US 40 Ml over Storm Flow Culvert
Arapahoe County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 40 Ml over Storm Flow Culvert in Arapahoe County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1988 and reconstructed in 2010, making it 37 years old at the 2025 inventory.
- It carries about 21,000 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 267 of the 392 inventoried bridges in Arapahoe County rated fair (68.1%); 21 (5.4%) 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 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 → (39.74002, -104.80172)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 22 ft |
| Location | 1.3 Mi E of Jct I 225 |
| NBI structure number | F-17-FA |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2023 |
| 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 Arapahoe County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 25 Ml over SH 88 Ml W./belleview | 1958 | 246,000 | Fair |
| I 25 Ml over Orchard Road | 1958 | 233,000 | Fair |
| I 25 Ml over Dry Creek Rd | 1987 | 212,000 | Fair |
| I 25 Ml over SH 88 Ml East | 2017 | 212,000 | Good |
| I 25 Ml over County Line Road | 1958 | 171,000 | Fair |
| I 225 Ml over Tollgate Creek | 1965 | 140,000 | Good |
All bridges nearby: Arapahoe County, CO bridge conditions · every bridge in Arapahoe County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.