Attachment D_Reference Drawings.pdf

These are architectural and engineering drawings for the St. Lawrence Seaway tunnel section, specifically detailing the "Section Thru Lock" and "Section Thru Embankment" components of the St. Lawrence Seaway Development Corporation's Iroquois Lock facility. The drawings are dated October 1955 and were prepared by the Saint Lawrence Seaway Development Corporation in cooperation with the U.S. Army Corps of Engineers.

The documents contain detailed technical specifications for tunnel construction, including cross-sectional profiles, longitudinal sections, and construction details. The drawings show concrete reinforcement specifications, drainage duct access points, ceiling reinforcement for slab construction, and embankment construction methods. Multiple detail callouts address specific structural elements such as handrails, joints, waterproofing requirements, and slope configurations. The drawings include dimensioned plans at various scales (1:16" and 1:32" scales noted) with extensive notes regarding concrete specifications, reinforcement placement, and construction sequencing. These are "As Constructed" drawings that document the completed tunnel facility, demonstrating the final engineered condition of the lock infrastructure as built.