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I 70 Ml Wbnd over BlueRvr-Adams Ave and...

Summit County, Colorado · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

I 70 Ml Wbnd over BlueRvr-Adams Ave and... in Summit County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 20,000 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 42 of the 63 inventoried bridges in Summit County rated fair (66.7%); 5 (7.9%) 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.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 554 ft
Location	In Silverthorne
NBI structure number	F-12-X
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 70 Wbnd over Forest Service Road	2021	36,000	Good
I 70 Ebnd over Forest Service Road	2021	36,000	Good
I 70 Ml over County Road	1977	27,000	Good
SH 9 Ml over Tenmile Creek	1980	24,000	Fair
SH 9 Ml over I 70 Ml	1971	24,000	Fair
SH 9 Ml over Pedestrian Underpass	2023	22,287	Good