HWY DORCHSTR AVE
Carrying HWY DORCHSTR AVE over TR RED LINE (TUNNEL)
0.3 MI S OF EXIT 16 I-93, Suffolk, Massachusetts
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
HWY DORCHSTR AVE in Suffolk, Massachusetts sits above 6% of rated Massachusetts bridges on inventory load rating (20 t), while its 1925 build year is earlier than 84% of Suffolk's recorded-year cohort (488 bridges).
HWY DORCHSTR AVE in Suffolk, Massachusetts is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1925, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. The lowest applicable rating sets the federal condition category, so this Fair 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 MA:B161298MQMBTNBI
PRE-1950 · STEEL · SINGLE-SPAN · TIED-CTRL · ADT-UNK · STANDARD-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- STEEL Steel
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- ADT-UNK ADT unknown
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
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: HWY DORCHSTR AVE
The HWY DORCHSTR AVE bridge in Suffolk, Massachusetts carries HWY DORCHSTR AVE over TR RED LINE (TUNNEL). It was built in 1925, making it 101 years old today. The structure is built primarily of steel and spans 1 section, stretching 13.7 meters (45 feet) end to end. Average daily traffic is not reported for this structure. It is owned and maintained by Other State Agencies.
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. All reported major components score above the Poor range.
How HWY DORCHSTR AVE compares
Age against the county: built in 1925, earlier than 410 of Suffolk's 488 bridges with a recorded construction year (84%), against a county median build year of 1970. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Massachusetts bridges with a recorded inventory load rating (5,295 rated).
HWY DORCHSTR AVE vs every rated Massachusetts bridge
Inventory load rating (metric tons), FHWA NBI, this state
20 Top 94% higher than 6% of 5,295 bridges
rated Massachusetts 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.
Suffolk inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 489 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
- 1925
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 13.7 m (45 ft)
- Deck Width
- 18.3 m (60 ft)
- Owner
- Other State Agencies
- Structure Number
- B161298MQMBTNBI
Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether HWY DORCHSTR AVE 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 DORCHSTR AVE against other structures in Suffolk 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 DORCHSTR AVE?
HWY DORCHSTR AVE in Suffolk, Massachusetts 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 HWY DORCHSTR AVE inspected?
HWY DORCHSTR AVE's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. HWY DORCHSTR AVE 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 DORCHSTR AVE?
HWY DORCHSTR AVE has an NBI inventory load rating of 20.2 metric tons.
Who is responsible for maintaining HWY DORCHSTR AVE?
HWY DORCHSTR AVE is owned and maintained by Other State Agencies.
How old is HWY DORCHSTR AVE and does age affect safety?
HWY DORCHSTR AVE was built in 1925, making it 101 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.
Share this inspection record
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.