acquisition methods, and local impacts are transparent.

Sees conservation and economic benefits but wants fiscal and procedural safeguards.

Leans supportive
Conservative30%

Skeptical of further federal land expansion and taxpayer costs.

Concerned about property rights, federal overreach, and precedent for additional acquisitions.

Likely resistant
04 · Can it pass?

The path through Congress.

Introduced

Reached or meaningfully advanced

Committee

Reached or meaningfully advanced

Floor

Still ahead

President

Still ahead

Law

Still ahead

Passage likelihood65/100

Content is narrow, low cost, and administratively straightforward—typical of public‑lands bills that often become law, though dependent on committee and floor scheduling.

Scope and complexity
24%
Scopenarrow
24%
Complexitylow
Why this could stall
  • Whether the land is privately owned and willingness to sell
  • Absence of a formal CBO cost estimate in the text
05 · Recent votes

Recent votes on the bill.

No vote history yet

The bill has not accumulated any surfaced votes yet.

06 · Go deeper

Go deeper than the headline read.

Included on this page

Left emphasizes conservation and public access benefits

Content is narrow, low cost, and administratively straightforward—typical of public‑lands bills that often become law, though dependent on…

Unlocked analysis

Relative to its intended legislative type, this bill is a narrowly scoped substantive policy change that amends an existing park statute to authorize inclusion of a specific parcel into Mammoth Cave National Park. It na…

Go beyond the headline summary with full stakeholder mapping, legislative design analysis, passage barriers, and lens-by-lens tradeoff breakdowns.

Perspective breakdownsPassage barriersLegislative design reviewStakeholder impact map
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