Eldon Abbott, in his more than 40 years of experience he has managed the design of and participated in numerous complex transit, marine, parking, tunnel, and highway projects. His managerial assignments include project manager for the re-evaluation study for a sub-aqueous tunnel crossing under the Main Shipping Channel in Miami’s Biscayne Bay, preparation of design/build criteria documents for a concession project to construct the Port of Miami Tunnel for the Florida Department of Transportation (FDOT); design and construction phase services for the North Dorchester combined sewer overflow (CSO) tunnel in South Boston, Massachusetts; manager of construction services for the Boston Harbor Effluent Outfall Tunnel; underground portions of a $96 million health care facility with a five-level underground parking garage; design of an award-winning 1,400-car, seven-level underground parking garage and urban park; and design of emergency ventilation improvements for Boston's Red, Green and Blue subway lines.Tunnels• SR 99 Deep Bored Tunnel, Seattle Washington: task lead for preparation of the Design Criteria documents for Design-Build procurement by the Washington Department of Transportation for construction of a $1.9 Billion, 50-foot internal diameter highway tunnel where the roadways will be stacked one over the other, with two lanes in each direction. • Port of Miami Design/Build Criteria Documents, Florida: project manager for the preparation of design build criteria documents for bidding of concession project by FDOT to construct a vehicular tunnel linking the Port of Miami with interstate highways I-395 and I-95 in downtown Miami. • North Dorchester CSO Tunnel, Boston, Massachusetts: project manager for the design of a 17-foot-diameter (5-meter-diameter) soft ground tunnel—the North Dorchester Bay CSO Consolidation conduit to enable the permanent closure of seven combined sewer outflows into North Dorchester Bay within Boston Harbor.