US Bridges

County Road 179 over Trout Creek

Fair

Routt County, Colorado · 4.1 MI S of US HWY 40 · Structure no. 107017904.10925

Built
1985
40 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
124
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 5 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 124 vehicles a day, roughly 20% of them trucks, projected to reach 148 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

Open in Google Maps
CarriesCounty Road 179
CrossesTrout Creek
Location4.1 MI S of US HWY 40
RouteCounty Highway 0
CountyRoutt County
StateColorado
Coordinates40.45542, -106.98741
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating100.3 US tons
Inventory rating41.6 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 width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic124 (2023)
Projected traffic148 by 2042
Trucks20%
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 124 vehicles per day (2023 count), of which roughly 20% 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.