Potomac River. Regulating erection of structures on Potomac River adjacent to proposed George Washington Memorial Parkway in District of Columbia, hearings, 71st Congress, 2d session, on S. J. Res. 159 [182] and H. J. Res. 345, prohibiting location or erection of any wharf or dock or artificial fill or bulkhead or other structure on shores or in waters of Potomac River within District of Columbia without approval of commissioners of District of Columbia and director of public buildings and public parks of National capital, June 18 and 20, 1930.

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