Mill Street over Roaring Fork River
Pitkin County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mill Street over Roaring Fork River in Pitkin 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 1985, making it 40 years old at the 2025 inventory.
- It carries about 2,985 vehicles a day (traffic count year 2022).
- Its listed owner is a city or municipal highway agency.
- It is one of 42 of the 65 inventoried bridges in Pitkin County rated fair (64.6%); 0 (0.0%) 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 May 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 → (39.19412, -106.81746)
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 | Prestressed concrete multiple box beam |
| Length | about 78 ft |
| Location | 4 Blk E of Hwy 82 |
| NBI structure number | ASP-MILL ST A |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Pitkin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 82 Ml over Co Rd Castle Creek | 1961 | 25,000 | Fair |
| SH 82 Ml Ebnd over Draw | 2005 | 22,000 | Good |
| SH 82 ML-S/E Bound over Draw | 2004 | 22,000 | Good |
| SH 82 Ml Ebnd over Draw | 2003 | 22,000 | Good |
| SH 82 Ml over Stage Road | 1994 | 22,000 | Good |
| SH 82 Ml over Maroon Creek | 2005 | 22,000 | Fair |
All bridges nearby: Pitkin County, CO bridge conditions · every bridge in Pitkin County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.