Between the years 1891 and 1913, a total of 60 structures were erected at Fort Yellowstone, of which 35 were still in existence one hundred years later.
بين عامي 1891 و 1913 ، ما مجموعه 60 بناية شيدت في حصن يلوستون ، منها 35 لا تزال موجودة بعد مائة سنة.