I70 Ml Wbnd over Simba Run Underpass
Eagle County, Colorado · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I70 Ml Wbnd over Simba Run Underpass in Eagle County, Colorado, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2017, making it 8 years old at the 2025 inventory.
- It carries about 14,500 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 72 of the 173 inventoried bridges in Eagle County rated good (41.6%); 13 (7.5%) 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 July 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (39.64097, -106.39997)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 115 ft |
| Location | 1.2 MI W of EXIT 176 |
| NBI structure number | F-11-BU |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| 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 Eagle County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 70 Ml over US Hwy 6/US Hwy 24 RR | 1970 | 33,000 | Fair |
| I 70 Ml over Gore Creek | 1970 | 33,000 | Fair |
| I 70 Ml Wbnd over Polk Creek | 2023 | 23,000 | Good |
| SH 82 Ml over Roaring Fork River | 1987 | 21,000 | Good |
| I 70F Spur over I 70A Ml | 1972 | 19,000 | Fair |
| I 70 Eagle Spur over Eagle River | 1972 | 19,000 | Fair |
All bridges nearby: Eagle County, CO bridge conditions · every bridge in Eagle County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.