Columbia Cement Division of Pittsburgh Plate Glass Co. received an award for a perfect safety record in 1931 and was reawarded for perfect safety records in 1935, 1947, 1948, 1950, 1951, 1952, 1956, 1958, 1960, 1961, 1965, 1966, 1969, 1970, 1971, 1972, 1974, and 1975.