Quick search by citation:

33 U.S. Code § 33 - Little River, Arkansas, from Big Lake to Marked Tree

Little River, from Big Lake in Mississippi County to Marked Tree in Poinsett County, Arkansas, is declared to be not a navigable waterway of the United States within the meaning of the laws enacted by Congress for the protection of such waterways.

(Mar. 2, 1919, ch. 95, § 4, 40 Stat. 1287.)
Editorial Notes
Codification

Section is from section 4 of act Mar. 2, 1919, popularly known as the “Rivers and Harbors Appropriation Act of 1919”.