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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 August 20, 2026

I70 Ml Wbnd over Simba Run Underpass in Eagle County, Colorado, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
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.
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.

Component ratings


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

Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.

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