Navajo lands, and they played a significant role in the monument's further development. In 1931, Everett H. Kimmell, another U.S. surveyor, found this newer stone had broken too and he replaced it with a brass disc marker set in concrete. In 1962, the Bureau of Land Management and the Bureau of Indian Affairs poured an elevated concrete pad around the 1931 brass marker; this pad included the state border lines and names in tile. The monument was completely rebuilt in 1992, and the 1931 brass marker was replaced with a disc-shaped aluminum-bronze plate set in granite. The monument was again rebuilt in 2010, although the disc-shaped plate from 1992 remained in place. Misplacement controversy Since the early 20th century, controversies have arisen regarding the accuracy of the monument's placement. After the initial surveys, it was found that the borders did not always follow the lines of meridian and parallel (as had been intended) due to the primitive surveying technology available at the time. This discrepancy left the four states asking if the correct borders were the exact lines of meridian and parallel (and if new, more accurate, surveys needed to be done), or if the markers placed during the initial surveys were now the actual border. New Mexico sued Colorado in 1919, and when the Supreme Court in 1925 ruled that the markers placed during the initial surveys were the actual borders, even if the markers were off in some locations (this includes the Four Corners Monument), the issue was resolved. Today's legal description of these border lines is based on the original markers, and not the written description of the borders created when the territories were formed. Because of this, the borders between these states are not perfectly straight and often zigzag. One example is the border between Colorado and Utah, where in one area the border jogs west about from where it was intended to be placed by the written description (i.e. the 32nd meridian west of Washington). ). Because of the Supreme Court decision, the border set out by the markers remains the border between the two states. This issue resurfaced briefly in 2009 with U.S. media reports that the monument was placed west of its intended location. This was soon found to be the result of a mistaken assumption: that the Prime Meridian, used in the United States since 1912, was used. In actuality, the 19th