MOUNTAIN BLVd
Carrying MOUNTAIN BLVd over STONY BROOK
AT RT 531 JCT, Somerset, New Jersey
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: MOUNTAIN BLVd
The MOUNTAIN BLVd bridge in Somerset, New Jersey carries MOUNTAIN BLVd over STONY BROOK. It was built in 1908, making it 118 years old today. It was last reconstructed in 1968, extending its service life. The structure is built primarily of prestressed concrete and spans 2 sections, stretching 17.4 meters (57 feet) end to end. Daily traffic averages 13,979 vehicles, placing it in the heavily-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 5/9, substructure at 5/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 27.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How MOUNTAIN BLVd 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 How the historical reference is calculated.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
- 1908
- Last Reconstructed
- 1968
- Material
- Prestressed Concrete
- Number of Spans
- 2
- Structure Length
- 17.4 m (57 ft)
- Deck Width
- 16.6 m (54 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 13,979 vehicles/day
- Structure Number
- 18L1009
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether MOUNTAIN BLVd is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare MOUNTAIN BLVd against other structures in Somerset 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 MOUNTAIN BLVd?
MOUNTAIN BLVd in Somerset, New Jersey has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is MOUNTAIN BLVd inspected?
MOUNTAIN BLVd'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 13,979 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. MOUNTAIN BLVd is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for MOUNTAIN BLVd?
MOUNTAIN BLVd has an NBI inventory load rating of 27.2 metric tons.
Who is responsible for maintaining MOUNTAIN BLVd?
MOUNTAIN BLVd is owned and maintained by County Highway Agency.
How old is MOUNTAIN BLVd and does age affect safety?
MOUNTAIN BLVd was built in 1908, making it 118 years old and last reconstructed in 1968.
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.