1. On September 29, 1927, the Black Hills Passion Play made its debut in Spearfish, South Dakota. The annual production, which reenacts the last days of Jesus Christ, has become a popular attraction in the state.

2. In 1954, the Oahe Dam was dedicated on September 29. The massive dam, located on the Missouri River, is the second largest in the United States and provides hydroelectric power, flood control, and irrigation for the region.

3. On this day in 1970, the South Dakota State Historical Society was founded. The organization serves to promote and preserve the state's history, culture, and heritage through research, education, and public programs.

4. In 1985, the Crazy Horse Memorial in South Dakota unveiled its completed face sculpture on September 29. The monument, which depicts the Oglala Lakota warrior, has been under construction since 1948 and is still a work in progress.

5. On September 29, 2000, the Mount Rushmore National Memorial had to be evacuated when a small plane crashed into the park. The pilot and his passenger were killed in the crash, but no one on the ground was injured. The memorial was reopened the following day.