{"id":33,"featured":0,"modified":"2026-04-17 19:40:05","latitude":46.01126789505875791519429185427725315093994140625,"longitude":-112.55742584346256762728444300591945648193359375,"title":"Montana Tech Campus Mill Building","subtitle":"Butte National Historic Landmark District","fullsize":"https://mail.historicmt.org/files/fullsize/ae3c9dcd78c048223f3c1f45fcf314d6.jpg","address":"1300 West Park Street, Montana Tech Campus, Butte, Montana","all_locations":[],"zoom":17,"creator":["Montana National Register Sign Program"],"description":"Only nine of Main Hall’s twenty-five rooms were originally furnace heated. To remedy that situation, the mill building was constructed during 1907 and 1908 to house a large heating plant. This second campus building furnished steam heat to Main Hall and, later, to other campus buildings. Although no longer in use, its huge boilers remain intact. The mill building also accommodated the assay laboratories, which were moved from Main Hall’s unheated south basement. The assay equipment was modernized in 1923 and a flotation plant installed a few years later. At one time resident faculty occupied its upper floor. Designed in the Renaissance Revival style to architecturally complement Main Hall, but not overshadow its grandeur, the mill building’s subtle ornamentation includes brick string courses that horizontally divide its façade and a steplike frieze below the cornice. A band of lunettes adorns the west end of the north façade while a three-story capped chimney towers above.","sponsor":null,"accessinfo":"Public","lede":"","website":"","related_resources":["<a href=\"https://npgallery.nps.gov/NRHP/GetAsset/b2694698-4c33-4e3d-b1f9-d8b8740bf6dc\" target=\"_blank\" rel=\"noreferrer noopener\">Read about the Butte National Historic Landmark District</a>","<a href=\"https://npgallery.nps.gov/NRHP/GetAsset/9ecb5fd7-e392-42a7-a16e-94df0f020422/\" target=\"_blank\" rel=\"noreferrer noopener\">See photos of the Butte National Historic Landmark District</a>"],"factoids":[],"files":{"https://mail.historicmt.org/files/fullsize/ae3c9dcd78c048223f3c1f45fcf314d6.jpg":{"id":4286,"mime-type":"image/jpeg","title":"Montana Tech Campus Mill Building","description":"Montana Tech Campus Mill Building. Front to side view of the building, facing southwest. | Montana State Historic Preservation Office | Mar. 1980 | John Westenberg","thumbnail":"https://mail.historicmt.org/files/square_thumbnails/ae3c9dcd78c048223f3c1f45fcf314d6.jpg"}}}