Quebec Street over SH 470 Ml
Douglas County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Quebec Street over SH 470 Ml in Douglas County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1984 and reconstructed in 2014, making it 41 years old at the 2025 inventory.
- It carries about 39,039 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 119 of the 264 inventoried bridges in Douglas County rated fair (45.1%); 6 (2.3%) 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 December 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 → (39.56352, -104.90421)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete multiple box beam |
| Length | about 211 ft |
| Location | 2.4 Mi West of Jct I 25 |
| NBI structure number | F-17-HJ |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Douglas County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 25 Ml over Happy Canyon Creek | 1999 | 116,000 | Fair |
| I 25 Ml over Ridgegate Pkwy | 2008 | 116,000 | Fair |
| I 25 Ml over Clydesdale Ln | 1999 | 116,000 | Fair |
| SH 470 Ml over Willow Creek | 1984 | 95,000 | Fair |
| I 25 Nbnd Ramp over Ramp to County Line Rd R | 1983 | 85,500 | Fair |
| C470 EB Ramp to 25 over Lrt | 2005 | 85,500 | Fair |
All bridges nearby: Douglas County, CO bridge conditions · every bridge in Douglas County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.