ST 3 NB/PLGRM HWY
Carrying ST 3 NB/PLGRM HWY over HWY FRANKLIN ST
2 MI E OF PEMBROKE TL, Plymouth, Massachusetts
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: ST 3 NB/PLGRM HWY
The ST 3 NB/PLGRM HWY bridge in Plymouth, Massachusetts carries ST 3 NB/PLGRM HWY over HWY FRANKLIN ST. It was built in 1962, making it 64 years old today. The structure is built primarily of steel and spans 3 sections, stretching 33.5 meters (110 feet) end to end. Daily traffic averages 34,314 vehicles, placing it in the heavily-trafficked tier of Massachusetts bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 6/9, substructure at 5/9. 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 32.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How ST 3 NB/PLGRM HWY 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 How the historical reference is calculated.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
- 1962
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 33.5 m (110 ft)
- Deck Width
- 13.5 m (44 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 34,314 vehicles/day
- Structure Number
- D1401048HDOTNBI
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • The superstructure (beams and supports above the deck) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • At 5/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
ST 3 NB/PLGRM HWY 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 ST 3 NB/PLGRM HWY against other structures in Plymouth 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 ST 3 NB/PLGRM HWY?
ST 3 NB/PLGRM HWY in Plymouth, Massachusetts has a deck rating of 4/9, superstructure rating of 6/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is ST 3 NB/PLGRM HWY inspected?
ST 3 NB/PLGRM HWY'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 34,314 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ST 3 NB/PLGRM HWY 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 ST 3 NB/PLGRM HWY?
ST 3 NB/PLGRM HWY has an NBI inventory load rating of 32.1 metric tons.
Who is responsible for maintaining ST 3 NB/PLGRM HWY?
ST 3 NB/PLGRM HWY is owned and maintained by State Highway Agency.
How old is ST 3 NB/PLGRM HWY and does age affect safety?
ST 3 NB/PLGRM HWY was built in 1962, making it 64 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.