Rehabilitation of Nine Stations and Line Structures on the Sea Beach Line
Award of Merit
Lead Design Firm | Civil and Structural Engineer: HDR
General Contractors: Skanska USA Civil; John P. Picone Inc.
MEP Engineer: Chu & Gassman
The $396-million facility rehabilitation program erased years of disrepair and deterioration, restoring the historic station’s appearance and functionality.
The station control houses are bordered by more than 1,000 adjacent properties, with many platforms carved beneath backyards, garages and patios, and their historic details were critical to the restoration. Material choices and design details were applied to all nine stations, along with the addition of new staircases, lighting and finishes; artwork and mosaics; rehabilitated platforms; enhanced safety features; and upgraded communication systems.
Each site presented its own challenges. At one station, limited ground load bearing capacity and underground utilities were resolved through the use of injection soil grouting and spread footings in lieu of deep foundation piling. A pile-supported structural table at an elevated station spanning a local street supports new elevator towers without compromising vertical clearance for trucks. The elevator shaft’s steel frame was prefabricated and assembled off site, then installed as a single structural unit to minimize neighborhood disruptions.