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H.R. 3286

BillFederalHouseIn Committee
Mammoth Cave National Park Boundary Adjustment Act of 2025
About This Bill
Committee
Latest Action · March 18, 2026
Subcommittee Hearings Held
Congress
119th (2025–2027)
Introduced
May 8, 2025
Cosponsors (5)
1D 4R
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Summary

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This bill authorizes the Secretary of the Interior to expand Mammoth Cave National Park in Kentucky by adding approximately 551 acres of land on the park's southern boundary in Edmonson and Barren Counties. The legislation modifies the existing 1942 law that established the park's original boundaries and acquisition authority. The bill also adjusts the previous $350,000 land acquisition spending limit for inflation using the Consumer Price Index, allowing the government to acquire additional land at current market values. No specific new funding amount or timeline is designated in the legislation; rather, it grants the Interior Secretary the authority to acquire the designated land when feasible. The expansion would add contiguous land to the national park, which is home to the world's longest cave system.

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