Question: The F Street Bridge in Salida Colorado is a closed spandrel concrete arch bridge built in 1907 by the Pueblo Bridge Company. The design also known as a Luten Arch was patented in 1907 by Daniel Luten. The bridge with 2 spans and a total length of 60 feet (18 m) is believed to be the first bridge of this type built by the company. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Building