Preservation of Historic Gilbertville Covered Bridge Oct, 2007 By S. D. Daniel Lee, P.E. and Matthew Anderson, M.S. In Articles, Historic Structures This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ S. D. Daniel Lee, P.E.S. D. Daniel Lee, P.E., a Senior Principal Engineer at Fay, Spofford & Thorndike, LLC, Burlington, MA. He can be reached via email at DLee@fstinc.com. Prev Infinite Load Path? Next Anchoring Blast-Resistant Windows