IRR FT McDERMITT
Carrying IRR FT McDERMITT over QUINN RVR
FT. McDERMITT INDIAN RES., Humboldt, Nevada
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
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. Its NBI inventory load rating is 10.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How IRR FT McDERMITT compares
Live comparison across Nevada.
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 How the historical reference is calculated.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
- 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.
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.