Powerscourt Bridge, Spanning Chateauguay River, First Concession Road,, Chateaugay, Franklin County, NY
Note Steel Floor Beams.
Note Double Intersection Of Diagonal Tension Member.
Photo Caption Pages
First Concession Road, Chateaugay vicinity, NY
Find maps of Chateaugay, NY
Documentation compiled after 1968.
Survey number HAER NY-332
Building/structure dates: 1861 initial construction
Significance: The Powerscourt Bridge is one of the oldest covered bridges in Canada and the only surviving type of a McCallum type truss in the world. Patented in 1851 and 1857, the McCallum truss was used on North American railways until about 1870, when prefabricated iron trusses came into widespread use.
McCallum, Daniel Craig
Historic American Engineering Record (Library of Congress)
PERSPECTIVE, LOOKING NW.
BELLYSHOT FROM EASTERN ABUTMENT. NOTE STEEL FLOOR BEAMS.
ELEVATION FROM NORTH.
PERSPECTIVE, EASTERN END OF PORTAL AND TRUSS.
WEST END OF EAST SPAN, SOUTH PANEL. NOTE DOUBLE INTERSECTION OF DIAGONAL TENSION MEMBER.
PERSPECTIVE OF WEST SPAN.
INTERIOR WEST PORTAL, LOOKING WEST.
PERSPECTIVE VIEW OF PORTAL AND SOUTH FACE FROM WEST BANK.
WESTERN PORTAL AND ROADWAY.
PERSPECTIVE FROM NW FROM WEST BANK.
BELOW DECK VIEW, WEST BANK.
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