Cast and Wrought Iron Bridges, 1970-1991 and undated (includes facsimiles)

The IHTIA considered funding a survey of cast and wrought-iron bridges in the United States. The box includes the notes for that survey and other research materials focusing on iron bridges. It includes correspondence, draft reports, agreements, clippings, engineering drawings, computer-generated measurement lists, and handwritten notes. It also includes facsimile engineering drawings. Subjects include cast and wrought-iron bridges in Massachusetts, Pennsylvania and New Jersey, along with truss bridges and iron bridges in general. Highlights include HAER reports on specific bridges in Massachusetts, Pennsylvania and New Jersey.