US 40 Ml over Shelton Ditch
Routt County, Colorado · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 40 Ml over Shelton Ditch in Routt County, Colorado, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1954, making it 71 years old at the 2025 inventory.
- It carries about 6,400 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 7 of the 97 inventoried bridges in Routt County rated poor (7.2%); 7 (7.2%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (40.4972, -107.2464)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Concrete slab |
| Length | about 22 ft |
| Location | E edge of Hayden |
| NBI structure number | C-08-A_MINOR |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Routt County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 40 Ml over Fish Creek | 1980 | 28,000 | Fair |
| US 40 Ml over Mt Werner Road | 1980 | 23,000 | Fair |
| US 40 Ml over Walton Creek | 1990 | 9,200 | Fair |
| Fish Crk Falls Rd over Spring Creek | 1973 | 5,949 | Fair |
| US 40 Ml over E Fork Elk River | 2013 | 5,700 | Good |
| US 40 Ml over Sage Creek | 2015 | 5,100 | Good |
All bridges nearby: Routt County, CO bridge conditions · every bridge in Routt County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.