In order to carry out the main objectives of the plan, Congressional action was necessary. In 1950 bills (H.R. 7342 and S. 3081) were introduced in the 81st Congress by Representative Case and Senator Chandler Gurney to implement the proposed land exchange. H.R. 7342 was passed by the House without amendment, but later the bill died in the Senate. The senate bill (S. 3081) was not considered. In 1951 Senator Francis H. Case, who had just been elected to that office, and Congressman E.Y. Berry introduced identical bills (S. 896 and HR. 3540) in the 82nd Congress. These were similar to the ones proposed a year earlier. Berry’s bill passed the House on July 2, 1951, without amendment. The House Act was referred to the Senate Committee on Interior and Insular Affairs, which recommended that section five of H.R. 3540 be dropped. This section would have provided authority to include 4,000 acres of the Pine Ridge Indian Reservation in the Sheep Mountain area provided certain conditions were met. The committee believed “that a satisfactory solution should be worked out with the Tribal Council of the Oglala Sioux Tribe of Indians, and any others interested, before legislation with regard to these lands is enacted.”[201] The bill in its amended form, including another minor change recommended by the committee, passed the Senate on January 24, 1952.[202] [Illustration: Figure 23 AREA CHANGES IN BADLANDS NATIONAL MONUMENT[203]] Area authorized in 1929 (dashed line) 50,830.40 acres Area upon establishment in 1939 154,119.46 acres Area after changes of 1952 122,642.52 acres Area after changes of 1957 (heavy line) 111,529.82 acres Acreage figures are latest available and may be different from figures which were current during each of the four times the park boundary has been redesignated. Because of these acreage revisions, additions to and deletions from the park do not total correctly. Badlands National Monument South Dakota One section (1 mile square—640 acres) Eliminated in 1952 31,442.52 acres Added in 1952 4,449.29 acres Eliminated in 1957 11,234.09 acres Added in 1957 241.39 acres