Nfsr 371 over St. Charles River
Custer County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfsr 371 over St. Charles River in Custer 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 1938 and reconstructed in 1980, making it 87 years old at the 2025 inventory.
- It carries about 286 vehicles a day (traffic count year 2003).
- It is one of 12 of the 20 inventoried bridges in Custer County rated fair (60.0%); 1 (5.0%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated November 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 → (37.98176, -105.06372)
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 girder and floorbeam |
| Length | about 33 ft |
| Location | St. Charles @ Lake Isabel |
| NBI structure number | 021203000001204 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | November 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 Custer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 69 Ml over Democrat Gulch | 1993 | 2,100 | Good |
| SH 69 Ml over Texas Creek | 1906 | 1,800 | Fair |
| SH 69 Ml over Taylor Creek | 1956 | 1,800 | Good |
| SH 69 Ml over Grape Creek | 1956 | 1,800 | Fair |
| SH 96 Ml over Querida Gulch | 1978 | 1,800 | Good |
| SH 96 Ml over Hardscrabble Creek | 1991 | 1,000 | Good |
All bridges nearby: Custer County, CO bridge conditions · every bridge in Custer County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.