US Bridges

I 70 Frontage RD over Clear Creek SR

Fair

Clear Creek County, Colorado · 0.1 MI W. of Silverplume · Structure no. F-14-M

Built
1938
87 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
1 main span
Daily traffic
18,815
2024 count
Owner
State
State Highway Agency

About this bridge

I 70 Frontage RD over Clear Creek SR is a steel stringer/multi-beam or girder carrying I 70 Frontage RD over Clear Creek SR in Clear Creek County, Colorado. It was built in 1938, so it is 87 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 18,815 vehicles a day, roughly 9% of them trucks, projected to reach 23,518 by 2044. The structure is 54 ft (16.6 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI 70 Frontage RD
CrossesClear Creek SR
Location0.1 MI W. of Silverplume
RouteInterstate 70A
CountyClear Creek County
StateColorado
Coordinates39.69562, -105.73525
Functional classRural Local

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.8 US tons
Inventory rating30.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length54 ft (16.6 m)
Longest span50 ft (15.2 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,815 (2024)
Projected traffic23,518 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 70 Frontage RD over Clear Creek SR built?

It was built in 1938, making it 87 years old in 2025.

What condition is I 70 Frontage RD over Clear Creek SR 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 April 2023.

How much traffic does I 70 Frontage RD over Clear Creek SR carry?

About 18,815 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is I 70 Frontage RD over Clear Creek SR?

The structure is 54 ft (16.6 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.

Who owns I 70 Frontage RD over Clear Creek SR?

It is owned by the State Highway Agency.