US Bridges

County Road 179 over Trout Creek

Fair

Routt County, Colorado · 1.5 MI S of US HWY 40 · Structure no. 107017901.30907

Built
1985
40 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
308
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 179 over Trout Creek is a prestressed concrete tee beam carrying County Road 179 over Trout Creek in Routt County, Colorado. It was built in 1985, so it is 40 years old, younger 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 308 vehicles a day, roughly 27% of them trucks, projected to reach 367 by 2042. The structure is 74 ft (22.6 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCounty Road 179
CrossesTrout Creek
Location1.5 MI S of US HWY 40
RouteCounty Highway 0
CountyRoutt County
StateColorado
Coordinates40.47108, -107.01132
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85 US tons
Inventory rating34.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span70 ft (21.3 m)
Deck width31 ft (9.5 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic308 (2023)
Projected traffic367 by 2042
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 179 over Trout Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road 179 over Trout Creek 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 October 2024.

How much traffic does County Road 179 over Trout Creek carry?

About 308 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is County Road 179 over Trout Creek?

The structure is 74 ft (22.6 m) long with a longest span of 70 ft (21.3 m) and a deck 31 ft wide.

Who owns County Road 179 over Trout Creek?

It is owned by the County Highway Agency.