MONMOUTH STREET
Carrying MONMOUTH STREET over AMTRAK NE CORRIDOR
AT JCT WITH EAST STATE ST, Mercer, New Jersey
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: MONMOUTH STREET
The MONMOUTH STREET bridge in Mercer, New Jersey carries MONMOUTH STREET over AMTRAK NE CORRIDOR. It was built in 1911, making it 115 years old today. It was last reconstructed in 1930, extending its service life. The structure is built primarily of steel and spans 3 sections, stretching 36.9 meters (121 feet) end to end. Daily traffic averages 2,114 vehicles, placing it in the moderately-trafficked tier of New Jersey bridges. It is owned and maintained by Unknown.
The latest FHWA inspection records show a deck rating of 3/9, superstructure at 4/9, substructure at 4/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 8.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How MONMOUTH STREET 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 How the historical reference is calculated.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
- 1911
- Last Reconstructed
- 1930
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 36.9 m (121 ft)
- Deck Width
- 8.4 m (28 ft)
- Owner
- Unknown
- Avg Daily Traffic
- 2,114 vehicles/day
- Structure Number
- 1149165
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 3/9, the deck (driving surface) is in poor shape, with advanced wear flagged for priority repair.
- • The superstructure (beams and supports above the deck) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
How to read this record
MONMOUTH STREET 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 MONMOUTH STREET 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 MONMOUTH STREET?
MONMOUTH STREET in Mercer, New Jersey has a deck rating of 3/9, superstructure rating of 4/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is MONMOUTH STREET inspected?
MONMOUTH STREET'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 2,114 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. MONMOUTH STREET 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 MONMOUTH STREET?
MONMOUTH STREET has an NBI inventory load rating of 8.2 metric tons.
Who is responsible for maintaining MONMOUTH STREET?
MONMOUTH STREET is owned and maintained by Unknown.
How old is MONMOUTH STREET and does age affect safety?
MONMOUTH STREET was built in 1911, making it 115 years old and last reconstructed in 1930.
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.