OLD NJ 27
Carrying OLD NJ 27 over MILLSTONE RIVER
0.25 MI S of CR 614, Mercer, New Jersey
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: OLD NJ 27
The OLD NJ 27 bridge in Mercer, New Jersey carries OLD NJ 27 over MILLSTONE RIVER. It was built in 1798, making it 228 years old today. The structure is built primarily of masonry and spans 4 sections, stretching 33.5 meters (110 feet) end to end. Daily traffic averages 24 vehicles, placing it in the lower-traffic tier of New Jersey bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show superstructure at 3/9, substructure at 3/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order. Its NBI inventory load rating is 18.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How OLD NJ 27 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 How the historical reference is calculated.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
- 1798
- Material
- Masonry
- Number of Spans
- 4
- Structure Length
- 33.5 m (110 ft)
- Deck Width
- 8.1 m (27 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 24 vehicles/day
- Structure Number
- 1105151
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The superstructure (beams and supports above the deck) rates poor at 3/9, advanced deterioration that should be prioritized for repair.
- • The substructure (piers and abutments) is in poor condition (3/9), showing advanced deterioration that may require priority repair.
How to read this record
OLD NJ 27 is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare OLD NJ 27 against other structures in Mercer 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 OLD NJ 27?
OLD NJ 27 in Mercer, New Jersey, superstructure rating of 3/9, and substructure rating of 3/9 on the FHWA's 0–9 scale.
How often is OLD NJ 27 inspected?
OLD NJ 27'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 24 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. OLD NJ 27 is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for OLD NJ 27?
OLD NJ 27 has an NBI inventory load rating of 18.1 metric tons.
Who is responsible for maintaining OLD NJ 27?
OLD NJ 27 is owned and maintained by State Highway Agency.
How old is OLD NJ 27 and does age affect safety?
OLD NJ 27 was built in 1798, making it 228 years old.
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.