HWY BEACON ST
Carrying HWY BEACON ST over TR GREEN LINE D
OVER GREEN LINE, Middlesex, Massachusetts
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: HWY BEACON ST
The HWY BEACON ST bridge in Middlesex, Massachusetts carries HWY BEACON ST over TR GREEN LINE D. It was built in 1917, making it 109 years old today. It was last reconstructed in 1997, extending its service life. The structure is built primarily of prestressed concrete and spans 1 section, stretching 11.3 meters (37 feet) end to end. Daily traffic averages 24,000 vehicles, placing it in the heavily-trafficked tier of Massachusetts bridges. It is owned and maintained by Other State Agencies.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 6/9. 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 42.0 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How HWY BEACON ST compares
Live comparison across Massachusetts.
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 How the historical reference is calculated.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
- 1917
- Last Reconstructed
- 1997
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 11.3 m (37 ft)
- Deck Width
- 15.9 m (52 ft)
- Owner
- Other State Agencies
- Avg Daily Traffic
- 24,000 vehicles/day
- Structure Number
- N120414U3MBTNBI
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates fair at 6/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether HWY BEACON ST 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 HWY BEACON ST against other structures in Middlesex and across Massachusetts. Massachusetts 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 HWY BEACON ST?
HWY BEACON ST in Middlesex, Massachusetts has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is HWY BEACON ST inspected?
HWY BEACON ST'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 24,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. HWY BEACON ST 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 HWY BEACON ST?
HWY BEACON ST has an NBI inventory load rating of 42.0 metric tons.
Who is responsible for maintaining HWY BEACON ST?
HWY BEACON ST is owned and maintained by Other State Agencies.
How old is HWY BEACON ST and does age affect safety?
HWY BEACON ST was built in 1917, making it 109 years old and last reconstructed in 1997.
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.