OLD NJ 27
Carrying OLD NJ 27 over MILLSTONE RIVER
0.25 MI S of CR 614, Mercer, New Jersey
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
OLD NJ 27 in Mercer, New Jersey is rated Poor in the FHWA's 2024 National Bridge Inventory.
Built in 1798, it carries 2 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 3. The lowest applicable rating sets the federal condition category, so this Poor result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure NJ:1105151
ERA-UNK · MAT-OTHER · LONG-SPAN-RUN · TIED-CTRL · TRACE-ADT · LIGHT-LOAD · CAT-POOR
- ERA-UNK Year unknown
- MAT-OTHER Other
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- TRACE-ADT Trace ADT
- LIGHT-LOAD Light load
- CAT-POOR Poor
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
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.
How OLD NJ 27 compares
Live comparison across New Jersey bridges with a recorded inventory load rating (6,826 of 6,827 rated).
OLD NJ 27 vs every rated New Jersey bridge
Inventory load rating (metric tons), FHWA NBI, this state
18 Top 96% higher than 4% of 6,826 bridges
rated New Jersey bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Mercer inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 414 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
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
Condition Analysis
- • The superstructure (beams and supports above the deck) rates poor at 3/9, with advanced deterioration recorded on the latest inspection.
- • The substructure (piers and abutments) is in poor condition (3/9), showing advanced deterioration on the inspecting agency's 0-9 scale.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.