US Bridges

I 70 Ml over Soda Creek Road

Fair

Clear Creek County, Colorado · In Idaho Springs · Structure no. F-14-X

Built
1958
67 years old, rebuilt 1987
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
124 ft
3 main spans
Daily traffic
39,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 70 Ml over Soda Creek Road is a concrete tee beam carrying I 70 Ml over Soda Creek Road in Clear Creek County, Colorado. It was built in 1958 and reconstructed in 1987, so it is 67 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 39,000 vehicles a day, roughly 8% of them trucks, projected to reach 47,970 by 2040. The structure is 124 ft (37.7 m) long and 80 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesI 70 Ml
CrossesSoda Creek Road
LocationIn Idaho Springs
RouteInterstate 70A
Coordinates39.74141, -105.51233
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckOther
Main spans3
Design loadHS 20
Structure length124 ft (37.7 m)
Longest span45 ft (13.7 m)
Deck width80 ft (24.5 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,000 (2020)
Projected traffic47,970 by 2040
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 70 Ml over Soda Creek Road built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1987.

What condition is I 70 Ml over Soda Creek Road in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does I 70 Ml over Soda Creek Road carry?

About 39,000 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is I 70 Ml over Soda Creek Road?

The structure is 124 ft (37.7 m) long with a longest span of 45 ft (13.7 m) and a deck 80 ft wide.

Who owns I 70 Ml over Soda Creek Road?

It is owned by the State Highway Agency.