FALL 2009

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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Page 33 of 55

The new Roslyn Viaduct Bridge on Route 25A over Hempstead Harbor, Long Island, N.Y., provides a wider, aesthetically pleasing and effective design that replaces a deteriorating 1949 steel bridge that could not handle the growing traffic volume. The new segmental precast concrete structure, featuring haunched box girders, provides a 75-year service life, minimizes impact to the public and its surroundings, and complements the area's many historical structures and characteristics. It also represents the first bridge of this type on Long Island. The $127-million project is a key east-west roadway in Nassau County, carrying 38,000 vehicles each day. Significant challenges arose in designing the best alternative, as a replacement structure required demolishing the existing bridge while maintaining traffic flow. Rehabilitation was considered, but officials agreed that replacement was preferred, as the structure was an aging non-redundant two-girder structure with pin and hanger construction. profile ROSLYN VIADUCT / N.Y. ROUTE 25A OVER HEMPSTEAD HARBOR, NASSAU COUNTY, N Ew YORk ENGINEER: Hardesty & Hanover LLP, New York, N.Y. CONSTRUCTION INSPECTION: STV Inc. / PB Americas Inc. Joint Venture, New York, N.Y. PRIME CONTRACTOR: Tully Construction Co., Flushing, N.Y. CONTRACTOR CONSTRUCTION ENGINEER: weidlinger Associates Inc., Mountain Lakes, N.J., and HDR Inc., Newark, N.J. CONSTRUCTABILITY REVIEWS: FIGG Bridge Engineers Inc., Exton, Pa. PRECASTER: Bayshore Concrete Products Inc., Cape Charles, Va., a PCI-certified producer AWARDS: Named among "Top 10 Bridges in North America" in 2007 by Roads & Bridges magazine Haunched box girders made with high-performance concrete provides strong aesthetics and long service life for Long Island replacement bridge by Eileen Peters, New York State Department of Transporation BUILDING a BrIDGe IN tIGht qUarters The new Roslyn Viaduct over Hempstead Harbor on Long Island, N.Y., which is still under construction, features the area's first precast concrete segmental bridge. The design helped reduce noise, dust, and vibration while providing an aesthetic solution. Photo: Rich Lorenzen. Rendering (below): Hardesty & Hanover LLP. 32 | ASPIRE , Fall 2009 ASPIRE_fall09.indb 32 9/11/09 3:06:09 PM

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