Pictured L-R: O. G. Patch, Walker R. Young, and G. G. Walker at the Old Las Vegas Fort, which was renovated into a concrete testing laboratory for the Bureau of Reclamation (1929-1930).
Pictured L-R: O. G. Patch, Walker R. Young, and G. G. Walker at the Old Las Vegas Fort, which was renovated into a concrete testing laboratory for the Bureau of Reclamation (1929-1930).
Pictured L-R: O. G. Patch, Walker R. Young, and G. G. Walker at the Old Las Vegas Fort, which was renovated into a concrete testing laboratory for the Bureau of Reclamation (1929-1930).