1. National Best Practices Conference Covered Bridge Preservation Covered Bridges The First National Covered Bridge Conference Burlington, VT June 5-7, 2003 Presented by: Sean T. James, P.E. Hoyle, Tanner & Associates, Inc. Manchester, New Hampshire Burlington, Vermont Lessons Learned

2. National Best Practices Conference Covered Bridge Preservation Historical Research Inspection Roof Types Structural Upgrade Maintenance Introduction

3. National Best Practices Conference Covered Bridge Preservation Need for Research Review by SHPO Sources National Society for the Preservation of Covered Bridges (NSPCB) State Department of Transportation (DOT) State Historic Preservation Office (SHPO) Historic American Engineering Record (HAER) City or Town Files and Annual Reports Local Historic Committee Local Newspaper Archives Covered Bridge Related Books Local Residents Historical Research

4. National Best Practices Conference Covered Bridge Preservation Historical Research Examples Swiftwater Covered Bridge – Bath, NH Built in 1849 Paddleford Trusses Arches Added in 1930’s Rehabilitation in 1998 Haverhill/Bath Covered Bridge – Haverhill/Bath, NH Completed in 1829 Town Lattice Trusses Arches Added in 1920’s Rehabilitation in Fall of 2003

5. National Best Practices Conference Covered Bridge Preservation Historical Research

6. National Best Practices Conference Covered Bridge Preservation Historical Research

7. National Best Practices Conference Covered Bridge Preservation Historical Research

8. National Best Practices Conference Covered Bridge Preservation Historical Research

9. National Best Practices Conference Covered Bridge Preservation Difficult Access for Most Bridges Critical to Successful Project Much Deterioration is Hidden Inspection Assistance Removal of Siding Rigging Inspection Equipment Inspection

10. National Best Practices Conference Covered Bridge Preservation Inspection

11. National Best Practices Conference Covered Bridge Preservation Inspection

12. National Best Practices Conference Covered Bridge Preservation Inspection

13. National Best Practices Conference Covered Bridge Preservation Inspection

14. National Best Practices Conference Covered Bridge Preservation Inspection

15. National Best Practices Conference Covered Bridge Preservation Roof Types Several Common Types Asphalt Shingle Use is Not Common on Covered Bridges Not Historically Accurate Wood Shake Most Expensive Difficult to Make Watertight

16. National Best Practices Conference Covered Bridge Preservation Roof Types Metal Panel Poor Connection Detail Standing Seam Metal Preferred Type Good Details Long Lasting Multiple Colors

17. National Best Practices Conference Covered Bridge Preservation Roof Types

18. National Best Practices Conference Covered Bridge Preservation Roof Types

19. National Best Practices Conference Covered Bridge Preservation Structural Upgrades Most Covered Bridges Were Not Designed for Modern Vehicular Loads Upgrades Often Needed for Emergency Vehicles Three Upgrade Options Replacement of Bridge Members Splicing or Sistering Addition of Supplemental Supports

20. National Best Practices Conference Covered Bridge Preservation Structural Upgrades Union Village Covered Bridge, Thetford, VT Built in 1867 Longest Multiple Kingpost Bridge in Vermont H8 (8 Ton) Capacity H20 (20 Ton) Goal 3 Options Studied “Do Nothing” Replace Truss Members Add Support Stringers

21. National Best Practices Conference Covered Bridge Preservation Structural Upgrades

22. National Best Practices Conference Covered Bridge Preservation Structural Upgrades

23. National Best Practices Conference Covered Bridge Preservation Structural Upgrades

24. National Best Practices Conference Covered Bridge Preservation Structural Upgrades

25. National Best Practices Conference Covered Bridge Preservation Structural Upgrades

26. National Best Practices Conference Covered Bridge Preservation Structural Upgrades

27. National Best Practices Conference Covered Bridge Preservation Maintenance Proper Maintenance = Short Presentation Most Maintenance is Simple to Perform Removal of Sand Annually Semi-Annual Inspection of the Roof Replacement of Damaged/Missing Siding Repair or Replacement of Damaged Bridge Members Proper Detailing is Important

28. National Best Practices Conference Covered Bridge Preservation Maintenance

29. National Best Practices Conference Covered Bridge Preservation Maintenance

30. National Best Practices Conference Covered Bridge Preservation Maintenance

31. National Best Practices Conference Covered Bridge Preservation Historical Research Inspection Roof Types Structural Upgrade Maintenance Summary

32. National Best Practices Conference Covered Bridge Preservation Sean T. James, P.E. Hoyle, Tanner & Associates, Inc. 150 Dow Street Manchester, New Hampshire (603) 669-5555 sjames@hta-nh.com Questions