From the record
“The Old Sugar Mill of was part of the first commercially successful sugarcane plantation in which was founded in on the island of in 1835 by Ladd & Company. This was the beginning of what would become Hawaii's largest industry.”
Wikipedia article Old Sugar Mill of Koloa, CC BY-SA 4.0.
One of 39 National Register listings published here for Kauai County · listed in 1966 · category: Site · built in 1839 · a National Historic Landmark.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

