The 1.7 mile-long Fort Mc Henry Tunnel considered the most expensive tunnel project at that time—at $750 million—involved the construction of 32 immersed tube elements. Tony Lancellotti, PE served as the Lead Structural Engineer (1978 to 1985) for this project and was responsible for formulating the tunnel alignment and tube geometry, analysis, and the design of the structural steel tunnel sections including diaphragms and flange sections. He also analyzed and designed all of the reinforced concrete tunnel elements including the roadway slab, typical concrete ring sections, tube joints, tunnel ceiling, and side-wall finish including patrol booths and miscellaneous items. Tony also participated in the development of the contract documents for the immersed tube section of the tunnel and coordinated amongst the multiple disciplines involved including architectural, mechanical, and electrical. During construction of the facility, Tony led and managed the construction-phase services including the review of shop drawings for such elements as shell modules, diaphragm details, tube joint details, concrete pouring sequences, tube launching calculations and placement procedures, reinforcement and formwork drawings, and contractor change proposals and value engineering proposals. He also coordinated the construction phase services for the five construction contracts that included the East and West side ventilation buildings and their superstructures, tunnel finishes, and emergency stations.