I 00091 NB ML
Carrying I 00091 NB ML over I 91NB OVER RAMP D
I 91 EXIT 19, Caledonia, Vermont
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
I 00091 NB ML in Caledonia, Vermont sits above 86% of rated Vermont bridges on inventory load rating (55 t), while its 1978 build year is earlier than 28% of Caledonia's recorded-year cohort (247 bridges).
I 00091 NB ML in Caledonia, Vermont is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1978, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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 VT:200091081N03162
INTERSTATE-ERA · STEEL · SINGLE-SPAN · TIED-CTRL · HEAVY-ADT · HEAVY-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
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: I 00091 NB ML
The I 00091 NB ML bridge in Caledonia, Vermont carries I 00091 NB ML over I 91NB OVER RAMP D. It was built in 1978, making it 48 years old today. The structure is built primarily of steel and spans 1 section, stretching 34.1 meters (112 feet) end to end. Daily traffic averages 10,000 vehicles, placing it in the moderately-trafficked tier of Vermont bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How I 00091 NB ML compares
Age against the county: built in 1978, earlier than 70 of Caledonia's 247 bridges with a recorded construction year (28%), against a county median build year of 1974. This is one of the newer structures in its county.
Live comparison across Vermont bridges with a recorded inventory load rating (2,861 of 2,862 rated).
I 00091 NB ML vs every rated Vermont bridge
Inventory load rating (metric tons), FHWA NBI, this state
55 Top 14% higher than 86% of 2,861 bridges
rated Vermont 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.
Caledonia inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 247 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
- 1978
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 34.1 m (112 ft)
- Deck Width
- 12.4 m (41 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 10,000 vehicles/day
- Structure Number
- 200091081N03162
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) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
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 I 00091 NB ML 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 I 00091 NB ML against other structures in Caledonia and across Vermont. Vermont 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 I 00091 NB ML?
I 00091 NB ML in Caledonia, Vermont has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is I 00091 NB ML inspected?
I 00091 NB ML'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 10,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I 00091 NB ML is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for I 00091 NB ML?
I 00091 NB ML has an NBI inventory load rating of 55.3 metric tons.
Who is responsible for maintaining I 00091 NB ML?
I 00091 NB ML is owned and maintained by State Highway Agency.
How old is I 00091 NB ML and does age affect safety?
I 00091 NB ML was built in 1978, making it 48 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.