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Asbury Rt173 bridge over Mulhockaway Creek


south side showing proximity to Rt78

Google screen cap

Photo taken by Andrew Pearce


BH Photo #524236


This is a surprisingly hefty bridge for one so short and old and for it's location. NJ Rt173 is an old road, formerly called Rt22, Rt9, the original NJ Turnpike (ca 1812) and the Easton-Newark Highway. Before that it was a Lenapi Indian trail. When the main highway, Rt78, was built in the 1950s-1960s, right next to Rt173, it became a local bypass road that only sees heavy traffic when Rt78 is backed up. So it's good that it was built so strongly.

It's also surprising that this location counts as Asbury, which is miles to the north. Hampton begins just yards to the east, and I guess Pattenburg ends at Rt78; this bridge is really just across the highway and then 1/4 mile east from Baptist Church Rd in Pattenburg.

Here's info from the county with the length typo: Structure Number: 1024151, Location: 0.5 MI E OF I-78 & CR 614 (Lat: 40.640911, Lng: -74.987511), Route carried "on" structure: State highway 173, Year Built: 1919, Status: Open, Structure Length: 2.16m (7.09ft), Average Daily Traffic: 4,280 (year 2016), Truck Traffic: 5%, Average Future Daily Traffic: 5,992 (year 2036), Features Intersected: MULHOCKAWAY CREEK Minimum Vertical Clearance: 30+ m (98+ ft), Kilometerpoint: 14.452, Lanes on structure: 2, Owner: State Highway Agency, Approaching Roadway Width: 91.0m (298.6ft), Skew: 4 degrees, Material/Design: Steel, Design/Construction: Girder and Floorbeam System, Number Of Spans In Main Unit: 1, Length of Maximum Span: 2.1m (6.9ft), Curb-To-Curb Width: 8.9m (29.2ft), Out-to-Out Width: 9.3m (30.5ft) Condition: Deck: Fair, Superstructure: Poor, Substructure: Fair, Channel: Satisfactory, Operating Rating: 53.5 metric tons, Method Used To Determine Operating Rating: Load Factor (LF), Inventory Rating: 31.8 metric tons, Method Used To Determine Inventory Rating: Load Factor (LF), Structural Evaluation: Meets minimum limits, Deck Geometry: Meets minimum limits, Waterway Adequacy: Equal to present desirable criteria, Approach Roadway Alignment: Equal to present desirable criteria, Length Of Structure Improvement: 0.29m (0.95ft), Designated Inspection Frequency: Every 24 months, Critical Feature Inspection Frequency: Every 24 months, Inspection Date: Febuary 2016, Critical Feature Inspection Date: Febuary 2016, Bridge Improvement Cost: $1,308,000, Roadway Improvement Cost: $154,000, Total Project Cost: $2,210,000 ( Estimate for 2016), Deck Structure Type: Concrete Cast-file-Place, Wearing Surface/Protective System: Wearing Surface: Bituminous


Pony/through plate girder bridge over Mulhockaway Creek on NJ Rt173
Asbury, Hunterdon County, New Jersey
Open to traffic, adequate to current needs
Built 1919 by the state of NJ
Pony plate girder
Span length: 70.9 ft.
Total length: 70.9 ft.
Deck width: 29.2 ft.
Also called
NBI Bridge ID 1024151
Approximate latitude, longitude
+40.64093, -74.98735   (decimal degrees)
40°38'27" N, 74°59'14" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/501069/4498898 (zone/easting/northing)
360 ft. above sea level
Inventory numbers
BH 96973 (Bridgehunter.com ID)

Update Log 

  • March 9, 2022: New photos from Andrew Pearce