Civilian Conservation Corps (CCC)

Multiple CCC companies were added in 1938 to aid in development. Within three months the original cave work was halted and a more suitable cave was found for development. A 3,000 ft underground trail system was surveyed, designed, and architectural drawings were produced for entry and exit portals, cavern lighting systems, and above ground facilities. Steel doors were installed to secure cavern entrances and exits. CCC enrollees known as the Gopher Gang worked 55 feet underground in an average temperature of 65 degrees with pick and shovel to enlarge passages through limestone bedrock and excavated mud from the caverns to open the labyrinth of caverns.
The CCC work also included a fire observation tower, roads, walks, bridle trails, bridges, a water system, public picnic grounds, covered picnic tables, open fire places, a light plant, quarters for a caretaker, a picnic pavilion, an administrative building and museum, a post office building, landscaping, cave entrance and accessibility improvements, bathing facilities, and river docks.
1938-1941