US Forest Service Research & Development
Contact Information
  • US Forest Service Research & Development
  • 1400 Independence Ave., SW
  • Washington, D.C. 20250-0003
  • 800-832-1355
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James P. Wacker

Research General Engineer
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: 608-231-9224

Research Interests

  • Developing improved relationships between several NDE techniques and different stages of decay
  • New inspection methods and/or long-term performance monitoring of exterior timber structures
  • New repair and rehabilitation techniques for highway and railroad bridges


  • University of Wisconsin-Madison, B.S. Civil and Environmental Engineering, 1990

Professional Organizations

  • American Society of Civil Engineers, Chair of Timber Bridges Technical Committee, Member
  • Forest Products Society, Member

Featured Publications & Products

Publications & Products

Research Highlights


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 ...


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 ...


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 ...


Scientists Study True Longevity of Timber Highway Bridges

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


Last updated on : 10/06/2014