ND HIGHWAY 18
Carrying ND HIGHWAY 18 over SOUTH BRANCH PARK RIVER
JUST NORTH ND 17, Walsh, North Dakota
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
ND HIGHWAY 18 in Walsh, North Dakota sits above 67% of rated North Dakota bridges on inventory load rating (37 t), while its 1973 build year is earlier than 46% of Walsh's recorded-year cohort (257 bridges).
ND HIGHWAY 18 in Walsh, North Dakota is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1973, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. 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 ND:0018198781
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · SUPER-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- SUPER-LED Superstructure-led
- ARTERIAL-ADT Arterial 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: ND HIGHWAY 18
The ND HIGHWAY 18 bridge in Walsh, North Dakota carries ND HIGHWAY 18 over SOUTH BRANCH PARK RIVER. It was built in 1973, making it 53 years old today. It was last reconstructed in 2003, extending its service life. The structure is built primarily of concrete continuous and spans 3 sections, stretching 41.1 meters (135 feet) end to end. Daily traffic averages 1,000 vehicles, placing it in the lower-traffic tier of North Dakota bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 5/9, substructure at 7/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How ND HIGHWAY 18 compares
Age against the county: built in 1973, earlier than 119 of Walsh's 257 bridges with a recorded construction year (46%), against a county median build year of 1971. This is one of the newer structures in its county.
Live comparison across North Dakota bridges with a recorded inventory load rating (4,249 of 4,255 rated).
ND HIGHWAY 18 vs every rated North Dakota bridge
Inventory load rating (metric tons), FHWA NBI, this state
37 Top 33% higher than 67% 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.
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.
Walsh inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 257 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
- 1973
- Last Reconstructed
- 2003
- Material
- Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 41.1 m (135 ft)
- Deck Width
- 12.4 m (41 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,000 vehicles/day
- Structure Number
- 0018198781
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
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 ND HIGHWAY 18 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 ND HIGHWAY 18 against other structures in Walsh 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 ND HIGHWAY 18?
ND HIGHWAY 18 in Walsh, North Dakota has a deck rating of 7/9, superstructure rating of 5/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is ND HIGHWAY 18 inspected?
ND HIGHWAY 18'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 1,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ND HIGHWAY 18 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 ND HIGHWAY 18?
ND HIGHWAY 18 has an NBI inventory load rating of 37.1 metric tons.
Who is responsible for maintaining ND HIGHWAY 18?
ND HIGHWAY 18 is owned and maintained by State Highway Agency.
How old is ND HIGHWAY 18 and does age affect safety?
ND HIGHWAY 18 was built in 1973, making it 53 years old and last reconstructed in 2003.
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.