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Mahanoy Creek Bridge


FROM THE 1996-2001 PENNSYLVANIA HISTORIC BRIDGE SURVEY: The one span, 115' long, pin connected, Pratt thru truss bridge is dated 1910 in PennDOT's inspection file, but stylistically, it could date to ca. 1900. The fabricator is unknown. It is supported on ashlar abutments, and the trusses are traditionally composed. The verticals are toe-out channels with lacing and pin plates for the lower panel point connections. The portal brace is plain, and square lattice railings inside the truss lines remain. The bridge has no innovative or distinctive details, and it represents the standardization of details that dominates those examples built after about 1895. It is complete, but within the regional context, with over 120 metal truss bridges from ca. 1880 through the 1940s, this example does not stand out. It is not an early example of its type. Neither the bridge nor its setting are historically or technologically significant.


Through truss bridge over Mahanoy Creek on TR 480 Rattlesnake Road
Northumberland County, Pennsylvania
Intact but closed to all traffic
Built ca. 1900
Pratt through truss
Span length: 115.2 ft.
Total length: 115.2 ft.
Deck width: 16.0 ft.
Approximate latitude, longitude
+40.74313, -76.62420   (decimal degrees)
40°44'35" N, 76°37'27" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/362870/4511511 (zone/easting/northing)
Quadrangle map:
Valley View
Inventory numbers
PA 49 7220 0480 0167 (Pennsylvania Bridge Management System number)
PANBI 29388 (Pennsylvania BRKEY bridge number on the 2011 NBI)
BH 31470 (Bridgehunter.com ID)
Inspection report (as of March 2017)
Overall condition: Poor
Superstructure condition rating: Imminent Failure (1 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 21.3 (out of 100)
View more at BridgeReports.com


Mahanoy Creek Bridge
Posted March 13, 2018, by Dan Martin (saiengr [dot] com)

The bridge is closed to traffic as of 3/08/18