IRRFT COUNTY HIWAY
Carrying IRRFT COUNTY HIWAY over SHEYENNE RIVER
3 SOUTH 3 WEST OF TOLNA, Nelson, North Dakota
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: IRRFT COUNTY HIWAY
The IRRFT COUNTY HIWAY bridge in Nelson, North Dakota carries IRRFT COUNTY HIWAY over SHEYENNE RIVER. It was built in 1983, making it 43 years old today. The structure is built primarily of prestressed concrete continuous and spans 3 sections, stretching 37.8 meters (124 feet) end to end. Daily traffic averages 40 vehicles, placing it in the lower-traffic tier of North Dakota bridges. It is owned and maintained by County Highway Agency.
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. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 19.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How IRRFT COUNTY HIWAY compares
Live comparison across North Dakota.
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 How the historical reference is calculated.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
- 1983
- Material
- Prestressed Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 37.8 m (124 ft)
- Deck Width
- 9.8 m (32 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 40 vehicles/day
- Structure Number
- 000000032101290
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • 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 fair condition (6/9), with minor deterioration that may require routine maintenance.
How to read this record
This page shows what the last federal inspection recorded, not whether IRRFT COUNTY HIWAY 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 IRRFT COUNTY HIWAY against other structures in Nelson 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 IRRFT COUNTY HIWAY?
IRRFT COUNTY HIWAY in Nelson, North Dakota 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 IRRFT COUNTY HIWAY inspected?
IRRFT COUNTY HIWAY'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 40 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRRFT COUNTY HIWAY 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 IRRFT COUNTY HIWAY?
IRRFT COUNTY HIWAY has an NBI inventory load rating of 19.9 metric tons.
Who is responsible for maintaining IRRFT COUNTY HIWAY?
IRRFT COUNTY HIWAY is owned and maintained by County Highway Agency.
How old is IRRFT COUNTY HIWAY and does age affect safety?
IRRFT COUNTY HIWAY was built in 1983, making it 43 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.