Irr Cordero Mine R over Mcdermitt Crk
Humboldt County, Nevada · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Cordero Mine R over Mcdermitt Crk in Humboldt County, Nevada, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1957, making it 68 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2017).
- Its listed owner is the state highway agency.
- It is one of 34 of the 54 inventoried bridges in Humboldt County rated fair (63.0%); 1 (1.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (41.96659, -117.83171)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 39 ft |
| Location | Southwest of Mcdermitt |
| NBI structure number | B 692 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Nevada department of transportation.
Busiest bridges in Humboldt County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 787 Hansen St over Sprr | 1967 | 12,000 | Fair |
| Cross Road over I 80 | 1970 | 9,000 | Fair |
| US 95 over I 80 | 1976 | 7,050 | Good |
| US 95 over Humboldt Rvr | 1986 | 6,550 | Fair |
| US 95 over UPRR | 1999 | 6,550 | Fair |
| I 80 over McNITCH RD | 1970 | 5,200 | Fair |
All bridges nearby: Humboldt County, NV bridge conditions · every bridge in Humboldt County · Nevada bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.