BOUNDARY ROAD
Carrying BOUNDARY ROAD over BIG BROOK
2 MI SOUTH OF ROUTE 18, Monmouth, New Jersey
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
BOUNDARY ROAD in Monmouth, New Jersey sits above 11% of rated New Jersey bridges on inventory load rating (24 t), while its 1969 build year is earlier than 58% of Monmouth's recorded-year cohort (505 bridges).
BOUNDARY ROAD in Monmouth, New Jersey is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1969, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. 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:130ML55
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · SUPER-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- SUPER-LED Superstructure-led
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard 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: BOUNDARY ROAD
The BOUNDARY ROAD bridge in Monmouth, New Jersey carries BOUNDARY ROAD over BIG BROOK. It was built in 1969, making it 57 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 29.0 meters (95 feet) end to end. Daily traffic averages 2,795 vehicles, placing it in the moderately-trafficked tier of New Jersey bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 4/9, substructure at 6/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How BOUNDARY ROAD compares
Age against the county: built in 1969, earlier than 294 of Monmouth's 505 bridges with a recorded construction year (58%), against a county median build year of 1972. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across New Jersey bridges with a recorded inventory load rating (6,826 of 6,827 rated).
BOUNDARY ROAD vs every rated New Jersey bridge
Inventory load rating (metric tons), FHWA NBI, this state
24 Top 89% higher than 11% 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.
Monmouth inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 505 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
- 1969
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 29.0 m (95 ft)
- Deck Width
- 12.3 m (40 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 2,795 vehicles/day
- Structure Number
- 130ML55
Condition Analysis
- • The deck (driving surface) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • At 4/9, the superstructure (beams and supports above the deck) is in poor shape, with advanced wear on file for this vintage.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
BOUNDARY ROAD 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 BOUNDARY ROAD against other structures in Monmouth 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 BOUNDARY ROAD?
BOUNDARY ROAD in Monmouth, New Jersey has a deck rating of 5/9, superstructure rating of 4/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is BOUNDARY ROAD inspected?
BOUNDARY 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 2,795 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. BOUNDARY ROAD 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 BOUNDARY ROAD?
BOUNDARY ROAD has an NBI inventory load rating of 23.6 metric tons.
Who is responsible for maintaining BOUNDARY ROAD?
BOUNDARY ROAD is owned and maintained by County Highway Agency.
How old is BOUNDARY ROAD and does age affect safety?
BOUNDARY ROAD was built in 1969, making it 57 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.
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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.