The missing person, Grace A. Weber, was last seen in the Jasper County, Missouri area on 10/06/1994. The missing person's vehicle was later recovered at Twin Bridges Park in October, 1994. The Twin Bridges Area at Grand Lake State Park, previously Twin Bridges State Park, is a park on the north side of the Grand Lake in northeastern Oklahoma. It was named for the two bridges that carry U. S. Highway 60 over arms of the lake that connect to the Neosho River and the Spring River.