THE CONCRETE BRIDGE MAGAZINE

FALL 2011

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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42 | ASPIRE , Fall 2011 F H WA F H WA T he Office of Federal Lands Highway (FLH) provides program stewardship and transportation engineering services for planning, design, construction, and rehabilitation of the highways and bridges that provide access to and through federally owned lands. The federal government has title to about 650 million acres—roughly 30% of the total area of the United States. There are more than 300,000 miles of federally owned roads. FLH has four offices—Headquarters, and Eastern, Central, and Western Divisions—to provide services to the FLH partners. FLH works closely with the federal land management agencies (FLMAs) and many state and territorial partners. FLMAs include the Bureau of Indian Affairs (BIA), U.S. Forest Ser vice (USFS), National Park Service (NPS), Fish and Wildlife Service (FWS), Bureau of Land Management (BLM), Militar y Surface Deployment and Distribution Command (SDDC), U.S. Army, U.S. Army Corps of Engineers (USACOE), U.S. Navy, Tennessee Valley Authority, and the Bureau of Reclamation (BOR). the Federal Lands Highway Program The primary purpose of the Federal Lands H i g h wa y P r o g r a m ( F L H P ) i s t o p r o v i d e financial resources and technical assistance for a coordinated program of public roads that service the transportation needs of federal and Indian lands. One of the major factors associated with the success of the program is the Federal Highway Administration's strong relationship with our federal, state, local, and tribal partners. the FLH Bridge o ffice Within FLH, each of the three Divisions (Eastern, Central, and Western) has a Bridge Office. The Eastern (EFLHD) Office is the largest of the three Divisions with 29 people. The Central (CFLHD) and the Western (WFLHD) Offices are made up of nine and three people, respectively. the FLH Bridge Program The FLH Bridge Office performs bridge engineering in three program areas: Bridge Inspection, Bridge Asset Management, and Bridge Design and Construction. The Bridge Inspection Pr ogram (BIP) Team based in EFLHD performs bridge safety inspections for eight federal agencies across a nationwide geographic area. The BIP unit inspects nearly 2000 structures with the National Park Service (NPS) structures accounting for approximately 95% of the total. The WFLHD staff also performs safety inspections for a select portion of the Bureau of Land Management's inventory in the State of Oregon. The Bridge Asset Management team, located in EFLHD, works with all three FLH Divisions and in partnership with the NPS to assist in d e v e l o p i n g t h e i r b r i d g e r e h a b i l i t a t i o n / replacement program. Evaluative and predictive tools are used to formulate recommended work priority lists for each of NPS's seven geographic regions. The Bridge Design and Construction Program is carried out by staffs in the three FLH Divisions. The FLH Bridge Office is focused on designing bridges in-house, providing review expertise for structures designed by others, and providing technical support for the building of these structures. Concrete Bridge Projects Over the years, FLH has often been tasked with building bridges in sensitive sites where aesthetic and environmental considerations greatly influence the choice of structure type and construction method. In many cases, concrete has offered the preferred solution. Several notable examples are; the O'Callaghan-Tilman Memorial Bridge, which bypasses the Hoover Dam and employs a segmental concrete arch as the main supporting component; the Blue Ridge Parkway Viaduct—a precast segmental concrete box girder with very severe horizontal alignment challenges that was erected using top-down construction; and the Natchez Trace Arch Bridge—a segmental concrete box girder that is suppor ted on segmental concrete arches and pier columns. A current challenging project is the design and construction of Bridge No. 2 on the Foothills Parkway in Tennessee. The EFLHD Bridge staff provided the conceptual engineering for this project and is now providing technical assistance to help administer its final design and the office of Federal Lands Highway by Gary Jakovich, Hratch Pakhchanian, and M. Myint Lwin, Federal Highway Administration The Mike O'Callaghan–Pat Tillman Memorial Bridge over the Colorado River at Hoover Dam. Photo: McNary Bergeron & Associates Inc. Book_Fall11.indb 42 9/29/11 12:00 PM

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