Long Bridge
H&H is serving as the overall structural design lead for the Long Bridge project and designing the new two-track rail bridge over the Potomac River and the Virginia rail bridge spanning the George Washington Memorial Parkway. The Virginia Department of …
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Portal North Bridge Capacity Enhancement CSS
H&H will be serving as lead Construction Support Services Consultant to Amtrak on the $1.5B project to replace the aging Portal North Bridge. The 111-year-old bridge over the Hackensack River will be replaced with a high-level, fixed span, network tied-arch …
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GCRTA Waterfront Bridge
H&H will inspect, load rate, and prepare engineering documents for the rehabilitation of this bridge on the Waterfront Line for the Greater Cleveland Regional Transit Authority (GCRTA). The work includes evaluation of adjacent MSE walls and track and the design …
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Replacement Of Six Bridges Over The Metro North Railroad New Haven Line
H&H is currently finalizing engineering services for the superstructure replacement, foundation rehabilitation, and seismic retrofit of six bridges in the City of Mount Vernon, NY over the Metro-North Railroad New Haven Line. Each bridge was constructed in the late 1890s …
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Dulles Metrorail
The Dulles Metrorail project is a 23-mile extension of the existing Metrorail system from East Falls Church to the Washington Dulles International Airport. Phase One is a $1.6 billion design-build project that included the Tyson’s Guideway, with more than 5.2 …
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Manhattan Subway Enhanced Stations Initiative Program
H&H is serving as the lead designer for Package 3 of NYC Transit’s Enhanced Station Initiative (ESI) program. H&H teamed with design-build lead contractor ECCO III Enterprises and joint venture partner LHP Architects. This fast-track design-build project involved the major …
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South Branch Vertical Lift Bridge
H&H is leading the design for mechanical and electrical upgrades for the South Branch Bridge. Work includes designing the replacement of electrical cables, transformers, switchboards, and other associated electrical upgrades. The bridge has eight counterweight sheaves. Each sheave carries 16 …
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Brielle Bridge Replacement
H&H has been selected to conduct a feasibility study for the replacement of the 100-year-old Brielle Bridge, spanning the Manasquan River between Brielle and Point Pleasant. Built in 1911 and rehabilitated in 1978 and 2001, the Scherzer rolling-lift bascule bridge and …
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