Alloway Creek Bridge
Photo taken by Doug Kerr in March 2011
BH Photo #195244
SOURCE: NEW JERSEY DEPARTMENT OF TRANSPORTATION - NEW JERSEY HISTORIC BRIDGE DATA "The bridge is a center-bearing, steel-truss swing span with modified Warren pony truss approach span. The bridge was hand operated and the mechanism is in place, although the bridge has not been opened since the mid-1960s. It has ornamental finials, lattice work, and plaque on the tower. The bridge is the best example of its type in the southern part of the state. It is one of a small handful of documented surviving NJ Bridge Co. bridges in the United States."
"The swing span is inoperable, but the operating mechanism remains extant. It is a center-bearing type, hand-powered by a crank
attachment inset in the deck. The crank turned a pinion gear against a circular rack. The rack is mounted to the top of the center pier. The
bridge was designed to open in either direction, and turns upon a center bearing. A box-shaped system of four girder with four balance
wheels supported and balanced the bridge on the center pier when the bridge was in the open position. The south end of the bridge rests
on steel rollers with axles perpendicular to the length of the bridge. They were hand operated by levers and designed to lift the bridge in
the closed position, lock it in place, and provide it with a footing on the abutment. The swing span has timber pile fenders. It provided a
42'-channel to river navigation, and last opened in the mid-1960s.
Numerous alterations have been made to the substructure and the approach span, but none seriously compromise the bridge's overall
integrity of design. The original piers and abutments were masonry. In 1925 the center pier was widened and reinforced with concrete. In
1942 the south abutment was rebuilt with concrete, and in 1957 the abutments were raised by approximately 12 inches. In 1966 the
northern pier and abutment were reinforced with concrete. In 1976, following a vehicular accident, an end post and portion of the lower
chord of the west side of the pony truss were replaced and repairs made to the panel points. A vertical on the east side of swing span was
replaced, and the lattice railings were removed and beam guard rails added. In 1979 the approach span was strengthened with the
addition of longitudinal steel stringers that effectively relieved the pony trusses of load bearing responsibility. In 1991 the single-lane
bridge was closed to vehicular traffic due to safety concerns and structural inadequacies."
- Swing bridge over Alloway Creek on CR 623
- Salem County, New Jersey
- Closed to all traffic
- Future prospects
- Slated for demolition and replacement.
- Built 1905, altered 1976, closed 1991
- - New Jersey Bridge Co.
- Steel Swing Through truss, Center Bearing; Warren Pony Truss on east approach
Length of largest span: 48.9 ft.
Total length: 152.9 ft.
Deck width: 14.4 ft.
Vertical clearance above deck: 17.3 ft.
Eligible for the National Register of Historic Places
- Approximate latitude, longitude
- +39.52810, -75.45063 (decimal degrees)
39°31'41" N, 75°27'02" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 18/461270/4375480 (zone/easting/northing)
- Quadrangle map:
- Inventory numbers
- NJ 1701399 (New Jersey bridge number)
BH 25485 (Bridgehunter.com ID)
- Inspection (as of 12/2003)
- Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 33.1 (out of 100)
- Average daily traffic (as of 2001)
- August 8, 2015: Updated by Douglas Butler: My Technical Drawing
- July 2, 2014: New Street View added by Ralph Demars
- October 25, 2011: Photos imported by Jason Smith
- June 19, 2011: Updated by Jodi Christman: Added description, altered date, bridge builder
- June 14, 2011: New photos from Jodi Christman
- March 15, 2011: Updated by Nathan Holth: This bridge is doomed.
- March 14, 2011: New photos from Doug Kerr
- HAER NJ-88 - New Bridge Road Alloways Creek Bridge, Spanning Alloways Creek on New Bridge Road (County Road No. 623), Hancocks Bridge vicinity, Salem County, NJ
- Doug Kerr
- Nathan Holth
- Jodi Christman - masterofchaos [at] outlook [dot] com
- NJDOT - Historic Bridge Survey
- Historicbridges.org - by Nathan Holth
- Douglas Butler