US 44 HARDING ST
Carrying US 44 HARDING ST over RR MBTA/CSX
.5 M W OF EVERETT ST, Plymouth, Massachusetts
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
US 44 HARDING ST in Plymouth, Massachusetts sits above 36% of rated Massachusetts bridges on inventory load rating (33 t), while its 1963 build year is earlier than 47% of Plymouth's recorded-year cohort (287 bridges).
US 44 HARDING ST in Plymouth, Massachusetts is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1963, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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:M1805445CDOTNBI
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · SUB-LED · HEAVY-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- SUB-LED Substructure-led
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
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: US 44 HARDING ST
The US 44 HARDING ST bridge in Plymouth, Massachusetts carries US 44 HARDING ST over RR MBTA/CSX. It was built in 1963, making it 63 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 29.0 meters (95 feet) end to end. Daily traffic averages 31,681 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 5/9, superstructure at 5/9, substructure at 4/9. 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.
How US 44 HARDING ST compares
Age against the county: built in 1963, earlier than 136 of Plymouth's 287 bridges with a recorded construction year (47%), against a county median build year of 1962. This is one of the newer structures in its county.
Live comparison across Massachusetts bridges with a recorded inventory load rating (5,295 rated).
US 44 HARDING ST vs every rated Massachusetts bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 64% higher than 36% 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.
Plymouth inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 287 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
- 1963
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 29.0 m (95 ft)
- Deck Width
- 14.4 m (47 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 31,681 vehicles/day
- Structure Number
- M1805445CDOTNBI
Condition Analysis
- • The deck (driving surface) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear on file for this vintage.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
US 44 HARDING ST 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 US 44 HARDING ST 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 US 44 HARDING ST?
US 44 HARDING ST in Plymouth, Massachusetts has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is US 44 HARDING ST inspected?
US 44 HARDING 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 31,681 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US 44 HARDING ST 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 US 44 HARDING ST?
US 44 HARDING ST has an NBI inventory load rating of 33.0 metric tons.
Who is responsible for maintaining US 44 HARDING ST?
US 44 HARDING ST is owned and maintained by State Highway Agency.
How old is US 44 HARDING ST and does age affect safety?
US 44 HARDING ST was built in 1963, making it 63 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.
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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.