IRR FT McDERMITT
Carrying IRR FT McDERMITT over QUINN RVR
FT. McDERMITT INDIAN RES., Humboldt, Nevada
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRR FT McDERMITT in Humboldt, Nevada sits above 1% of rated Nevada bridges on inventory load rating (11 t), while its 1976 build year is earlier than 35% of Humboldt's recorded-year cohort (54 bridges).
IRR FT McDERMITT in Humboldt, Nevada is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1976, 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 NV:M1660B
INTERSTATE-ERA · STEEL · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · LIGHT-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 2 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 FT McDERMITT
The IRR FT McDERMITT bridge in Humboldt, Nevada carries IRR FT McDERMITT over QUINN RVR. It was built in 1976, making it 50 years old today. The structure is built primarily of steel and spans 2 sections, stretching 17.4 meters (57 feet) end to end. Daily traffic averages 55 vehicles, placing it in the lower-traffic tier of Nevada bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How IRR FT McDERMITT compares
Age against the county: built in 1976, earlier than 19 of Humboldt's 54 bridges with a recorded construction year (35%), against a county median build year of 1970. This is one of the newer structures in its county.
Live comparison across Nevada bridges with a recorded inventory load rating (2,090 of 2,099 rated).
IRR FT McDERMITT vs every rated Nevada bridge
Inventory load rating (metric tons), FHWA NBI, this state
11 Top 99% higher than 1% of 2,090 bridges
rated Nevada 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.
Humboldt inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 54 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
- 1976
- Material
- Steel
- Number of Spans
- 2
- Structure Length
- 17.4 m (57 ft)
- Deck Width
- 15.2 m (50 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 55 vehicles/day
- Structure Number
- M1660B
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
IRR FT McDERMITT 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 FT McDERMITT against other structures in Humboldt and across Nevada. Nevada 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 FT McDERMITT?
IRR FT McDERMITT in Humboldt, Nevada on the FHWA's 0–9 scale.
How often is IRR FT McDERMITT inspected?
IRR FT McDERMITT'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 55 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRR FT McDERMITT 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 FT McDERMITT?
IRR FT McDERMITT has an NBI inventory load rating of 10.7 metric tons.
Who is responsible for maintaining IRR FT McDERMITT?
IRR FT McDERMITT is owned and maintained by County Highway Agency.
How old is IRR FT McDERMITT and does age affect safety?
IRR FT McDERMITT was built in 1976, making it 50 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.