Derrick Boom Overhead

Caption says, "A-41 Altus Project. Stiff-leg derrick boom over head lifting huge granite rocks into place for plug and feather drilling."
Date: January 10, 1941
Creator: Breitenstein, Frank C.
System: The Gateway to Oklahoma History

WPA Rock Crushers

WPA laborers using rock crushers that are sitting on a granite wall and dumping into a large pile of already crushed granite. Caption says, "A-40 Altus Project. WPA rock crushers Nos. 9 and 11 mounted on a masonry foundation of granite blocks on south edge of rock quarry. Granite that is too small for squaring into blocks will be crushed into material for concrete."
Date: January 10, 1941
Creator: Breitenstein, Frank C.
System: The Gateway to Oklahoma History