Old highway 16
Carrying Old highway 16 over CREEK
11.5 N 3 W OF MARMARTH, Slope, North Dakota
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Old highway 16 in Slope, North Dakota sits above 94% of rated North Dakota bridges on inventory load rating (62 t), while its 2010 build year is earlier than 21% of Slope's recorded-year cohort (43 bridges).
Old highway 16 in Slope, North Dakota is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2010, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 9. 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 ND:000000044103120
POST-2000 · CONCRETE · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- LOCAL-ADT Local 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: Old highway 16
The Old highway 16 bridge in Slope, North Dakota carries Old highway 16 over CREEK. It was built in 2010, making it 16 years old today. The structure is built primarily of concrete and spans 2 sections, stretching 6.2 meters (20 feet) end to end. Daily traffic averages 100 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 culvert at 9/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How Old highway 16 compares
Age against the county: built in 2010, earlier than 9 of Slope's 43 bridges with a recorded construction year (21%), against a county median build year of 1988. 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).
Old highway 16 vs every rated North Dakota bridge
Inventory load rating (metric tons), FHWA NBI, this state
62 Top 6% higher than 94% 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.
Slope inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 43 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
- 2010
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 6.2 m (20 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 100 vehicles/day
- Structure Number
- 000000044103120
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 Old highway 16 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 Old highway 16 against other structures in Slope 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 Old highway 16?
Old highway 16 in Slope, North Dakota on the FHWA's 0–9 scale.
How often is Old highway 16 inspected?
Old highway 16'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 100 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Old highway 16 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 Old highway 16?
Old highway 16 has an NBI inventory load rating of 62.1 metric tons.
Who is responsible for maintaining Old highway 16?
Old highway 16 is owned and maintained by County Highway Agency.
How old is Old highway 16 and does age affect safety?
Old highway 16 was built in 2010, making it 16 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.