O'Mahoney, Joseph Christopher, 1884-1962

From left to right: Senator Lester C. Hunt; Secretary of the Interior Oscar Chapman; Senator Joseph C. O'Mahoney; and Michael W. Straus, Commissioner of the Bureau of Reclamation discuss the Riverton Project over lunch at the Department of the Interior. From: Oscar Chapman Scrapbook

Members of the National Petroleum Council meet in the Department of the Interior conference room. Pictured: Senator Joseph O'Mahoney (left) National Security Resources Board Chairman Stuart Symington (standing), and Secretary of the Interior Oscar Chapman (right). All others unidentified. From: Oscar Chapman Scrapbook.

Oscar Chapman (at microphone) addresses the crowd in the Department of Interior Auditorium after being sworn in as Secretary of the Interior. Seated on stage, left to right: unidentified; Senator Joseph O'Mahoney (mostly obscured); Julius A. Krug, former Secretary of the Interior; Chief Justice Fred Vinson; Ann Chapman; unidentified. All others unidentified. From: Oscar Chapman Scrapbook

The swearing in of Oscar Chapman as Secretary of the Interior. On stage, left to right: unidentified; Senator Joseph O'Mahoney; Julius A. Krug, former Secretary of the Interior; Oscar Chapman; Chief Justice Fred Vinson; Ann Chapman; unidentified. All others unidentified. From: Oscar Chapman Scrapbook

The swearing in ceremony for Oscar Chapman as Secretary of the Interior. Standing at the microphone is Senator Joseph O'Mahoney. Seated on stage, left to right: unidentified; Oscar Chapman; Julius A. Krug, former Secretary of the Interior; Ann (Mrs. Oscar) Chapman; unidentified. All others unidentified. From: Oscar Chapman Scrapbook

Oscar Chapman being sworn in as Secretary of the Interior. Left to right: Senator Joseph O'Mahoney; Julius A. Krug, former Secretary of the Interior; Chapman; Chief Justice Fred Vinson. Ceremony took place in the Department of Interior Auditorium. From: Oscar Chapman Scrapbook

Postmaster General Robert E. Hannegan (third from right) shakes hands with Iwo Jima flag raiser John H. Bradley, while handing out commemorative stamps. This is the first day of issue for the Iwo Jima commemorative postage stamp. Senator Joseph C. O'Mahoney is at left. Marine Corps Commandant General A. A. Vandegrift is at right.

From left to right: Secretary of the Interior Oscar Chapman; President Harry S. Truman; Congressman John R. Murdock; Senator Joseph O'Mahoney; and Senator Zales Ecton attend a luncheon in the dining room of the Department of the Interior for members of the Committee on Interior and Insular Affairs, the House Public Lands Committee, and the Senate Committee on Public Works.

President Harry S. Truman (back of table, fourth from right) and members of the Committee on Interior and Insular Affairs, the House Public Lands Committee, and the Senate Committee on Public Works attend a luncheon in the dining room of the Department of the Interior. Also pictured: Secretary of the Interior Oscar Chapman (back of table, fifth from right); Senator Joseph O'Mahoney (back of table, third from right); Senator Zales Ecton (back of table, second from right); Congressman John R. Murdock (back of table, standing); and Appointment Secretary Matthew Connelly (back of table, left).

O'Mahoney Committee hearing regarding disposal of Government owned pipelines. All men unidentified, except Senator Joseph C. O'Mahoney at end of table.