Historic bridges are specialty of the firm. Our associated consultants have together inventoried, evaluated and documented hundreds of highway and
railroad bridges ranging from 19th century iron trusses and stone arches to
mid-20th century concrete rigid-frames and post-tensioned welded girder spans.
HDC Associate Consultant Eric DeLony is recognized as one of the
world's leading authorities on the history and preservation of bridges.
Statewide surveys in Iowa, Massachusetts and New Hampshire have involved the evaluation of thousands of bridges up to 1970.
For a closer look at our work in one state see New Hampshire Historic
Bridges Project Sheet.
Click picture for close up view|
Banner Photo Note: Route 195 over Taunton River, Swansea-Fall River, MA.
This 895'-8" continuous thru-truss span was just 5'-4" shy of the world's record
(held by Mississippi River Bridge at Dubuque, IA) when completed in 1963.