From the record
“Chi-Sandra Garden, also known as 10IH1779, is a garden located within Payette National Forest in Idaho, United States. The garden was established by the Chinese American community to feed migrant laborers who worked in the mines.”
Wikipedia article Chi-Sandra Garden, CC BY-SA 4.0.
One of 42 National Register listings published here for Idaho County · listed in 1990 · category: Site.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service