United States Senate Committee on Energy and Natural Resources, formerly known as the Senate Committee on Public Lands
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Crawford was the ranking minority member on the Committee on Public Lands in the 81st and 82nd Congresses (1950–1952).
He served as chairman on the Committee on Public Lands in the 16th and 18th Congresses.
He served as chairman of the Committee on Public Lands (Sixty-sixth through Seventieth Congresses), and the Committee on Patents (Seventieth Congress).
He served as chairman of the Committee on Public Lands in the 28th Congress, 1843–1844, and of the Committee on Patents and the Patent Office in the 29th Congress, 1845–1846.
He served as chairman of the Committee on Elections No. 1 (Sixty-ninth and Seventieth Congresses), Committee on Public Lands (Seventieth and Seventy-first Congresses).
He served as chairman of the Committee on Public Lands (Fifty-first Congress).
He served as chairman of the Committee on Mileage (Forty-fifth and Forty-sixth Congresses), Committee on Public Lands (Forty-eighth and Forty-ninth Congresses).