County Road 4405 over Fire Mountain Canal
Delta County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road 4405 over Fire Mountain Canal in Delta County, Colorado, 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 1976, making it 49 years old at the 2025 inventory.
- It carries about 38 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 30 of the 64 inventoried bridges in Delta County rated fair (46.9%); 2 (3.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, posting recommended but not legally implemented (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 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 → (38.92564, -107.52461)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 36 ft |
| Location | 2 Mi NE of SH133/Bowie RD |
| NBI structure number | DEL4405D-.1-61 |
| Condition class | Fair |
| Traffic status (item 41) | Open, posting recommended but not legally implemented |
| Last inspection (item 90) | October 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 Colorado department of transportation.
Busiest bridges in Delta County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 50 Ml over Wells Gulch | 1955 | 9,800 | Fair |
| US 50 Ml over Point Creek | 1977 | 9,300 | Fair |
| SH 65 Ml over Gunnison River | 1980 | 7,000 | Fair |
| US 50 Ml Ebnd over Gunnison River | 1966 | 6,500 | Fair |
| US 50 Ml Wbnd over Gunnison River | 1992 | 6,500 | Fair |
| SH 65 Ml over Surface Creek | 1957 | 5,700 | Fair |
All bridges nearby: Delta County, CO bridge conditions · every bridge in Delta County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.