US HIGHWAY 81
Carrying US HIGHWAY 81 over CREEK
4 EAST OF HAMILTON, Pembina, North Dakota
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
US HIGHWAY 81 in Pembina, North Dakota sits above 37% of rated North Dakota bridges on inventory load rating (26 t), while its 1951 build year is earlier than 80% of Pembina's recorded-year cohort (204 bridges).
US HIGHWAY 81 in Pembina, North Dakota is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1951, it carries 1 rated component 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 ND:0081222285
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · CULVERT-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- ARTERIAL-ADT Arterial 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 HIGHWAY 81
The US HIGHWAY 81 bridge in Pembina, North Dakota carries US HIGHWAY 81 over CREEK. It was built in 1951, making it 75 years old today. The structure is built primarily of concrete and spans 2 sections, stretching 6.4 meters (21 feet) end to end. Daily traffic averages 1,250 vehicles, placing it in the moderately-trafficked tier of North Dakota bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 4/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order.
How US HIGHWAY 81 compares
Age against the county: built in 1951, earlier than 164 of Pembina's 204 bridges with a recorded construction year (80%), against a county median build year of 1967. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across North Dakota bridges with a recorded inventory load rating (4,249 of 4,255 rated).
US HIGHWAY 81 vs every rated North Dakota bridge
Inventory load rating (metric tons), FHWA NBI, this state
26 Top 63% higher than 37% of 4,249 bridges
rated North Dakota 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.
Pembina inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 204 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
- 1951
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 6.4 m (21 ft) 0
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,250 vehicles/day
- Structure Number
- 0081222285
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
US HIGHWAY 81 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 HIGHWAY 81 against other structures in Pembina and across North Dakota. North Dakota 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 HIGHWAY 81?
US HIGHWAY 81 in Pembina, North Dakota on the FHWA's 0–9 scale.
How often is US HIGHWAY 81 inspected?
US HIGHWAY 81'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 1,250 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US HIGHWAY 81 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 HIGHWAY 81?
US HIGHWAY 81 has an NBI inventory load rating of 25.9 metric tons.
Who is responsible for maintaining US HIGHWAY 81?
US HIGHWAY 81 is owned and maintained by State Highway Agency.
How old is US HIGHWAY 81 and does age affect safety?
US HIGHWAY 81 was built in 1951, making it 75 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.