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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of The Portland Mills Covered Bridge in Parke County, Indiana, has a Burr-Archtruss design. James Wacker, Forest Service
ID: 284
America's Historic Covered Timber Bridges

Covered wooden bridges proliferated in the United States in the mid-nineteenth century. Today an estimated 800 covered bridge structures remain ...

Principal Investigator : James P. Wacker

Resource Management and Use2011FPL
Photo of Researcher Xiping Wang inspects field exposed specimens with ground penetrating radar.
ID: 1285
Assessing the ability of ground-penetrating radar to detect internal moisture and fungal decay

Internal moisture and fungal decay are detected in structural bridge members using ground penetrating radar for faster evaluation of timber brid ...

Principal Investigator : James P. Wacker

Outdoor Recreation
Inventory and Monitoring
2017FPL
Photo of
ID: 170
Centennial Edition, Wood Handbook—Wood as an Engineering Material

The Wood Handbook—Wood as an Engineering Material serves as a primary reference document for a wide variety of users-from the general publ ...

Principal Investigator : James P. Wacker

Resource Management and Use2010FPL
Photo of The Cox Ford Bridge in Parke County, Indiana, has a Burr-arch truss configuration. James Wacker, USDA Forest Service
ID: 433
Keeping America's Historic Covered Bridges Safe for Vehicular Traffic

The Forest Products Laboratory, in partnership with the Federal Highway Administration and the National Park Service is sponsoring a comprehensi ...

Principal Investigator : James P. Wacker

Resource Management and Use2013FPL
Photo of Bridge No. 738 located in Yakima County, Washington, remains in satisfactory condition after 75 years of service. James Wacker, USDA Forest Service
ID: 434
Scientists Study True Longevity of Timber Highway Bridges

Do timber bridges last longer than concrete or steel bridges in similar climates´┐Ż This national project aims to generate more reliable data ab ...

Principal Investigator : James P. Wacker

Resource Management and Use2013FPL
Photo of The Catt Bridge is located in Buchanan County, Iowa, and is supported by GRS abutments and equipped with a smart bridge system.
ID: 1281
Smart timber bridge on geo-synthetic reinforced soil abutments

Forest Service researchers partnered in the construction and monitoring of an innovative bridge abutment system, developed to be lower cost and ...

Principal Investigator : James P. Wacker

Water, Air, and Soil
Resource Management and Use
2017FPL