Given the abundance of Civilian Conservation Corps projects all across America in the 1930's, including many in the Black Hills – this video should be of great interest to history buffs across the region. Dakota Life is a wonderful series produced by South Dakota Public Broadcasting.
I think you'll enjoy this Reflections and Preservation episode of the Dakota Life series. The "CCC in the Black Hills" segment was produced by Brian Gevik. Perhaps it'll spur you to visit the small but impressive CCC Museum on the outskirts of Hill City.