BOULDER HILL ROAD
Carrying BOULDER HILL ROAD over ROCKAWAY CREEK TRIBUTARY
100 ft East of Guinea Rd, Hunterdon, New Jersey
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: BOULDER HILL ROAD
The BOULDER HILL ROAD bridge in Hunterdon, New Jersey carries BOULDER HILL ROAD over ROCKAWAY CREEK TRIBUTARY. It was built in 1926, making it 100 years old today. It was last reconstructed in 2010, extending its service life. The structure is built primarily of steel and spans 1 section, stretching 8.2 meters (27 feet) end to end. Daily traffic averages 256 vehicles, placing it in the lower-traffic tier of New Jersey bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 8/9, substructure at 8/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 39.0 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How BOULDER HILL ROAD compares
Live comparison across New Jersey.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1926
- Last Reconstructed
- 2010
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 8.2 m (27 ft)
- Deck Width
- 5.5 m (18 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 256 vehicles/day
- Structure Number
- 1000044
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) rates good at 8/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates good at 8/9, with no significant deterioration on file.
How to read this record
This page shows what the last federal inspection recorded, not whether BOULDER HILL ROAD is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare BOULDER HILL ROAD against other structures in Hunterdon and across New Jersey. New Jersey bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for BOULDER HILL ROAD?
BOULDER HILL ROAD in Hunterdon, New Jersey has a deck rating of 7/9, superstructure rating of 8/9, and substructure rating of 8/9 on the FHWA's 0–9 scale.
How often is BOULDER HILL ROAD inspected?
BOULDER HILL ROAD's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 256 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. BOULDER HILL ROAD is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for BOULDER HILL ROAD?
BOULDER HILL ROAD has an NBI inventory load rating of 39.0 metric tons.
Who is responsible for maintaining BOULDER HILL ROAD?
BOULDER HILL ROAD is owned and maintained by County Highway Agency.
How old is BOULDER HILL ROAD and does age affect safety?
BOULDER HILL ROAD was built in 1926, making it 100 years old and last reconstructed in 2010.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.