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Ravine Road Bridge

Warren County, New Jersey

Photos 

Notice how the original railings stop for the end posts.

Photo taken by Andrew Pearce in September 2012

Enlarge

BH Photo #239706

Map 

Description 

The 4 section pony Pratt/Howe bridge is made from non-flared I beams (standard width flat flange?), welded together. Gusset plates are used but they are so small that they may have been added at a later date. Top chord is 2 I beams welded to a top plate. Diagonals are single beams, but counters - both sets - are I beams just as heavy as the diagonals; thus this one could be called a Howe. End posts are made from 2 I beams, open but connected with a few small plates. Outriggers may be original and just welded on. Bridge is clearly marked "Warren 1938". Floor beams appear as old as the outriggers. Steel is by Carnegie. Deck is timber under asphalt. Secondary abutment next to bridge implies this one replaced something much older, or was itself moved a dozen feet at some point.

Facts 

Overview
Pony truss bridge over Pohatcong Creek on Ravine Road
Location
Warren County, New Jersey
Status
Open to traffic
History
Built 1938; rehabilitated 1997
Design
Pratt pony truss
Dimensions
Length of largest span: 52.2 ft.
Total length: 56.1 ft.
Deck width: 12.1 ft.
Recognition
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+40.65278, -75.12806   (decimal degrees)
40°39'10" N, 75°07'41" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/489173/4500221 (zone/easting/northing)
Quadrangle map:
Easton
Average daily traffic (as of 2017)
67
Inventory numbers
NJ 2102001 (New Jersey bridge number)
BH 25644 (Bridgehunter.com ID)
Inspection report (as of April 2017)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Good (7 out of 9)
Deck condition rating: Good (7 out of 9)
Sufficiency rating: 47.8 (out of 100)
View more at BridgeReports.com

Categories 

Built 1938 (863)
Built during 1930s (11,767)
NR-eligible (4,056)
New Jersey (1,590)
One-lane traffic (7,613)
Open (39,975)
Owned by county (20,846)
Pony truss (16,240)
 Pratt pony truss (3,654)
Pratt truss (9,344)
Skewed (4,915)
Span length 50-75 feet (10,103)
Total length 50-75 feet (9,318)
Truss (32,953)
Warren County, New Jersey (147)

Update Log 

  • September 21, 2012: Updated by Andrew Pearce: added data and pictures
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Comments 

Ravine Road Bridge
Posted January 21, 2016, by Nathan Holth (webmaster [at] historicbridges [dot] org)

To answer Andrew's question in the photo gallery about the floor beams, the reason they are riveted is because they were salvaged from an older pin-connected truss bridge and reused (potentially the previous bridge here... the historic bridge survey does say the previous bridge here was a pin-connected pony). That the floorbeams are salvaged from a pin-connected truss is made clear by the empty unused holes at the ends, including four flange holes at each end which would have received the u-bolt hangers. I field visited this bridge and will (eventually) have it added over at historicbridges.org