Roslyn Viaduct

In 2010, Siefert Associates, LLC completed work for the Roslyn Viaduct Bridge Project, a full replacement of the existing Rte. 25A viaduct over the Hempstead Harbor with a new pre-cast concrete segmental bridge structure. SALLC and Tully / NAB Construction utilized the innovative solution of a Deal Launching Girder System for the demolition of entire spans in order to minimize the construction time and costs of the project. In addition to demolition plans, SALLC provided plans for structure lifting operations, temporary support systems, and many other construction engineering services.