US 40 Ml over Agricultural Ditch
Jefferson County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 40 Ml over Agricultural Ditch in Jefferson County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1937 and reconstructed in 1957, making it 88 years old at the 2025 inventory.
- It carries about 23,000 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 279 of the 468 inventoried bridges in Jefferson County rated fair (59.6%); 30 (6.4%) are rated poor.
- 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 → (39.74004, -105.12515)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 22 ft |
| Location | Between Quail & Simms St. |
| NBI structure number | F-16-AR |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Jefferson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 70 Ml over Garrison Street | 1967 | 118,000 | Fair |
| I 70 Ml over Carr Street | 1967 | 118,000 | Fair |
| I 70 Ml over SH 121 Ml | 1996 | 118,000 | Fair |
| US 6 Ml over SH 95 Ml/sheridan Ave. | 2011 | 114,000 | Good |
| I-70 Ml over SH 72 Ml/ward Road | 2024 | 112,000 | Good |
| I70 Ml over Light Rail | 2010 | 106,000 | Fair |
All bridges nearby: Jefferson County, CO bridge conditions · every bridge in Jefferson County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.