Lassen Volcanic National Park - Mineral CA According to a National Register of Historic Places form for Lassen National Park, “In 1933, with the establishment of the Civilian Conservation Corps (CCC), trail construction, campground development and road maintenance benefited from hundreds of laborers, who accelerated the pace of park infrastructure development….CCC workers provided most of the labor on spring clean up and road maintenance projects, including gutter line cleaning and slope stabilization. They built facilities at the park's developed campgrounds, as well as many of the park's 150 miles of hiking trails.”
The CCC also removed dead timber (for fire prevention), developed scenic parking areas, made trail signs,...