Home › Colorado › Summit County › I 70 Ml over County Road

I 70 Ml over County Road

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

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

I 70 Ml over County Road in Summit 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 7 (good condition) on the 0-9 scale.
It was built in 1977, making it 48 years old at the 2025 inventory.
It carries about 27,000 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 16 of the 63 inventoried bridges in Summit County rated good (25.4%); 5 (7.9%) 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	Continuous concrete tee beam
Length	about 130 ft
Location	2.1 Mi E of Jct SH91
NBI structure number	F-12-AA
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 Wbnd over Forest Service Road	2021	36,000	Good
I 70 Ebnd over Forest Service Road	2021	36,000	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
SH 9 Ml over Blue River	2013	21,000	Good