BARNHART ISLAND RD
Carrying BARNHART ISLAND RD over S CH ST LAWRENCE R
BARNHART IS & S CH ST LAW, St. Lawrence, New York
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
BARNHART ISLAND RD in St. Lawrence, New York sits above 25% of rated New York bridges on inventory load rating (33 t), while its 1956 build year is earlier than 76% of St. Lawrence's recorded-year cohort (312 bridges).
BARNHART ISLAND RD in St. Lawrence, New York is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1956, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. 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 NY:000000005523630
INTERSTATE-ERA · STEEL · MULTI-SPAN · SUB-LED · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 3 spans
- SUB-LED Substructure-led
- LOCAL-ADT Local ADT
- 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: BARNHART ISLAND RD
The BARNHART ISLAND RD bridge in St. Lawrence, New York carries BARNHART ISLAND RD over S CH ST LAWRENCE R. It was built in 1956, making it 70 years old today. It was last reconstructed in 1997, extending its service life. The structure is built primarily of steel continuous and spans 3 sections, stretching 328.6 meters (1078 feet) end to end. Daily traffic averages 925 vehicles, placing it in the lower-traffic tier of New York 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. All reported major components score above the Poor range.
How BARNHART ISLAND RD compares
Age against the county: built in 1956, earlier than 238 of St. Lawrence's 312 bridges with a recorded construction year (76%), against a county median build year of 1980. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across New York bridges with a recorded inventory load rating (17,641 of 17,642 rated).
BARNHART ISLAND RD vs every rated New York bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 75% higher than 25% of 17,641 bridges
rated New York 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.
St. Lawrence inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 312 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
- 1956
- Last Reconstructed
- 1997
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 328.6 m (1078 ft)
- Deck Width
- 13.4 m (44 ft)
- Owner
- Other State Agencies
- Avg Daily Traffic
- 925 vehicles/day
- Structure Number
- 000000005523630
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
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 BARNHART ISLAND RD 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 BARNHART ISLAND RD against other structures in St. Lawrence and across New York. New York 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 BARNHART ISLAND RD?
BARNHART ISLAND RD in St. Lawrence, New York 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 BARNHART ISLAND RD inspected?
BARNHART ISLAND RD'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 925 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. BARNHART ISLAND RD 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 BARNHART ISLAND RD?
BARNHART ISLAND RD has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining BARNHART ISLAND RD?
BARNHART ISLAND RD is owned and maintained by Other State Agencies.
How old is BARNHART ISLAND RD and does age affect safety?
BARNHART ISLAND RD was built in 1956, making it 70 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.
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.