Hadley Bow Bridge
Photo taken August 1994 by Jet Lowe for the Historic American Engineering Record
BH Photo #108095
This is the only remaining example of a semi (or half) deck Lenticular Truss bridge, and only one of three that are thought to have been built. Constructed in 1885, this, like other lenticular truss bridges built by Berlin Iron Bridge Co., is made of wrought iron and is pin connected. Aside from its unique main truss, the approach span is notable for its small 3 panel design, which makes it look much more like the original patented "elliptical" truss from which the lenticular design is derived.
Due to deteriorating conditions the bridge was closed to traffic in 1983. By 2000 the bridge had deteriorated further and it was scheduled for demolition, but public support for rehabilitating the span led to just its deck being removed. Between 2000 and 2003 plans were made to rehabilitate the bridge, and these were realized in 2005 with the subsequent bridge re-opening occurring in 2006.
One caveat of the rehabilitation was that the bridge had to open with no load limits. To accomplish this, the deck on both spans is a steel stringer. The lenticular trusses are no longer load bearing
- Pin connected Lenticular half-through truss bridge over Sacandaga River on Old Corinth Road at Hadley
- Hadley, Saratoga County, New York
- Open to traffic
- Built 1885 by the Berlin Iron Bridge Co.; closed 1983; Reconstructed 2006
- - Berlin Iron Bridge Co. of East Berlin, Connecticut
- Lenticular half-through truss with Lenticular Pony truss approach
Length of largest span: 136.0 ft.
Total length: 180.0 ft.
Deck width: 17.0 ft.
Posted to the National Register of Historic Places on March 25, 1977
- Also called
- Bow Bridge (common name)
Old Corinth Road Bridge
Hadley Parabolic Bridge
Hadley Bow String Bridge
- Approximate latitude, longitude
- +43.31390, -73.84509 (decimal degrees)
43°18'50" N, 73°50'42" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 18/593654/4796321 (zone/easting/northing)
- Quadrangle map:
- Lake Luzerne
- Inventory numbers
- NRHP 77000981 (National Register of Historic Places reference number)
NY 2202740 (New York State bridge identification number)
BH 26750 (Bridgehunter.com ID)
- Inspection (as of 08/2014)
- Deck condition rating: Very Good (8 out of 9)
Superstructure condition rating: Very Good (8 out of 9)
Substructure condition rating: Serious (3 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 38.0 (out of 100)
- June 22, 2017: New Street View added by Dana and Kay Klein
- May 7, 2015: New photos from Michael Quiet
- March 2, 2015: Photo imported by Dave King
- May 1, 2014: Updated by Michael Quiet: Added History
- April 21, 2014: Updated by Michael Quiet: Added categories "Pin-connected", "One-lane traffic", "Wrought Iron"
- January 20, 2014: Updated by CANALLER: Added Info & Photo.
- December 16, 2011: Updated by Frank Hicks: Added GPS coordinates
- September 11, 2006: Posted new photos