Fdr 631 over Piedra River
Hinsdale County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Fdr 631 over Piedra River in Hinsdale 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 1991, making it 34 years old at the 2025 inventory.
- It carries about 533 vehicles a day (traffic count year 2003).
- It is one of 25 of the 32 inventoried bridges in Hinsdale County rated fair (78.1%); 0 (0.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 7 to 6, superstructure 7 to 6.
- Its most recent inspection on record is dated August 2024, 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 → (37.42761, -107.19378)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 83 ft |
| Location | 16.4 Mi on Fdr 631 |
| NBI structure number | 021306000001169 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Hinsdale County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 149 Ml over Henson Creek | 1954 | 1,600 | Fair |
| City St. 8 & Half over Lake Fork Gunnison River | 1986 | 980 | Fair |
| Mtn Village Blv over Pedestrian | 2019 | 693 | Good |
| SH 149 Ml over Lake Fk Gunnison River | 1954 | 560 | Fair |
| County Road 30 over Lake Fork Gunnison River | 1986 | 436 | Fair |
| Fdr 631 over Williams Creek | 1991 | 408 | Good |
All bridges nearby: Hinsdale County, CO bridge conditions · every bridge in Hinsdale County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.