H&H has led a joint venture team for multiple cycles of the $15 million multi-year contract to perform safety inspections, load ratings, and remedial design of the Maryland Transportation Authority’s facilities Statewide. H&H led the effort to perform the inspections on all eight of the MDTA facilities including their signature long span bridges: William Preston Lane Bridge (US50/301 over the Chesapeake Bay); Harry W. Nice Bridge (US 301 over Potomac River); Millard E Tydings Bridge (I-95 over the Susquehanna River); Thomas J. Hatem Bridge (US40 over the Susquehanna River); Francis Scott Key Bridge (I-695 over Patapsco River); K-Truss Bridge (I-895 over CSXT RailRoad). H&H performed the inspection of the suspension span, through- truss span and deck truss span portions on the William Preston Lane Memorial Bridge, approach span portions of the Harry W. Nice Bridge and the deck truss spans of the Millard E. Tydings Bridge, the through truss and suspended deck span of the Francis Scott Key Bridge as well as portions of the Baltimore Harbor and Fort McHenry Tunnel Systems.
Structural – The structural portion of these safety inspection consists of the annual inspections of MDTA’s 1500+ assets including 308 workhorse bridges and the seven signature bridges, small structures, retaining walls, noise walls, sign structures and high mast light poles, the Curtis Creek Bascule Span, fender and dolphin structures, toll facilities, drainage and roadway safety associated therein. The structures are comprised of a wide variety of construction and material types including, suspension spans, steel deck truss spans, steel cantilevered deck truss spans, prestressed concrete arch, prestressed concrete beams, cast-in-place concrete, weathering steel, box girders, box culverts, arch culverts, and pipe culverts.
Mechanical & Electrical – H&H performed the mechanical and electrical inspection of Curtis Creek Bascule Span movable bridge operating machinery, lock machinery and electrical systems including MDTA’s first “in-depth” inspection which involved disassembly and testing of mechanical and electrical systems. Electrical work was also performed on Bear Creek and the Bay Bridge Westbound Anchorage Pier and the West Approach Loading Dock.
Civil – The H&H led team inspected over 100 miles of pavement and right of way on the facilities.
Rope Access – H&H has utilized rope access techniques on the Francis Scott Key Bridge and the William Preston Lane Bridge. Using vertical drops, power chairs, and rigged lines, the teams inspected suspension cables, suspender ropes, top and bottom truss chords, and other superstructure elements. These techniques greatly reduced the number of lane closures and disruption to the public and expedited the inspections.