Accession Number: C.2022.74.1
Dimensions: 4 in X 11 in X 15.5 in
Dimensions (Metric): 10.16 cm X 27.94 cm X 39.37 cm
Credit Line: Gift of the Halley family
Plaque awarded to Leo Halley for his work in connection with the construction of the Slurry Wall at the World Trade Center. The plaque is wood in the shape of a shield with a steel circle in the center with several small twisted steel tie-backs sticking out. The engraved plaque reads: "LEO HALLEY | World Trade Center Slurry Wall | 1966 - 1967 | Presented by W.T.E.D.D."
Leo M. Halley was a civil engineer who worked for the PANYNJ’s World Trade Engineering Design Division, which oversaw construction of the World Trade Center in the 1960s. Of note, Halley was closely involved with the creation of the site’s slurry wall, built as a concrete foundation beneath the buildings for the purpose of keeping water from the nearby Hudson River out of the worksite. In 1966 or 1967, in recognition of his contributions to that project, Halley was awarded a plaque whose materiality and design reference the tiebacks which serve as a distinctive visual and functional feature of the Slurry Wall itself.