From the record
“Civilian Conservation Corps Camp in State Park is located at Hawaii Route 550, in Waimea, on the island of in the U.S. state of Hawaii. It was built in 1935 with lumber that was put into the saltwater and floated to the shore at Port Allen, the seawater adding a natural termite protection to the lumber.”
Wikipedia article Civilian Conservation Corps Camp in State Park, CC BY-SA 4.0.
One of 39 National Register listings published here for Kauai County · listed in 1996 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
