IRR BIA RTE 22
Carrying IRR BIA RTE 22 over TRIB TO RED BUTTE BAY
SE LAKE SAKAKAWEA, Mercer, North Dakota
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRR BIA RTE 22 in Mercer, North Dakota sits above 3% of rated North Dakota bridges on inventory load rating (5 t), while its 1960 build year is earlier than 76% of Mercer's recorded-year cohort (72 bridges).
IRR BIA RTE 22 in Mercer, North Dakota is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1960, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 2. 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:0000A04301B0500
INTERSTATE-ERA · STEEL · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · LIGHT-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- LOCAL-ADT Local ADT
- LIGHT-LOAD Light 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: IRR BIA RTE 22
The IRR BIA RTE 22 bridge in Mercer, North Dakota carries IRR BIA RTE 22 over TRIB TO RED BUTTE BAY. It was built in 1960, making it 66 years old today. The structure is built primarily of steel and spans 3 sections, stretching 16.2 meters (53 feet) end to end. Daily traffic averages 200 vehicles, placing it in the lower-traffic tier of North Dakota bridges. It is owned and maintained by Bureau of Indian Affairs.
The latest FHWA inspection records show culvert at 2/9. The weakest component sits in critical 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 IRR BIA RTE 22 compares
Age against the county: built in 1960, earlier than 55 of Mercer's 72 bridges with a recorded construction year (76%), against a county median build year of 1979. 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).
IRR BIA RTE 22 vs every rated North Dakota bridge
Inventory load rating (metric tons), FHWA NBI, this state
5 Top 97% higher than 3% 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.
Mercer inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 72 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
- 1960
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 16.2 m (53 ft)
- Deck Width
- 39.7 m (130 ft)
- Owner
- Bureau of Indian Affairs
- Avg Daily Traffic
- 200 vehicles/day
- Structure Number
- 0000A04301B0500
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
IRR BIA RTE 22 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 IRR BIA RTE 22 against other structures in Mercer 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 IRR BIA RTE 22?
IRR BIA RTE 22 in Mercer, North Dakota on the FHWA's 0–9 scale.
How often is IRR BIA RTE 22 inspected?
IRR BIA RTE 22'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 200 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRR BIA RTE 22 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 IRR BIA RTE 22?
IRR BIA RTE 22 has an NBI inventory load rating of 4.5 metric tons.
Who is responsible for maintaining IRR BIA RTE 22?
IRR BIA RTE 22 is owned and maintained by Bureau of Indian Affairs.
How old is IRR BIA RTE 22 and does age affect safety?
IRR BIA RTE 22 was built in 1960, making it 66 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.