![0022:0130: U. S. Bureau of Mines Collection - C-811-BC Annex Building, Looking West ["This building was originally built in 1931 and was used by a construction firm during the building of Hoover Dam. It was purchased by the Bureau of Mines in the fall of 1938, moved to the Bureau property in sections, and erected to serve as a temporary shelter for a small pilot-plant operations being conducted at that time. This was the second building to be erected on the Bureau of Mines property. Through the years the building has been altered many times inside, the latest being in 1945, when the entire rear end of the building was built in to house Physical laboratories. See photo C-810-BC for details. The frame of this building is of steel and the outside is covered with corrugated sheet metal and painted with aluminum paint."] [photo taken 1952] [same as 0022:0027c]](https://d8e7jbdw4fu0e.cloudfront.net/4452/c369dbd0-c2c3-11ee-80d0-913e4ef26a17-wzIJH6T.lg-nt@2x.jpg)
U. S. Bureau of Mines Collection - C-811-BC Annex Building, Looking West ["This building was originally built in 1931 and was used by a construction firm during the building of Hoover Dam. It was purchased by the Bureau of Mines in the fall of 1938, moved to the Bureau property in sections, and erected to serve as a temporary shelter for a small pilot-plant operations being conducted at that time. This was the second building to be erected on the Bureau of Mines property. Through the years the building has been altered many times inside, the latest being in 1945, when the entire rear end of the building was built in to house Physical laboratories. See photo C-810-BC for details. The frame of this building is of steel and the outside is covered with corrugated sheet metal and painted with aluminum paint."] [photo taken 1952] [same as 0022:0027c]