Title 16, ConservationRelease 119-110

§228b Composition of Park

Title 16 › CHAPTER 1 — NATIONAL PARKS, MILITARY PARKS, MONUMENTS, AND SEASHORES › SUBCHAPTER XXIV — GRAND CANYON NATIONAL PARK › § 228b

Last updated Sep 22, 2026|Official source

Summary

Adds approximately one million two hundred thousand acres to Grand Canyon National Park. The lands and waters included are those shown on map number 113–20, 021 B dated December 1974, with a copy kept at the National Park Service for public inspection. This addition is subject to any valid existing rights under the Navajo Boundary Act of 1934. The Grand Canyon National Monument and the Marble Canyon National Monument are abolished. The Secretary of the Interior must study the former Grand Canyon National Monument areas known as Tuckup Point, Slide Mountain, and Jensen Tank to see if any part should be removed from the park. The Secretary must report findings and recommendations to Congress no later than one year from January 3, 1975.

Full Legal Text

Title 16, §228b

Conservation, Source: USLM XML via OLRC

(a)Additional lands, waters, and interests therein (b) Abolition of Grand Canyon and Marble Canyon National Monuments
In order to add to the Grand Canyon National Park certain prime portions of the canyon area possessing unique natural, scientific, and scenic values, the Grand Canyon National Park shall comprise, subject to any valid existing rights under the Navajo Boundary Act of 1934, all those lands, waters, and interests therein, constituting approximately one million two hundred thousand acres, located within the boundaries as depicted on the drawing entitled “Boundary Map, Grand Canyon National Park,” numbered 113–20, 021 B and dated December 1974, a copy of which shall be on file and available for public inspection in the offices of the National Park Service, Department of the Interior.
(c)Study and report to Congress of suitability of lands included within enlarged boundaries; submission date
The Secretary of the Interior shall study the lands within the former boundaries of the Grand Canyon National Monument commonly known as the Tuckup Point, Slide Mountain, and Jensen Tank areas to determine whether any portion of these lands might be unsuitable for park purposes and whether in his judgment the public interest might be better served if they were deleted from the Grand Canyon National Park. The Secretary shall report his findings and recommendations to the Congress no later than one year from January 3, 1975.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

References in Text

The Navajo Boundary Act of 1934, referred to in subsec. (a), is act June 14, 1934, ch. 521, 48 Stat. 960, which was not classified to the Code.

Reference

Citations & Metadata

Citation

16 U.S.C. § 228b

Title 16, Conservation

Last Updated

Sep 22, 2026

Release point: 119-110