BOUNDARY ROAD
Carrying BOUNDARY ROAD over BIG BROOK
2 MI SOUTH OF ROUTE 18, Monmouth, New Jersey
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
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. Its NBI inventory load rating is 23.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How BOUNDARY 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 How the historical reference is calculated.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
- 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
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗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 flagged for priority repair.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
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.
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.